How to Grow Autoflowering Cannabis Plants

Learn how to grow autoflowering cannabis plants with our guide, covering indoor and outdoor tips, lighting, fertilizers, and more for a bountiful harvest.

How to Grow Autoflowering Cannabis Plants

Successful autoflowering cannabis cultivation relies on many different elements, and this blog post will explore them in detail to provide helpful advice for indoor and outdoor growing. In this article, we'll explore the various facets of cultivating autoflowering cannabis and provide helpful hints for both indoor and outdoor settings.

Autoflowering cannabis seeds offer several benefits over their photoperiod counterparts, making them an attractive option for growers at all experience levels. We'll discuss the advantages of choosing autoflowering strains as well as potential challenges you may encounter during your journey.

From selecting a suitable location with optimal lighting and ventilation requirements to using organic fertilizers and pest control methods, our comprehensive guide on how to grow autoflowering cannabis plants will equip you with the knowledge needed for a thriving harvest. Stay tuned as we explore each step in detail throughout this informative blog post.

Table of Contents:

Benefits of Growing Autoflowering Cannabis Plants

Growing autoflowering cannabis plants has become increasingly popular among recreational growers, thanks to their unique characteristics and ease of cultivation. Cultivating autoflowering cannabis strains is an ideal choice for novice and experienced growers alike, due to their unique characteristics and ease of growth.

Fast Growth Cycle

One of the most significant benefits of growing autoflowering cannabis is its rapid growth cycle. Unlike photoperiod strains that rely on specific light cycles to trigger flowering, autoflowers begin flowering automatically, usually within 3-4 weeks from germination. You can anticipate a speedy yield from your seeds in just 8-10 weeks, making autoflowering cannabis an attractive option for those seeking rapid results.

Compact Size

The compact size of autoflowering cannabis plants makes them ideal for small-scale indoor grows or discreet outdoor gardens. Most varieties grow between 60cm to 100cm tall, allowing you to maximize your space without compromising on yield quality. Additionally, their smaller stature makes them less noticeable when grown outdoors, which could be essential if privacy is a concern.

No Need for Light Schedule Adjustments

  • Simplicity: One major advantage that sets autoflowers apart from traditional photoperiod strains is their independence from light schedules changes during different stages (vegetative and flowering). This characteristic simplifies the growing process significantly since there's no need to adjust lighting hours or install timers.
  • Versatility: The ability to flower under any light schedule also means that autoflowers can be grown alongside photoperiod strains without causing any interference. This versatility allows growers to cultivate multiple varieties simultaneously, catering to different preferences and needs.


Autoflowering cannabis plants are known for their resilience and ability to withstand various environmental conditions. Their ruderalis genetics make them more resistant to pests, diseases, and harsh weather than traditional photoperiod strains. This robustness makes autoflowers an excellent choice for outdoor growing in regions with unpredictable climates or less-than-ideal conditions.

Better Pest Control

The rapid growth cycle of autoflowering cannabis plants not only ensures a quick harvest but also helps prevent pest infestations from becoming severe issues. Since the entire lifecycle is shorter than photoperiod strains, there's less time for pests like spider mites or aphids to establish themselves on your plants before you harvest them.

Cultivating autoflowering cannabis can be a simple and gratifying process for those looking to take advantage of this adaptable herb. By following some key indoor cultivation strategies, you can get the most out of your cannabis crop while also making sure it is strong and healthy.

Indoor Growing Tips

Growing autoflowering cannabis plants indoors can be a rewarding experience, especially for those with limited space or living in areas with harsh outdoor conditions. To ensure your indoor grow is successful, follow these essential tips:

Start with Small Containers

Autoflowering strains typically have smaller root systems compared to their photoperiod counterparts. As such, it's best to start them off in small containers like solo cups or 1-gallon pots. This will prevent overwatering and allow the roots to develop properly before transplanting into larger containers if necessary.

Adequate Lighting is Key

One of the most important factors for growing healthy autoflowers indoors is providing sufficient light. Autoflowering plants thrive under LED, CFL, or HPS lights,, but LED lights are often preferred due to their energy efficiency and lower heat output. Ensure that you provide at least 18 hours of light per day during the entire growth cycle.

Maintain Proper Ventilation

To keep your indoor garden thriving and free from mold or pests, proper ventilation is crucial. Invest in a good quality oscillating fan to circulate air around your plants and consider installing an exhaust system if possible. This will help maintain ideal temperature and humidity levels while also preventing stagnant air pockets which can lead to issues like powdery mildew.

