Here are some answers to the questions we see most often:
How long will my autoflowering seeds last?
Properly stored autoflowering cannabis seeds can remain viable for 2-5 years or longer.
How should I store my autoflowering seeds?
To maintain viability, autoflowering cannabis seeds should be stored in a cool, dark place. An ideal storage temperature is under 70°F, and keeping seeds in an airtight container will prevent moisture loss. Refrigeration can help extend seed lifespan even further if sealed against condensation.
Are Autoflowering Seeds Feminized?
Yes, you can get autoflowering cannabis seeds that are feminized. All of the autoflower seeds we stock here at WeedSeedsExpress are feminized. Feminized seeds produce only female plants, which contain high levels of THC and other cannabinoids. Autoflowering seeds automatically start flowering after 3-4 weeks regardless of light cycle.
Are autoflowering seeds always female?
No, autoflower seeds are not guaranteed to be female. All of the Autoflower seeds we stock here at WeedSeedsExpress are feminized, which means that any risk of male plants is removed. That means all our growers have peace of mind knowing that all their autoflower plants will flower as productive, bud-producing females. This saves gardeners the hassle, wasted effort and reduced yields caused by unwanted male autos that don't generate any usable cannabis.
Are autoflowers less potent?
Autoflower potency used to lag behind photoperiod varieties, but breeding efforts have greatly closed the gap. When comparing autoflower and photoperiod versions of the same strain, autoflowers may still test slightly lower in THC due to their cannabis ruderalis heritage. However, many exceptionally potent autoflowering cannabis strains now exist that surpass some photoperiod varieties. It depends primarily on each strain's unique genetics. By carefully selecting THC-maximized autoflower seeds and consulting their lab test results, growers can easily find autoflower options with 20%+ THC that outclass other non-autoflowering marijuana strains in potency.
Can autoflowers produce seeds?
Yes, autoflower plants can produce seeds if they are pollinated. If you want to prevent seed production, always start with feminized autoflower seeds rather than regular autoflower seeds. Feminized autoflower seeds eliminate the possibility of male autoflower plants that could pollinate female autoflower plants. If you're growing with female-only autoflower plants, seed formation due to male pollination is impossible.
However, unintended stress can cause female autoflowers to become hermaphrodites and could still result in some seed production through self-pollination. But the risk is vastly reduced with the female-only genotype of feminized autoflower seeds. As long as you provide a low-stress environment for your all-female crop grown from top-shelf feminized autoflower seeds, they will reliably harvest seedless and top-quality buds.
Can autoflowers be grown outdoors?
Autoflowers are great for outdoor cultivation(even for beginners). Simply choose a mold-resistant auto strain suited for your climate, plant in full sun after your last spring frost in rich soil, then provide adequate watering through summer but avoid heavy overwatering. With proper preventative care taken against pests and mold, auto strains will transition themselves to flower and finish their life cycle, letting you harvest by late summer or early fall. Key outdoor advantages are their natural resilience, discrete size, and not requiring light cycle adjustments.
How do you water Autoflowering strains?
Use water with low mineral content for autoflowers - distilled, reverse osmosis or demineralized water is best. If using tap water, let it sit out 24 hours and check that the pH is between 6.3-6.8. Avoid highly alkaline/acidic water. Aim for moderate total dissolved solids (TDS) of 50-150ppm. Check the drainage water's TDS to ensure nutrients aren't building up too much.Be careful not to overwater, as this causes nutrient lockout and root rot. Let the soil dry out between waterings.
Can autoflowering seeds be grown indoors?
Yes, autoflower seeds can be grown indoors. In fact, many marijuana growers choose to cultivate autoflowers indoors because it allows full control over the plants' environment. Because autoflowers tend to be smaller, compact plants, they are well-suited for indoor grows where space might be limited.
Are autoflowering seeds smaller?
Autoflower seeds are not inherently smaller than regular or feminized cannabis seeds. Seed size is dependent on the specific strain, not the flowering type. Some autoflower strains may have smaller seeds, while others can be larger, just like photoperiod strains. Autoflower plants themselves tend to be smaller than those grown from regular or feminized seeds. This is because autoflowers have a predetermined life cycle that ends in flowering after a certain period of time, regardless of light exposure.
Can autoflowers be topped?
Yes, you can top autoflower plants. However, we advise waiting until you have some growing experience before trying this high-stress training technique. Topping autoflowers incorrectly can stunt them, resulting in a smaller yield. For beginner autoflower growers, it's generally best not to top on your first few grows. Once you have a solid understanding of the autoflower life cycle and how the plants grow, topping can be incorporated to control height and increase yields.
What Kind of Nutrients Do Autoflowering Varieties Need?
Autos generally have higher nutrient needs than photoperiod plants since they grow and flower so quickly.
Here are some of the key nutrients that autoflower strains require:
- Nitrogen (N) - Supports healthy green growth and influences yield size. Deficiencies cause leaves to yellow.
- Phosphorus (P) - Critical for root, flower, and bud development. Boost levels during flowering.
- Potassium (K) - Important for overall plant health and resilience to mold and disease. Helps buds bulk up.
- Calcium & Magnesium - Help regulate nutrient intake and support strong cell walls/stems.
- Micronutrients - Iron, manganese, boron, zinc, copper etc. Aid photosynthesis, enzyme production, and other growth processes
Use an autoflower-specific nutrient line if possible. These are specially formulated for the faster growth rate and life cycle of autoflowers. Popular options include Advanced Nutrients and General Hydroponics Flora Series.
What is the Perfect Humidity and Temperature for Autos?
Temperature - Auto plants grow best with daytime temperatures of 70-85°F (21-29°C) and nighttime temps around 65-70°F (18-21°C). Avoid exposing them to temperatures below 50°F (10°C) or frequent temperature fluctuations.
Humidity - Ideal humidity levels are 40-50%. Lower humidity can cause buds to dry out, while higher humidity increases risks of mold, fungi, and pests. Use a humidifier or pebble tray to maintain a steady humidity at around 50%.