Common Mistakes to Avoid When Growing High-Yielding Cannabis

Growing high-yield cannabis plants can be a challenging task, even for experienced cultivators. With so many factors to consider, from choosing the right strain to proper harvesting techniques, it’s easy to make mistakes that can negatively impact the plant’s growth and overall yield. In this comprehensive guide, we’ll take a closer look at some of the most common mistakes growers make throughout the various stages of cannabis cultivation, and provide you with valuable tips and insights to help you avoid these pitfalls and produce the best buds possible. So, whether you’re a beginner or an experienced grower, read on to learn more about how to grow healthy and high-yielding cannabis plants.

Choosing the Right Strain


Choosing The Right Strain
One of the most important decisions you’ll face in cultivating high-yield cannabis plants is selecting the right strain. With so many options available, it can be difficult to determine which one will provide you with the biggest and best results. However, taking the time to research and choose the right strain can make all the difference in the success of your grow. In this section, we’ll explore some common mistakes made when picking genetics and buying from unreliable sources, and offer advice on how to avoid these pitfalls. To further help you in this process, we’ve also provided a list of high-yielding strains to consider for your next grow.

Picking Genetics

One of the most crucial aspects of growing high-yield cannabis plants is picking the right genetics. The genetics of your cannabis plant will determine its growth patterns, yield potential, and cannabinoid profile. It’s important to choose strains that will thrive in the environment you plan to grow them in and produce the desired effects.

Factors to Consider for Picking Genetics

Factor Description
Climate Choose a strain that can tolerate the temperature and humidity conditions of your grow space.
Yield Potential Consider the average yield for the strain you’re interested in growing. Strains with a higher yield potential may require more work and resources, but can be worth it in the end.
Growth Rate Some strains grow faster than others. Choose a strain that fits your timeline and growing schedule.
Effects Depending on what you’re looking for in your cannabis, you may want to choose a strain that produces certain effects, such as relaxation or energy.
Resistance to Pests and Diseases Some strains are more resistant to pests and diseases than others. Consider this when selecting a strain to grow.

Researching Genetics and Avoiding Fake or Unstable Strains

There are many seed banks and breeders on the market, and it’s important to do your research before purchasing genetics. Look for reputable seed banks with positive reviews and a proven track record of producing stable, high-quality strains. Avoid buying seeds from unreliable sources, as they may be fake or unstable genetics.

When selecting strains, it’s important to choose genetics that have been stabilized and tested over several generations. This ensures that the strain will be consistent and produce the desired effects. Be wary of “new” or untested strains, as they may not live up to the hype and could ultimately result in a lower yield.

Picking the right genetics is crucial for growing high-yield cannabis plants. Consider factors such as climate, yield potential, growth rate, effects, and resistance to pests and diseases when selecting a strain. Do your research and choose genetics from reputable seed banks to ensure stability and consistency.

Buying from Unreliable Sources

When it comes to buying cannabis seeds, it’s essential to do so from a reliable source. The last thing any cultivator wants is to put in all the effort of growing a plant only to have it turn out to be low-quality or even worse, male. Unfortunately, buying from unreliable sources is a mistake that many new growers make.

There are a few things to consider when deciding where to purchase your cannabis seeds. Firstly, it’s important to look for a reputable and established seed bank or supplier. This will greatly increase your chances of receiving high-quality seeds that will produce a high-yielding plant.

Another factor to consider is the genetics of the strain. It’s important to do your research beforehand and determine which strains are most suitable for your specific growing conditions and preferences. Purchasing random seeds without proper research may result in lower quality yield or unfavourable growing traits.

Additionally, buying from unreliable or unverified sources may put you at risk of scams, such as receiving fake seeds or not receiving your order at all. To avoid this risk, it’s important to check reviews and ratings of the supplier before making any purchases.

To summarize, when buying cannabis seeds, make sure to do thorough research on the strain genetics and choose a reputable seed bank or supplier with positive reviews and ratings. This will help avoid the mistake of buying from unreliable sources and increase the likelihood of high-yield plants.

