The Ultimate Guide to Growing Autoflowering Cannabis Seeds in the UK


Autoflowering cannabis seeds have revolutionized the way people grow marijuana. These seeds are known for their ability to flower automatically, regardless of the light cycle they receive. This makes them perfect for beginners and those with limited space or time. In this ultimate guide, we will explore everything you need to know about growing autoflowering cannabis seeds in the UK.

The Benefits of Growing Autoflowering Cannabis Seeds

Shorter Growth Cycle

One of the main advantages of growing autoflowering cannabis seeds is their shorter growth cycle. Unlike photoperiod strains that require specific light schedules to trigger flowering, autoflowers will start flowering on their own after a certain period of time. This means you can harvest your plants much faster, allowing for multiple grows within a year.

Compact Size

Autoflowering cannabis plants tend to be smaller in size compared to photoperiod strains. This makes them ideal for growers with limited space or those who want to keep their cultivation discreet. Whether you have a small balcony or a tiny closet, autoflowers can thrive in tight spaces.

Resilient and Easy to Grow

Autoflowering cannabis seeds are known for their resilience and ease of cultivation. They are generally more forgiving when it comes to environmental fluctuations and beginner mistakes. Even if you’re new to growing cannabis, you can still achieve great results with autoflowers.

Outdoor Versatility

Autoflowering cannabis seeds are also well-suited for outdoor cultivation in the UK. Since they don’t rely on specific light cycles, they can be grown successfully during summer months when daylight hours are longer. This allows outdoor growers to maximize their yields without worrying about light pollution or strict schedules.

Choosing the Right Autoflowering Cannabis Seeds

When it comes to choosing the right autoflowering cannabis seeds in the UK, there are a few factors to consider:

Genetics and Strain Selection

Just like photoperiod strains, autoflowering cannabis seeds come in a variety of genetic backgrounds and strains. Each strain has its own unique characteristics, such as flavor, potency, and growth patterns. Research different strains and choose one that aligns with your preferences and growing conditions.

Seed Banks

Ensure you purchase your autoflowering cannabis seeds from reputable seed banks in the UK. Look for banks with positive reviews, good customer service, and a wide selection of strains. This will help ensure the quality and authenticity of the seeds you receive.

Feminized Seeds

For hassle-free cultivation, it’s recommended to choose feminized autoflowering cannabis seeds. These seeds are genetically modified to produce only female plants, eliminating the need to identify and remove male plants during the flowering stage.

Setting Up Your Grow Space

Indoor Growing

If you’re planning to grow autoflowering cannabis seeds indoors, you’ll need to set up a suitable grow space. Here are some key considerations:

  • Lighting: Autoflowers can be grown under different types of lighting systems, including LED grow lights or high-intensity discharge (HID) lamps. Choose a lighting system that suits your budget and energy efficiency needs.

  • Grow Medium: Select a grow medium that provides good drainage and retains moisture evenly. Popular options include soil, coco coir, or hydroponics.

  • Ventilation: Proper air circulation is crucial for healthy plant growth. Install exhaust fans or ventilation systems to maintain optimal temperature and humidity levels in your grow space.

  • Nutrients: Autoflowers have specific nutrient requirements during different stages of growth. Invest in high-quality fertilizers designed for cannabis cultivation or consider organic alternatives.

  • Outdoor Growing

    For those planning to grow autoflowering cannabis white widow strain seeds seeds outdoors in the UK, here are some tips:

  • Climate Considerations: The UK climate can be challenging for cannabis cultivation due to its variable weather conditions. Choose autoflowering strains that are known for their resilience to colder temperatures and shorter growing seasons.

  • Sunlight Exposure: Select a location in your garden that receives maximum sunlight throughout the day. Avoid areas with excessive shade or obstructions that may limit light exposure.

  • Pest and Disease Prevention: Take necessary precautions to protect your plants from common pests and diseases. Regularly inspect your plants, use organic pest control methods, and ensure proper air circulation to prevent mold and mildew.

  • Germination and Seedling Stage

    Germination Methods

    There are several methods you can use to germinate autoflowering cannabis seeds:

  • Paper Towel Method: Place your seeds between damp paper towels and keep them in a warm, dark place. Check the towels regularly to ensure they remain moist but not soaked. Within a few days, the seeds should sprout taproots.

  • Direct Planting: Plant your seeds directly into small pots filled with moist soil or other preferred grow medium. Ensure the soil is loose enough for the taproot to penetrate easily.

  • Caring for Seedlings

    Once your seeds have germinated and seedlings have emerged, it’s important to provide them with optimal care:

  • Lighting: Place your seedlings under appropriate lighting systems to ensure they receive adequate light intensity for healthy growth. Adjust the height of the lights as the seedlings grow taller.