Avoid Overwatering Your Plants

  • Dry to touch: Only water your plants when the top inch of soil feels dry to the touch. Overwatering can lead to root rot and other issues.
  • Proper drainage: Ensure that your containers have adequate drainage holes to prevent excess water from sitting in the bottom of the pot.
  • Lift test: Another method for determining if it's time to water is by lifting your container; a lighter weight indicates that it's time for watering.

Growing autoflowering cannabis indoors allows you greater control over environmental factors, ensuring optimal growth conditions throughout their life cycle. Adopting these strategies will surely get you started in growing robust and powerful autoflowers inside your own residence.

Indoor growing tips can be a great way to start your cannabis-growing journey. Equipment and know-how are key to a successful start of your home cannabis cultivation. Outdoor Growing Tips provide an opportunity for more experienced growers to explore different climates and conditions that may yield better results with their plants.

Outdoor Growing Tips

Growing autoflowering cannabis plants outdoors can be a rewarding experience, as these strains thrive in natural sunlight and fresh air. To ensure your outdoor grow is successful, follow these essential tips:

Select the Right Strain

Choose an autoflowering strain that's suitable for your climate and growing conditions. Some strains are more resistant to cold or humidity than others, so research before making a decision.

Timing Is Key

To maximize yield and avoid issues with weather or pests, start planting after the last frost of spring when temperatures are consistently above 50°F (10°C). Autoflowers typically have a short life cycle of about 8-12 weeks from seed to harvest; plan accordingly to make sure they receive enough sunlight during their growth period.

Pick Your Spot Wisely

A good location with ample sunlight exposure is crucial for healthy plant development. Choose a spot where your plants will get at least six hours of direct sun daily, preferably morning light, to encourage optimal growth rates.

Nutrient-Rich Soil Matters

The quality of soil plays an important role in determining how well your autoflowering cannabis plants grow outdoors. Use nutrient-rich organic soil mixed with perlite or coco coir for proper drainage and root support. Test the pH level of the soil; it should be between 6-7 for best results.

  • Maintain Adequate Water Supply: Autoflowers require regular watering but don't tolerate overwatering well. Keep track of rainfall levels in your area and adjust your watering schedule accordingly to prevent root rot.
  • Feed Your Plants: Use organic fertilizers, such as worm castings or bat guano, to provide essential nutrients for healthy growth. Avoid overfeeding, as it can lead to nutrient burn in autoflowering strains.
  • Pest Control: Keep an eye out for pests like aphids or spider mites that can harm your plants. Employ natural pest control method, such as introducing beneficial insects like ladybugs, to keep the unwanted critters at bay.

Growing autoflowering cannabis outdoors requires careful planning and attention but offers a rewarding experience when done right. With these pointers, you can confidently embark on your journey of successful outdoor cannabis cultivation.

Outdoor growing tips can be a great way to maximize your yield and enjoy the process of cultivating cannabis plants. Selecting an appropriate location is key in order to ensure that your outdoor grow will be successful.

Selecting a Suitable Location

When it comes to growing autoflowering cannabis plants outdoors, selecting the right location is crucial for optimal growth and yield. In this section, we will discuss some key factors to consider when choosing a spot for your outdoor cannabis garden.

Sunlight Exposure

Autoflowering strains require ample sunlight to grow strong and healthy. Choose a spot that gets direct sunlight for 6-8 hours daily, preferably one facing south in the Northern Hemisphere. South-facing spots are ideal in the Northern Hemisphere, as they provide consistent sun exposure throughout the day. If you're unsure about how much sun your chosen location gets, try using a sunrise-sunset calculator or observe the area over several days before planting.

Soil Quality

The soil condition is of great importance in ascertaining the wellness and yield of plants. Autoflowering cannabis plants thrive in well-draining soil with balanced pH levels (between 6-7). You can test your soil's pH level by purchasing an affordable soil testing kit. If necessary, amend your soil with organic matter like compost or worm castings to improve its nutrient content and drainage capabilities.

  • TIP: To further enhance drainage and prevent root rot issues, consider building raised beds filled with high-quality potting mix specifically designed for cannabis cultivation.

Air Circulation & Wind Protection

Fresh air circulation is essential for maintaining plant health while preventing mold growth on buds during flowering stages. Choose an open space with natural airflow, but also consider protecting your plants from strong winds that can damage their delicate branches. You can achieve this by planting near a fence or wall, using windbreaks like tall shrubs or bamboo screens, or even placing stakes around the plant and attaching them with soft ties for support.

