Cannabis Cultivation

How to Grow Large Autoflowers: Your Secret Guide to Huge Yields

image is a guide on growing large autoflowers


Are you excited about growing your own cannabis but worried about the size of your autoflowers? Well, fret not! Growing large autoflowers is not as tricky as it seems. With the right tips and tricks, you can achieve huge, bountiful buds that will make you proud. This guide will walk you through everything you need to know to get your harvest on and grow large autoflowers.

What Are Autoflowers?

Image of large growing autoflowering cannabis plants

First things first, let’s talk about what autoflowers are. Autoflowering cannabis plants start to flower based on their age, not the light cycle. This means they begin to flower automatically, usually within 2-4 weeks from planting. They’re great for beginners because they’re easier to grow and often faster to harvest. However, getting them to grow large can be a bit of a challenge.

How to Get Huge Autoflowers?

illustrate the detailed steps and techniques for achieving large autoflowers

Getting huge autoflowers requires a combination of the right techniques and some patience. Here’s a step-by-step guide:

1. Choose the Right Seeds

Start with quality seeds. Some autoflower strains are known to grow bigger than others. Look for strains that are specifically bred for size and yield.

2. Use Bigger Pots

Yes, autoflowers do grow bigger in bigger pots. Aim for at least 5-gallon pots. The more space the roots have, the larger your plant can get.

3. Optimal Light

Light is crucial for the growth of your autoflowers. Use high-quality LED or HPS lights and ensure your plants get at least 18 hours of light each day.

4. Proper Nutrients

Feed your plants the right nutrients. Autoflowers need a balanced diet of nitrogen, phosphorus, and potassium. Don’t overdo it, though. Too many nutrients can harm your plants.

5. Watering

Water your plants properly. Let the soil dry out between watering. Overwatering can stunt growth and lead to root rot.

6. Training Techniques

Low-Stress Training (LST) can help maximize your yields. Gently bend and tie down the main stem and branches to allow more light to reach the lower parts of the plant.

What Makes Autoflower Buds Bigger?

visual focuses on the essential elements for achieving those large, resin-filled buds

Bigger buds are the dream of every cannabis grower. Here’s what you can do to get those chunky, resin-filled buds:

1. Genetics

Genetics play a huge role in the size of your buds. Choose strains known for producing large buds. Some popular strains include Northern Lights Auto, Amnesia Haze Auto, and Blue Dream Auto.

2. Light Intensity

The more light your plants get, the bigger your buds will be. Ensure your plants are getting plenty of light, especially during the flowering stage.

3. Nutrient Boost

During the flowering stage, your plants need more phosphorus and potassium. Use bloom nutrients to give your plants the boost they need to produce bigger buds.

4. Environmental Control

Keep your growing environment optimal. This means maintaining the right temperature, humidity, and airflow. Too hot or too cold can stress your plants and reduce bud size.

What Autoflower Produces the Biggest Buds?

This visual highlights the top autoflower strains known for their large, resinous buds

If you’re looking for the autoflower strains that produce the biggest buds, here are some top contenders:

1. Northern Lights Auto

This strain is famous for its big, dense buds and high yields. It’s also very easy to grow, making it perfect for beginners.

2. Amnesia Haze Auto

Known for its large buds and potent effects, Amnesia Haze Auto is a favorite among many growers. It has a longer flowering time but the wait is worth it.

3. Blue Dream Auto

Blue Dream Auto produces large, resinous buds and has a high yield. It’s a bit more challenging to grow but the results are spectacular.

Do Autoflowers Grow Bigger in Bigger Pots?

This visual emphasizes the importance of using larger pots for optimal plant growth and bigger buds

Absolutely! Autoflowers benefit from having more space for their roots to grow. Using bigger pots allows the roots to spread out and take up more nutrients and water, leading to bigger plants and larger buds. Aim for at least a 5-gallon pot to give your plants the room they need to grow large.

How Do You Grow Super Autoflowers?

 This visual highlights the advanced techniques and optimal conditions for growing super autoflowers

Growing super autoflowers means maximizing every aspect of your growing process. Here’s how:

1. Start with Quality Genetics

Choose strains that are known for their size and yield.

2. Optimal Environment

Maintain the right temperature and humidity. Autoflowers thrive in temperatures between 68-77°F (20-25°C) and humidity levels around 50-60% during the vegetative stage and 40-50% during the flowering stage.

3. High-Quality Light

Use the best lights you can afford. LEDs and HPS lights are great options.

4. Proper Feeding

Use the right nutrients and follow a feeding schedule. Don’t overfeed but ensure your plants get all the nutrients they need.

5. Training Techniques

Use LST to help your plants grow more buds. This technique can significantly increase your yield.

Why Are My Autoflowers Not Getting Tall?

This visual highlights potential issues that can stunt the growth of autoflowers

If your autoflowers aren’t getting tall, it could be due to several reasons:

1. Genetics

Some strains are naturally shorter. Check the strain information to see if it’s a dwarf variety.

2. Light

Ensure your plants are getting enough light. Autoflowers need at least 18 hours of light per day to grow properly.

3. Nutrients

Ensure your plants are getting the right nutrients. Lack of nutrients can stunt growth.

4. Overwatering

Overwatering can lead to root rot and stunt your plant’s growth. Let the soil dry out between watering.

5. Temperature and Humidity

Keep the temperature and humidity at optimal levels. Too much heat or humidity can stress your plants and stunt their growth.


Q: How often should I water my autoflowers?

