Outdoor Autoflower Seeds Yield: How Much Per Plant

Outdoor Autoflower Yield: Quick Answer

A healthy autoflower grown outdoors in full sun yields 28 to 112 grams (1 to 4 ounces) of dry flower per plant. Growers who use 7 to 15 gallon pots, proven genetics, and a steady feed schedule push 112 to 225 grams (4 to 8 ounces). Numbers above 225 grams per plant happen outdoors, but they are uncommon. Autoflowers flip to flower on their own at roughly 3 to 5 weeks from sprout, so you cannot extend the vegetative stage to build a bigger frame the way you can with photoperiod plants.

Genetics: Two autoflowers in identical pots can finish 60 grams apart. Yield potential is set by the breeder.
Container size: Root volume caps plant size. A 3 gallon pot tops out near 30 grams. A 10 gallon pot can triple that.
Direct sun hours: Six hours is the floor. Eight to twelve hours of unshaded light is where big outdoor harvests come from.
Total days: Most autoflowers finish in 70 to 100 days outdoors. Cold nights slow growth and cut final weight.
Plant count: Four small plants usually out-yield one large plant in the same footprint.

Prerequisites

Autoflower seeds from a breeder that publishes outdoor yield ranges
A spot with at least 6 hours of direct sun, ideally 8 or more
Containers of 5 gallons or larger, or a prepared garden bed
Light, airy potting mix with perlite or rice hulls for drainage
Balanced cannabis nutrients plus plain water
Outdoor temperatures that stay above 15°C (60°F) at night

How to Maximize Outdoor Autoflower Yield

Pick a cultivar bred for outdoor weight. Check the breeder's stated outdoor yield per plant before you buy.
Wait until two weeks after the last frost date and soil temps hold above 15°C (60°F) before starting seeds.
Germinate seeds in a damp paper towel, then move the sprout into its final container within 5 days. Autoflowers do not like transplant shock.
Fill a 7 to 15 gallon pot with light potting mix and set it in your sunniest spot.
Water until runoff when the top 3 cm (1 inch) of soil feels dry to the touch.
Feed at half strength starting in week 3 and move to full strength by week 5.
Tie down side branches with soft plant ties in weeks 2 through 4 to open the canopy to light.
Remove only the leaves that sit directly on top of a bud site, and stop trimming once flowering starts.
Inspect the underside of leaves and the base of stems every 2 to 3 days for mites, caterpillars, and bud rot.
Harvest when most trichomes read cloudy under a loupe, usually 70 to 100 days from sprout.

Common Yield Killers

Starting seeds too early in cold soil, which stalls root growth for weeks
Small pots that stop the plant before stretch finishes
Heavy feeding in week 2, which burns tips and slows the plant
Shade from walls, fences, or neighboring plants during midday
Bud rot after rain, which can erase a top cola in 48 hours

Realistic Harvest Timeline

Expect a dry-weight range of 28 to 56 grams per plant with a 5 gallon pot and 6 hours of direct sun. Move to a 10 gallon pot and 8 or more sun hours, and 84 to 168 grams per plant is a fair target. Weigh your dry flower after a 10 to 14 day slow dry at 18 to 21°C (65 to 70°F) and 55 to 60 percent humidity for a true number.

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