Common mistakes when buying cannabis seeds from unreliable sources: How to avoid these mistakes:
Purchasing random seeds without proper research Do research on the strain genetics and determine which strain is most suitable for your specific growing conditions and preferences
Buying from an unverified supplier Check reviews and ratings of seed banks or suppliers before making any purchases
Risk of scams, such as receiving fake seeds or not receiving your order at all Choose a reputable and established seed bank or supplier

Germination & Seedling Stage Mistakes

Germination & Seedling Stage Mistakes
One of the most perplexing stages of growing high-yield cannabis plants is the germination and seedling stage. Many beginner growers often make mistakes during this critical stage that can ultimately affect the health and yield of their plants. It’s crucial to ensure that you’re aware of the common mistakes to avoid when growing cannabis during this stage. In this section, we’ll be discussing the mishaps growers make during this significant stage in the cannabis growth cycle.


One of the most common mistakes made during the germination and seedling stage is overwatering. Overwatering your cannabis plants can lead to root rot, which can stunt growth and even kill your plant. Here are some ways to avoid overwatering:

  • Water your plant only when the soil is dry to the touch at least 2 inches deep.
  • If you notice leaves of your cannabis plant becoming yellow or drooping, it could be a sign of overwatering, so it’s essential to stop watering or reduce the amount of water.
  • Use containers or pots that allow proper drainage of excess water.
  • Ensure the humidity level is appropriate. If the humidity level is too high, it can indirectly cause overwatering. High humidity can lead to slow evaporation of water from the soil, roots may become waterlogged, and this can damage the plant. To avoid this, make sure to use a hygrometer to monitor humidity levels, and use a dehumidifier to reduce humidity.

Overwatering at the seedling stage can cause significant problems, so be careful not to overwater your plants. Remember to follow the guidelines for watering and drainage, and pay attention to your plant’s signs as well.

Incorrect Temperature

Maintaining the correct temperature is crucial during the germination and seedling stage. Many growers make the mistake of not paying enough attention to temperature, which can lead to poor germination rates and weak seedlings. It’s important to keep the temperature within the optimal range of 20-25°C (68-77°F).

Germinating and growing cannabis seeds in temperatures that are too low or high can cause serious issues. If the temperature is too low, seedlings may fail to sprout. If the temperature is too high, the seedlings may wilt or become spindly.

To avoid these issues, it’s recommended to use a thermometer to monitor the temperature of the growing area. Growers should also take steps to regulate the temperature. This can include using a heater or air conditioner, adjusting the light source or using a fan to circulate air.

It’s also important to note that temperature can affect the overall growth rate of the plants. If the temperature is too low, the growth of the plants may slow down, which can lead to a lower yield. If the temperature is too high, the plants may grow too quickly, which can affect the quality of the buds.

Maintaining the correct temperature is essential for achieving high-yield cannabis plants.

Temperature Effect on Plants
Below 20°C (68°F) Seedlings may fail to sprout
20-25°C (68-77°F) Optimal temperature range for germination and seedling growth
Above 25°C (77°F) Seedlings may wilt or become spindly

Not Transplanting in Time

One common mistake that many growers make during the germination and seedling stage is not transplanting their cannabis plants in a timely manner. When seeds germinate, they start out in small containers or starter plugs. However, as they grow, their roots need more space to expand and develop. If the plants are not transplanted to larger containers or pots at the right time, their growth can become stunted, and they will not reach their full potential.

The Importance of Transplanting

Transplanting your cannabis plants at the right time is essential for their overall health and growth. When they have outgrown their containers, their roots become compressed, and they can no longer get the nutrients and oxygen they need to thrive. Transplanting allows the roots to spread out and absorb water and nutrients more effectively, which leads to healthier and more robust growth.

When to Transplant

The right time to transplant your cannabis plants depends on various factors, such as the strain, the growing environment, and the size of your containers. In general, you should consider transplanting when your plants have outgrown their current containers, and their roots are starting to become visible on the surface or through the drainage holes. A good rule of thumb is to transplant when the plants have at least two sets of true leaves.

Transplanting Tips

Here are a few tips to help you avoid common mistakes when transplanting your cannabis plants:

Tip Explanation
Be gentle Handle the plants carefully and avoid damaging their roots or stems.
Don’t transplant during the flowering stage Transplanting during the flowering stage can stress the plants and reduce their yield and potency.
Use the right soil mix Choose a high-quality soil mix that is suitable for your plants’ growing needs.
Water thoroughly after transplanting After transplanting, water the plants thoroughly to help them settle into their new containers.

