The Short Version
When you shop for fem autoflower seeds, judge the seller before you judge the strain name. A listing worth your money states the breeder, confirms in writing that the seeds are both feminized and autoflowering, gives a day range from sprout to harvest, names the parent line, and spells out a germination policy. If the page shows only glossy bud photos and the word auto, that is an ad, not a listing. Buy from a source that stores seed cool and dark, ships in line with your state rules, and can answer a question about the breeder before you pay. Everything below is a filter you can run in about five minutes.
how many autoflowers per square foot
What to Check Before You Add to Cart
- Sex type and auto trait stated plainly. Feminized means the seed was produced to express female flowers. Autoflowering means the plant flowers on age rather than a light change. You want both words on the product page, not inferred from the strain name.
- Named breeder and line. A breeder plus a generation note (F1, F4, S1) tells you how uniform the plants will be. White label seed with no origin is a lottery ticket.
- Seed to harvest window in days. Look for a range counted from sprout, not from your order date. A realistic range keeps your tent and your outdoor season out of trouble.
- Germination policy. Reputable sellers state a replacement policy and a deadline. Read it before you soak anything.
- Freshness and storage. Ask when the lot was harvested. Seed held cool, dark, and dry keeps vigor far longer than seed sitting in a warm warehouse.
- Lot or lab documentation. A lot number or test note gives you a paper trail if the pack underperforms.
- Shipping compliance. Confirm the seller ships to your state under its rules and packs discreetly.
Parameter Bands to Compare
Use these ranges as a screen, then read the breeder notes for the specific line you want.
High Yield Autoflower Seeds: A Practical Guide
- Full cycle: most autos finish 70 to 100 days from sprout. Fast lines land near 65 to 75 days. Big yielding lines run 90 to 110 days.
- Flowering window: about 7 to 11 weeks after the plant shows sex, with most indoor runs at 8 to 10 weeks.
- Light schedule: 18 to 20 hours of light per day across the whole cycle is the common indoor approach. Autos will also flower under 12/12, but yield drops.
- Height: small autos finish 12 to 24 inches, mid size plants 24 to 40 inches, and large autos pass 40 inches under strong light.
- Container size: 3 to 5 gallon pots for most indoor autos. Smaller pots stunt the plant, much larger pots can slow the start.
- THC and CBD: many modern THC autos test in the mid teens to mid twenties percent. CBD autos sit in a lower THC range with meaningful CBD, so read the label if that matters to you.
- Pack size: singles suit a test run, 3 and 5 packs suit a full tent, and 10 packs lower your cost per seed while committing you to one line.
Pitfalls That Waste a Cycle
- Fast photos sold as autos. Some sellers label short photoperiod lines as autoflowering. If the page mentions flipping to 12/12 to trigger bloom, it is not an auto.
- Unstable auto crosses. When an auto is crossed back to a photoperiod plant and not worked further, you can get plants that never flower on their own or that stretch for months.
- Guaranteed yield claims. No seller controls your light, temps, or root space. Treat any fixed gram number as marketing.
- Prices that look too good. Cheap bulk seed with no breeder name often means unknown parentage and poor storage.
- No germination terms. If the policy is missing from the page, assume there is none.
- Storage mistakes on your end. Heat, humidity, and a sunny shelf kill seed faster than any shipping delay. Keep the pack sealed, cool, and dark until planting.
- Cloning autos. A cutting from an auto stays on the mother plant clock, so clones finish small. Plan on seed runs instead.
FAQ
How long from seed to harvest for feminized autos?
Most lines run 10 to 14 weeks from sprout, with quick strains near 9 to 10 weeks and heavy yielders near 15 weeks.
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Do I change the light schedule to force flowering?
No. Autos flower on age. Keep a steady 18 to 20 hours of light for most of the cycle and let the plant set its own pace.
Are feminized auto seeds worth the extra cost?
For most home growers, yes. You skip male plants and you skip a light flip, which simplifies a small tent or a short outdoor season.
How many seeds should I buy?
Start with a 3 or 5 pack of one line so you can read how it grows in your space before you commit to a 10 pack.
Can I grow them outdoors?
Yes, in a legal state and a warm window. Autos let you run a spring round and a summer round without light deprivation. Check your state law before you order anything.