A: Water when the top inch of soil is dry. Avoid overwatering to prevent root rot.

Q: Can I grow autoflowers indoors and outdoors?

A: Yes, autoflowers can be grown both indoors and outdoors. Just ensure they get enough light.

Q: What’s the best soil for growing autoflowers?

A: Use a light, well-draining soil mix. Avoid heavy soils that retain too much water.

Q: How long do autoflowers take to grow?

A: Most autoflowers are ready to harvest in about 8-12 weeks from planting.

Q: Can I use regular cannabis nutrients for autoflowers?

A: Yes, but start with a lower dosage and adjust as needed. Autoflowers are more sensitive to nutrients than photoperiod plants.

Pros and Cons of Growing Autoflowers

This visual illustrates the advantages and disadvantages of growing autoflowers, along with the specifications for optimal growth


  • Fast Growing: Autoflowers are usually ready to harvest in about 8-12 weeks.
  • Easy to Grow: They require less maintenance and are more resilient to pests and diseases.
  • Compact Size: Perfect for small growing spaces.


  • Lower Yield: Generally, autoflowers produce less yield compared to photoperiod plants.
  • Less Control: Since they flower automatically, you have less control over the vegetative and flowering stages.


  • Ideal Temperature: 68-77°F (20-25°C)
  • Humidity: 50-60% (vegetative), 40-50% (flowering)
  • Light Schedule: 18/6 (18 hours light, 6 hours dark)
  • Pot Size: At least 5 gallons
  • Nutrients: Balanced diet of nitrogen, phosphorus, and potassium


Growing large autoflowers is definitely achievable with the right knowledge and techniques. By following the steps outlined in this guide, you’ll be well on your way to enjoying a bountiful harvest of huge, resinous buds. Remember, it all starts with good genetics and a bit of patience. Happy growing!


Secret Tips for Growing Huge Autoflowers

While the guide above covers the essentials, there are some insider tips that can take your autoflower growing game to the next level. Here are some additional tricks that seasoned growers use to maximize their yields and grow those monster autoflowers:

1. Use Mycorrhizal Fungi

This visual showcases advanced techniques and the use of mycorrhizal fungi to boost plant growth and yield

Mycorrhizal fungi form a symbiotic relationship with your plant’s roots, helping them absorb nutrients more efficiently. Adding mycorrhizal inoculants to your soil can boost your plant’s growth and yield.

2. Supplement with CO2

This visual highlights the use of CO2 supplementation to enhance plant growth and yield in an advanced indoor cannabis grow room

Supplementing your grow room with carbon dioxide (CO2) can significantly increase your plant’s growth rate. Plants use CO2 during photosynthesis, and higher levels can lead to faster growth and bigger buds. However, managing CO2 levels requires careful monitoring and the right equipment.

3. Foliar Feeding

This visual showcases the process of spraying nutrient solutions onto the leaves of autoflowering cannabis plants

Foliar feeding involves spraying nutrient solutions directly onto the leaves. This can be a quick way to address nutrient deficiencies and boost plant health. Be sure to do this during the early morning or late evening to avoid leaf burn.

4. Root Zone Heating

This visual emphasizes the use of heating mats to maintain an optimal temperature for root development in autoflowering cannabis plants

Keeping the root zone warm can promote faster growth, especially in colder climates. Using heating mats under your pots can help maintain an optimal temperature for root development.

5. Advanced Training Techniques

This visual showcases the use of LST, SCROG, and Super Cropping techniques to maximize light exposure and increase yields in autoflowering cannabis plants

In addition to Low-Stress Training (LST), you can use techniques like Screen of Green (SCROG) or Super Cropping to maximize light exposure and encourage more bud sites. These techniques can be a bit more advanced but can significantly increase your yields.

6. Proper pH Management

This visual emphasizes the importance of maintaining correct pH levels for optimal nutrient uptake in autoflowering cannabis plants

Ensuring that your soil or hydroponic solution has the correct pH level is crucial for nutrient uptake. For soil, aim for a pH of 6.0-6.5. For hydroponics, a pH of 5.5-6.0 is ideal. Regularly check and adjust the pH to keep your plants healthy.

7. Silica Supplements

This visual showcases the benefits of silica supplementation for autoflowering cannabis plants, emphasizing their robust health and structure

Silica strengthens plant cell walls, making your plants more resilient to stress, pests, and diseases. It can also improve the overall structure of the plant, leading to larger buds. Adding silica supplements to your nutrient regimen can provide these benefits.

8. Defoliation

This visual emphasizes the importance of maintaining correct pH levels for optimal nutrient uptake in autoflowering cannabis plants.

Strategic defoliation can help increase light penetration to lower bud sites, promoting bigger and more even growth. Be careful not to overdo it, as removing too many leaves can stress your plants.

9. Use High-Quality Water

This visual highlights the importance of using filtered or distilled water at room temperature to ensure the health and optimal growth of autoflowering cannabis plants

Water quality can greatly impact plant health. Use filtered or distilled water to avoid contaminants that can harm your plants. Ensure that the water is at room temperature to prevent shocking the roots.

10. Beneficial Insects

This visual highlights the use of ladybugs and predatory mites for natural pest control in an indoor cannabis grow room

Introducing beneficial insects like ladybugs or predatory mites can help control pests naturally. This is a great way to keep your grow environment healthy without using harsh chemicals.

By incorporating these secret tips into your growing routine, you can push your autoflowers to their full potential and enjoy an even more impressive harvest.

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