By avoiding the mistake of not transplanting your cannabis plants in time and following these tips, you can increase your chances of growing healthy and high-yielding plants.

Vegging Mistakes

Vegging Mistakes
Growing high-yield cannabis plants involves careful attention and avoiding common mistakes throughout different stages of growth. The vegging stage is crucial for plant development, as it sets the foundation for a successful flowering stage. Unfortunately, many novice growers tend to make mistakes during vegging that hinder plant growth and ultimately reduce yields. Let’s take a closer look at some common vegging mistakes and how to avoid them.

Not Enough/Too Much Light

The amount of light your cannabis plants receive during the vegging stage can greatly impact the size and quality of your yield. Not providing enough light can lead to small, weak plants with lower yields. On the other hand, providing too much light can lead to burnt leaves and stunted growth.

To ensure your plants receive the optimal amount of light, you should invest in high-quality grow lights and consider factors such as the size of your grow space and the number of plants you have. It’s also important to remember that different strains may require different levels of light, so research your chosen strain beforehand.

Here are some common mistakes to avoid when it comes to the lighting of your cannabis plants during the vegging stage:

Mistake Consequence
Not using the right type of light The wrong type of light can lead to poor growth and low yields.
Not providing enough light intensity Plants may grow slowly and produce lower yields.
Providing too much light intensity Plants may become stunted and suffer from burnt leaves.
Not changing the light cycle during the vegging stage Plants may not properly transition into the flowering stage, leading to lower yields.

To avoid these mistakes, regularly monitor and adjust the light intensity and cycle to ensure your cannabis plants are receiving the optimal amount of light during the vegging stage. With proper lighting, you can help your cannabis plants grow to their fullest potential and achieve a high-yield harvest.


During the vegging stage, it’s crucial to ensure that the plants receive the proper amount of nutrients. Overfeeding can result in nutrient burn, which can cause irreversible damage to your plants. On the other hand, underfeeding can lead to nutrient deficiencies, stunted growth, and low-quality buds.

To avoid overfeeding and underfeeding your plants, it’s important to follow a nutrient schedule and closely monitor your plants’ response to the nutrients. Make sure to use high-quality nutrients and follow the manufacturer’s instructions.

Here are some common mistakes that can result in overfeeding or underfeeding your plants:

  • Not adjusting the nutrient schedule based on the plants’ growth stage.
  • Not flushing the plants to remove excess nutrients before harvesting.
  • Not adjusting the pH level of the water/nutrient solution.
  • Not providing enough water, which can lead to nutrient buildup in the soil.
  • Providing too much water, which can wash away the nutrients from the soil.

By avoiding these mistakes and ensuring that your plants receive the proper amount of nutrients, you can promote healthy growth and maximize your yield.

Cuttings’ Mistakes

Taking cuttings is a popular method of propagating cannabis plants. However, even experienced growers can make mistakes during the process that can negatively impact the yield.

Here are some common mistakes to avoid when taking and handling cuttings:

  • Using dull or dirty tools: When taking cuttings, it’s important to use clean and sharp tools to avoid injuring the plants or introducing harmful bacteria or fungi. Make sure to clean your tools before and after each use, and sharpen them regularly to ensure clean cuts.
  • Not taking cuttings from healthy plants: Cuttings should only be taken from healthy plants, as any diseases or pests present on the parent plant will be passed on to the new plant. Look for vibrant and sturdy plants with no signs of disease, pests, or nutrient deficiencies.
  • Not using rooting hormone: Rooting hormone helps cuttings to develop roots faster and more efficiently. Make sure to use a quality rooting hormone and follow the instructions on the label for best results.
  • Placing cuttings in too much or too little light: Cuttings need a certain amount of light to grow, but too much or too little can be harmful. Make sure to provide cuttings with the appropriate amount of light for their stage of growth, and gradually increase light intensity as they mature to avoid shock.
  • Overwatering or underwatering: When taking cuttings, it’s important to provide them with the right amount of water. Overwatering can lead to root rot, while underwatering can cause the cuttings to dry out and die. Monitor soil moisture levels and adjust watering accordingly.
  • Not keeping cuttings at the right temperature: Cuttings need a warm and stable environment to encourage root growth. Make sure to keep them at the right temperature and avoid exposing them to drafts or extreme temperature changes.