Privacy & Security

Although cannabis cultivation is becoming more accepted in many places worldwide, it's still essential to maintain privacy and security when growing outdoors. Select a discreet location away from prying eyes and potential thieves. This could mean choosing an area hidden behind trees or bushes, utilizing camouflage netting over your garden bed, or installing motion-activated lights to deter intruders.

Selecting a suitable location for your autoflowering cannabis plants is essential to ensure their health and growth. With the right lighting and ventilation, you can create an optimal environment that will help them thrive.

Lighting and Ventilation Requirements

In this section, we will discuss the ideal conditions for these two essential factors.

Choosing the Right Lighting

The most important aspect of indoor cannabis cultivation is ensuring your plants receive adequate light. Autoflowering strains require a specific amount of light to trigger their rapid growth cycle. The general recommendation is to provide at least 18 hours of light per day during their entire life cycle, with some growers even opting for a continuous 24-hour schedule.

When it comes to grow lights, there are many different types available with varying benefits and drawbacks. Some popular options include:

  • CFL (Compact Fluorescent Light): These energy-efficient bulbs are affordable and easy to find but may not provide enough intensity for larger grows or higher yields.
  • HID (High-Intensity Discharge) Lights: Both Metal Halide (MH) and High-Pressure Sodium (HPS) lamps fall under this category. They offer high-intensity lighting suitable for bigger grows but can generate excessive heat that requires proper ventilation systems in place.
  • LED Grow Lights: A more expensive option initially, LED lights consume less power than other types while still providing ample intensity needed by autoflowers throughout their lifecycle. Additionally, they produce less heat compared to HID lights which makes them an excellent choice if you're looking to minimize temperature fluctuations within your grow space.

Ventilation and Air Circulation

Proper ventilation is essential for maintaining a healthy environment for your autoflowering cannabis plants. Good air circulation helps prevent mold, mildew, and pests while also regulating temperature and humidity levels within the grow space.

To achieve optimal airflow in your indoor garden, consider implementing the following:

  • Exhaust Fan: An exhaust fan helps remove hot air from your grow room while bringing in fresh cool air. This process aids in controlling temperatures and ensuring adequate carbon dioxide (CO2) supply to promote photosynthesis.
  • Oscillating Fans: These fans help distribute fresh air evenly throughout the grow space, preventing stagnant pockets of humid or warm air that can lead to mold growth or other issues. Make sure not to point them directly at your plants as this could cause wind stress or damage delicate foliage.
  • Air Filters: Installing an activated carbon filter will help eliminate any unwanted odors produced by flowering cannabis plants. Additionally, it can aid in trapping airborne pathogens before they reach your precious crop.

Lighting and ventilation requirements are essential for successful autoflowering cannabis growth. It is critical to comprehend these two components in order to attain the most productive and superior harvest. Organic fertilizers and pest control can further enhance the growing process, so let's explore those topics next.

Organic Fertilizers and Pest Control

These methods not only contribute to healthier plants but also ensure that your final product is free from harmful chemicals. In this section, we will explore how organic fertilizers and natural pest control methods can help produce healthier plants while avoiding the use of chemicals.

The Benefits of Organic Fertilizers

Organic fertilizers are derived from natural sources such as animal manure, compost, or worm castings. They provide essential nutrients for your cannabis plants while improving soil structure and promoting beneficial microorganisms' growth. Some advantages of using organic fertilizers include:

  • Sustainable: Organic fertilizers are environmentally friendly as they do not harm ecosystems or pollute water sources like synthetic chemical alternatives.
  • Better Soil Health: By adding organic matter to the soil, you improve its structure which in turn helps retain moisture and nutrients more effectively.
  • Promotes Microbial Life: Beneficial microbes play a crucial role in breaking down complex compounds into simpler forms that can be absorbed by plant roots.

Tips for Using Organic Fertilizer with Autoflowering Cannabis Plants

  1. Mix well-aged compost or other high-quality organic material into your planting site before transplanting seedlings or seeds.
  2. Add slow-release granular fertilizer during the vegetative stage; this ensures a steady supply of nutrients throughout the growing cycle without overloading young plants.
  3. Avoid excessive nitrogen levels during flowering since it may result in reduced bud production.
  4. Consider using organic liquid fertilizers like fish emulsion or seaweed extract for a quick nutrient boost when needed.