  • Watering: Water your seedlings gently, ensuring that the soil remains evenly moist but not waterlogged. Avoid overwatering as it can lead to root rot or other issues.

  • Nutrients: Start feeding your seedlings with a diluted nutrient solution once they develop their first set of true leaves. Follow the recommended dosage instructions provided by the manufacturer.

  • Vegetative Stage and Flowering

    Vegetative Growth

    During the vegetative stage, your autoflowering cannabis plants will focus on developing a strong root system and lush foliage. Here’s what you need to know:

  • Lighting: Provide your plants with at least 18 hours of light per day during the vegetative stage. This can be achieved using artificial lighting or by placing them in a sunny outdoor location.

  • Training Techniques: Although autoflowers have a predetermined life cycle, you can still use low-stress training (LST) techniques to improve light penetration and promote bushier growth. This involves gently bending and tying down branches to create a more even canopy.

  • Nutrient Requirements: Autoflowers have specific nutrient requirements during the vegetative stage. Use a balanced fertilizer with higher nitrogen levels to promote healthy leaf development and overall plant vigor.

  • Flowering Stage

    Autoflowering cannabis plants will begin flowering automatically after a certain period of time, usually around 2-4 weeks from germination. Here are some tips for the flowering stage:

  • Lighting: Reduce the light cycle to 12 hours of uninterrupted darkness and 12 hours of light per day to trigger flowering. Ensure that your plants receive complete darkness during their designated dark period.

  • Bud Development: As your plants transition into the flowering stage, you’ll notice the formation of small buds that will gradually increase in size and density. Monitor their progress closely and provide support if necessary.

  • Nutrient Switch: Adjust your nutrient regimen during the flowering stage to provide the appropriate balance of phosphorus, potassium, and other essential elements for bud development. Follow the manufacturer’s instructions for specific dosage recommendations.

  • Harvesting and Curing

    Harvest Timing

    Knowing when to harvest your autoflowering cannabis plants is crucial for obtaining optimal potency and flavor profiles:

  • Trichome Development: Monitor the trichomes (resin glands) on your plants using a magnifying glass or jeweler’s loupe. Harvest when the majority of trichomes have turned milky white or amber in color.

  • Pistil Color: Pay attention to the color of the pistils (hairs) on the buds. When they have mostly darkened and curled inwards, it’s a sign that your plants are nearing maturity.

  • Curing Process

    Properly curing your harvested buds is essential for enhancing their flavor, aroma, and overall quality:

  • Drying: Hang your trimmed buds upside down in a dark and well-ventilated area with moderate humidity levels. Maintain temperatures between 60-70°F (15-21°C) and allow the buds to dry slowly over 7-10 days.

  • Curing Containers: Once your buds are dry, transfer them to airtight glass jars or other suitable containers. Open the jars daily for the first week to release excess moisture, then gradually reduce the frequency over several weeks.

  • Storage Conditions: Store your cured buds in a cool, dark place away from direct sunlight and excessive heat or moisture. This will help preserve their potency and freshness for an extended period.

  • FAQs

  • Are autoflowering cannabis seeds suitable for beginners? Yes, autoflowering cannabis seeds are perfect for beginners due to their resilience and ease of cultivation.

  • How long does it take to grow autoflowering cannabis seeds in the UK? The average growth cycle for autoflowers is around 8-12 weeks from germination to harvest.

  • Can I grow autoflowering cannabis seeds outdoors in the UK? Yes, autoflowers can be successfully grown outdoors in the UK during summer months when daylight hours are longer.

  • Do autoflowering cannabis seeds require a specific light schedule? No, autoflowers flower automatically regardless of the light cycle they receive.

  • Are there any drawbacks to growing autoflowering cannabis seeds? Autoflowers tend to have lower THC levels compared to photoperiod strains. However, their faster growth cycle and ease of cultivation often make up for this.

  • Can I clone autoflowering cannabis plants? Technically, you can clone autoflowering cannabis plants, but it’s not recommended as they have a limited vegetative stage and may not root as easily as photoperiod clones.

  • Conclusion

    Growing autoflowering cannabis seeds in the UK offers a convenient and rewarding experience for both beginners and experienced growers. With their shorter growth cycle, compact size, and resilience, autoflowers are a great choice for those looking to maximize their yields in limited space or time. By choosing the right strains, setting up your grow space correctly, providing optimal care throughout each stage of growth, and properly harvesting and curing your buds, you can achieve impressive results with autoflowering cannabis seeds. Happy growing!