By avoiding these common mistakes and following best practices for taking and handling cuttings, growers can increase the chances of success and achieve higher yields from their cannabis plants.

Flowering Mistakes

Flowering Mistakes
The flowering stage is where your cannabis plant will start to produce the buds that you have been waiting for, but it is also the stage where many growers make critical mistakes that can ruin all the hard work done in the previous stages. The wrong light schedule or neglecting environmental factors can cause your plant to become stressed and produce lower yields. Additionally, if you are not careful with your harvesting process, you could end up losing much of the precious THC content of your buds. Let’s take a closer look at some of the crucial mistakes to avoid during this critical stage of your plant’s growth.

Not Adjusting Light Schedule Correctly

One of the most common mistakes that cannabis growers make during the flowering stage is not adjusting the light schedule correctly. The flowering stage is when the plants are most sensitive to changes in light cycles. If you do not adjust the light schedule properly, it can lead to poor yield and lower quality buds. Here are some tips to avoid this mistake:

  • Understand the Light Cycle: Cannabis plants need a specific amount of light to grow and flower. During the flowering stage, the ideal light cycle is 12 hours of light and 12 hours of darkness. However, some strains may require slightly different light cycles, so it is essential to understand the specific needs of your chosen strain.
  • Keep the Light Consistent: During the flowering stage, it is crucial to maintain a consistent light cycle. Any interruption in the light cycle can cause stress to the plant and affect its growth and yield. Make sure you do not disturb the plants during the dark period.
  • Avoid Light Leaks: Light leaks can impact the plants’ ability to flower and reduce their yield. Make sure that no light enters the grow room during the 12-hour dark period. Cover any cracks or gaps with light-proof materials to avoid any light leaks.
  • Use a Timer: Using a timer is an excellent way to ensure that your plants receive the right amount of light during the flowering stage. Set your timer to switch on and off at the same time every day, and let it do the work for you.

Adjusting the light schedule correctly is critical during the flowering stage, as it plays a significant role in determining the quality and yield of your cannabis plants. By following these tips, you can avoid this common mistake and ensure that your plants thrive throughout their life cycle.

Environmental Factors Neglected

When growing cannabis, environmental factors are just as important as any other element in the plant’s growth. Neglecting these factors can lead to disappointing yields. Here are some factors to consider:

  • Humidity: Cannabis thrives in environments with moderate humidity levels. During the flowering stage, the humidity should be reduced to prevent mold and mildew growth on the buds. If the humidity is too low, the plants may become dehydrated and stressed, stunting their growth.
  • Temperature: High temperatures can stress the plants and cause them to grow poorly or even wilt. Low temperatures can also damage the plants, resulting in stunted growth and low yields. It’s important to maintain consistent temperatures throughout the growing process. The ideal temperature range is between 68°F and 78°F.
  • Air Quality: Good air quality is important for proper plant growth, as it helps to prevent the spread of pests and diseases. Clean, well-circulated air is essential for optimal growth, so make sure you have proper ventilation in your growing area.
  • Light: Cannabis plants require a certain amount of light to grow properly. During the vegetative stage, the plants require at least 18 hours of light per day. During the flowering stage, the plants require 12 hours of darkness and 12 hours of light. Make sure your plants are receiving the appropriate amount of light during each stage of growth.
  • Nutrients: Proper nutrients are essential to plant growth, as they help to promote healthy foliage, blooms, and fruit. However, overfeeding your plants can be just as damaging as underfeeding them. Make sure you are using the appropriate nutrients for each stage of growth and are following the manufacturer’s instructions.

Properly managing these environmental factors can help your plants reach their full potential and produce high yields of top-quality cannabis. Don’t neglect them!