Natural Pest Control Methods

Pests can be a significant concern for outdoor cannabis growers, but there are several natural methods to protect your autoflowering plants without resorting to harmful chemicals. Here are some effective strategies:

  • Companion Planting: Grow other plants alongside your cannabis that either repel pests or attract beneficial insects. For example, marigolds deter aphids and whiteflies while attracting ladybugs that prey on them.
  • Diatomaceous Earth (DE): DE is a non-toxic powder made from crushed fossilized algae; it works by damaging the exoskeletons of insects, causing dehydration and death. Sprinkle around the base of your plants as a barrier against crawling pests such as ants and slugs.
  • Biological Controls: Introduce beneficial predators like ladybugs, lacewings, or predatory mites into your garden to help control pest populations naturally.
  • Horticultural Oils & Neem Oil: These natural oils work by smothering insect eggs and disrupting their life cycle. They can be applied directly onto affected areas with minimal risk to humans or pets.

Organic fertilizers and pest control are essential for a successful autoflowering cannabis grow. When it comes to the challenges of growing these plants, knowledge is key.

Challenges of Growing Autoflowering Cannabis Plants

While autoflowering cannabis strains offer numerous benefits, they also come with their own set of challenges. Growers may experience certain difficulties when cultivating autoflowering cannabis plants, and this article provides advice on how to tackle these issues.

Smaller Yields

The most common challenge faced by growers is the smaller yield produced by autoflowering strains compared to photoperiod plants. Due to their rapid growth cycle and compact size, these plants typically produce less harvestable material than traditional varieties. However, you can still maximize your yields by:

  • Maintaining optimal growing conditions such as proper lighting, temperature, and humidity levels.
  • Providing adequate nutrients through organic fertilizers or specially formulated nutrient solutions for cannabis.
  • Growing multiple crops in succession throughout the year due to their shorter life cycle.

Sensitivity to Stressors

Autoflowering cannabis plants are more sensitive to stressors like overwatering or excessive pruning due to their short vegetative phase. This means that any mistakes made during cultivation could have a significant impact on plant health and final yield. To minimize stress on your autoflowers:

  • Avoid transplant shock by starting seeds in their final containers or using biodegradable pots that can be planted directly into the soil without disturbing roots.
  • Maintain a consistent watering schedule while being careful not to overwater or underwater your plants - use moisture meters if necessary for accuracy.
  • Avoid excessive pruning , as autoflowers have limited time to recover from stress during their short life cycle.

Less Potency and Variation in Phenotypes

Some growers argue that autoflowering strains are less potent than their photoperiod counterparts, although this is becoming less of an issue as breeders continue to develop stronger autoflowering varieties. Additionally, there can be more variation in phenotypes within a single strain due to the genetic diversity introduced by ruderalis genes. To ensure you get the best possible results:

  • Purchase seeds from reputable seed banks or breeders who offer high-quality genetics with consistent traits.
  • Consider growing multiple plants from different strains or even combining both autoflowers and photoperiod plants for a diverse harvest.
  • Maintain optimal environmental conditions throughout your grow space to encourage healthy growth and maximum potency.

Growing autoflowering cannabis plants can be rewarding but also presents unique challenges compared to traditional photoperiod varieties. By understanding these potential difficulties and implementing appropriate strategies, you can successfully cultivate thriving auto-flowering crops with satisfying yields and potency levels.

Frequently Asked Questions How to Grow Autoflowering Cannabis Plants

What is the secret to growing Autoflowers?

The secret to growing autoflowering cannabis plants lies in providing optimal environmental conditions, including consistent lighting (18-24 hours per day), well-draining soil with proper nutrients, and maintaining a stable temperature between 20-28°C. Regularly monitoring plant health and using organic fertilizers or pest control methods can also contribute to successful growth.

How hard is it to grow autoflower cannabis?

Growing autoflower cannabis is relatively easy compared to photoperiod strains due to their shorter life cycle and resilience. However, they require attention in terms of light exposure, nutrient management, and environmental control. Beginners may face some challenges but can achieve success with proper research and guidance.

What is the best way to plant Autoflowers?

The best way to plant autoflowers involves starting seeds directly in their final containers filled with well-draining soil mixtures rich in nutrients. This method minimizes transplant shock as these plants have a short vegetative stage. Ensure adequate spacing for airflow around each plant while maintaining ideal temperature, humidity levels, and lighting conditions.

What is the average yield for Autoflower?

The average yield for an autoflowering cannabis plant varies depending on factors like strain genetics, growing environment, care provided during cultivation process; however typically ranges from 30g -150g per plant indoors & up-to 200g outdoors when grown under favorable conditions.


Overall, growing autoflowering cannabis plants can be a rewarding experience for those who enjoy cultivating their own marijuana. With the right knowledge and tools, anyone can successfully grow these plants indoors or outdoors. From selecting a suitable location to providing proper lighting and ventilation, organic fertilizers and pest control methods - there are many factors to consider when it comes to How to Grow Autoflowering Cannabis Plants.