Harvesting Mistakes

When it comes to harvesting high-yield cannabis plants, it is essential to avoid mistakes that could compromise the quality and yield of your crop. Let’s take a closer look at some common harvesting mistakes:

Mistake Description Consequence
Harvesting Too Early Harvesting before the buds have fully developed and matured Low potency, reduced yield, and reduced flavor
Harvesting Too Late Allowing the buds to over-mature and become too dense or dry Reduced potency, loss of trichomes, and harsher smoke or taste
Not Properly Drying & Curing Skipping the crucial steps of drying and curing Less flavorful and harsh smoke, and mold or mildew growth
Using the Wrong Tools Using dull or unsanitary trimming tools Compromised quality and potential for contamination
Damaging Trichomes Handling the buds roughly during harvesting or trimming process Reduced potency and flavor

It’s important to note that the timing of the harvest is crucial to the overall quality and potency of the cannabis plant. Harvesting too early can lead to a lack of potency and a reduced yield, while harvesting too late can lead to a harsher smoke and a reduced flavor. So, it’s essential to monitor the plant’s trichomes and ensure that they are fully mature before harvesting.

Additionally, proper drying and curing are essential to maximize the potency, flavor, and aroma of your cannabis buds. This process involves drying the buds slowly to reduce moisture content and curing them in airtight containers to allow the flavors and aromas to develop fully.

Finally, using the right tools and handling the buds with care during the harvesting and trimming process is vital to preserving the quality of the final product. By avoiding these common harvesting mistakes, you can ensure that you get the most out of your cannabis plants and enjoy the best possible yield and quality.

Other Common Mistakes

As you strive to cultivate high-yield cannabis plants, it’s essential to be vigilant about every stage of the process. From genetics selection to harvesting, there are many common mistakes that growers make that can seriously impact their results. In this section, we’ll cover additional common mistakes that can sabotage your success. These mistakes are often overlooked, but they can make or break a harvest. Keep reading to learn more about avoiding these pitfalls and optimizing your cannabis growth.

Not Training the Plants

One common mistake that many cannabis growers make is not properly training their plants. Training your plants can increase yields, improve the potency of your buds, and ensure that your plants grow in a healthy and manageable way.

What is plant training?

Plant training involves manipulating the growth of your cannabis plants to optimize their yield and overall health. There are a few different techniques that you can use to train your plants, including topping, pruning, and using techniques like SCROG (Screen of Green) or LST (Low Stress Training).

The benefits of plant training

By training your cannabis plants, you can increase their exposure to light and promote a more even canopy. This can lead to more consistent growth and higher yields. Additionally, training your plants can help prevent them from becoming too tall and unwieldy, which can be difficult to manage in a grow space.

Common mistakes with plant training

One common error that many growers make is not starting plant training early enough. It’s important to begin training your plants while they are still in the vegetative stage, as this is when they are most responsive to manipulation.

Another mistake is not using the right equipment or materials. For example, if you plan to use a SCROG method, you’ll need a screen to support the plants. If you’re planning to prune your plants, you’ll need sharp, sterilized scissors to prevent the spread of disease.


Plant training is an important part of maximizing the potential of your cannabis plants. By taking the time to learn more about different training techniques and committing to a consistent training schedule, you can improve the overall health and yield of your plants. Don’t neglect this important step in the growing process – your plants will thank you for it!

Common Mistakes with Plant Training
Not starting plant training early enough
Not using the right equipment or materials

Not Identifying Pests and Diseases

Identifying and treating pests and diseases is crucial for the health and yield of your cannabis plants. Failure to detect these issues early can result in stunted growth, nutrient deficiencies, and even plant death. It is important for cultivators to be able to recognize common pests and diseases that affect cannabis plants.

One common pest is spider mites. These tiny insects can be identified by their webs on the leaves and tiny white or yellow dots. They can quickly spread throughout the plant and cause it to wilt and die. The best way to prevent spider mites is to use a preventive spray and regularly inspect your plants.

Another common pest is the fungus gnat. These annoying flies often appear when the soil is too moist and can damage the roots of the plant. Yellow sticky traps can be used to catch them, and keeping the soil dry can prevent them from appearing.

Fungal infections can also occur, such as powdery mildew. This appears as a white, powdery substance on the leaves and can cause them to wilt and die. The best way to prevent fungal infections is to provide good air circulation and to avoid overwatering your plants.

By understanding and identifying pests and diseases, you can take the necessary steps to prevent and treat them. Regularly inspecting your plants and maintaining a clean growing environment can go a long way in avoiding these issues. It is important to be proactive in taking care of your cannabis plants to ensure a successful and high-yielding harvest.

Not Flushing the Plant before Harvest

As the harvest season approaches, it’s important to remember to flush your plants before harvesting them. Flushing refers to the practice of watering your plants with just plain water for a week or two before you would harvest them. This helps to remove any excess nutrients from the soil and helps to improve the overall flavor and aroma of your buds.

When you don’t flush your plants, you run the risk of having harsh-tasting buds that can be difficult to smoke or vape. This happens because the excess nutrients in the soil can cause a buildup of minerals and salts in the plant’s tissues, which can give the buds a harsh or salty taste.

If you don’t flush your plant, it might burn unevenly when you smoke it. This can lead to an unpleasant smoking experience and may even cause health problems because of the release of toxic chemicals.

To ensure a high-quality harvest, it’s important to flush your plants before you harvest them. A good flush will remove any remaining nutrients in the soil so that your plants can focus on using up the nutrients they have stored in their tissues. This will help give your buds a cleaner and smoother flavor when you smoke them.

Here are some tips to keep in mind when flushing your plants:

Tips for Flushing Your Plants
Aim to flush your plants for a period of 7-10 days before harvest.
Use plain, pH-balanced water for flushing.
Don’t overwater your plants during the flush as this can cause root rot or mold.
Monitor the pH of the water you’re using during the flush as it can affect the plant’s ability to absorb the remaining nutrients.
Stop flushing your plants a few days before you plan to harvest them to allow them to use up any remaining nutrients before they are cut down.

Remember, flushing your plants before harvest is an essential step in producing high-quality buds that are smooth and flavorful. Don’t skip this step if you want to maximize the yield and potency of your cannabis plants.


In conclusion, growing high-yield cannabis plants takes time, effort, and attention to detail. By avoiding the aforementioned mistakes, one can increase the chances of a successful harvest. It is important to choose the right strain, source quality genetics, and avoid overwatering or incorrect temperature during the germination and seedling stages. The vegging stage requires proper lighting and feeding, as well as careful attention to cuttings. Similarly, flowering should not be neglected, with proper adjustments to light schedules and environmental factors. Finally, training the plants, identifying and treating pests and diseases, and flushing the plants before harvest are all important factors to consider.

It is important to note that growing cannabis is a continuous learning process, and even experienced growers make mistakes from time to time. However, by being mindful of these common mistakes and making adjustments as needed, growers can increase their chances of a successful harvest. Remember to do research before starting and be patient throughout the process. With determination and attention to detail, growing high-yield cannabis plants can be a rewarding experience.

Frequently Asked Questions

How do I choose the right cannabis strain?

You should consider factors such as the desired effects, growing conditions, and the level of experience you have in growing cannabis.

What are the consequences of picking the wrong genetics?

Choosing the wrong genetics can lead to lower yields, lower quality buds, and other issues that can affect the overall health of the plant.

What are the risks of buying cannabis seeds from unreliable sources?

Buying from unreliable sources can lead to getting low-quality seeds, which can result in plants with lower yields, or even worse, plants that don’t grow at all.

How often should I water my cannabis plants during the germination stage?

You should water your cannabis plants just enough to keep the soil moist, but not overly wet or saturated.

What is the ideal temperature range for the seedling stage?

The ideal temperature range for the seedling stage is between 70-78°F (21-26°C).

When should I transplant my seedlings?

You should transplant your seedlings when they have grown to be around 4-6 inches tall, or after the roots have started to show through the bottom of the pot.

How much light do my marijuana plants need during the vegging stage?

Your marijuana plants need around 18-24 hours of light during the vegging stage to ensure optimal growth and yield.

What happens if I underfeed my plants during the vegging stage?

If you underfeed your plants during the vegging stage, you may end up with decreased yields, smaller buds, and weaker plants.

What are some common mistakes when taking cuttings from cannabis plants?

Some common mistakes include taking too many cuttings at once, not sterilizing your tools before cutting, and not allowing enough time for the cuttings to root before planting.

How do I flush my cannabis plants before harvesting?

You should flush your plants by watering them with only clean, pH-balanced water for the last two weeks before harvest to remove any excess nutrients and improve the overall quality of the buds.


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