A healthy autoflower cannabis plant typically yields 1 to 4 ounces (28 to 113 grams) of dried flower indoors. With strong LED lighting, a 5-gallon pot, and low-stress training (LST), 4 to 8 ounces (113 to 225 grams) per plant is realistic. Outdoor autoflowers in warm, sunny climates commonly produce 2 to 6 ounces (56 to 170 grams) each.
What is the average autoflower yield indoors?
Indoor autoflower yield depends heavily on light intensity, pot size, and grower skill. Here are realistic ranges per plant.
Cannabis Yield Per Watt LED: Realistic Grams per Watt
- Beginner setup (basic light, 3-gallon pot): 0.5 to 1.5 oz (14 to 42 g)
- Intermediate setup (quality LED, nutrients, LST): 2 to 4 oz (56 to 113 g)
- Optimized setup (high PPFD, 5-gallon fabric pot, VPD control): 4 to 8 oz (113 to 225 g)
Yield per plant spread across a tent matters more than the headline number. One 8-oz plant in a 2x2 tent equals 2 oz per square foot, which is above average for home grows.
What is the average autoflower yield outdoors?
Outdoor autoflowers benefit from free sunlight and larger root space. A 2 to 6 oz per plant range is typical in a warm, sunny climate with a 5 to 7-gallon pot. In long-season regions like California or the Mediterranean, 6 to 10 oz (170 to 280 g) per plant is possible with high-yield genetics and rich soil.
Maximizing Good Yield Per Plant for Experienced Growers
Why do autoflowers yield less than photoperiod plants?
Autoflowers carry Cannabis ruderalis genetics that trigger flowering automatically after 3 to 5 weeks of vegetative growth. That short veg window limits total plant size and bud sites. Photoperiod plants can be kept in veg for months, which lets them grow much larger before flower.
How many grams per watt do autoflowers produce?
Most home growers achieve 0.5 to 1 gram per watt of light. A 200W LED yielding 100 to 200 grams (3.5 to 7 oz) across two to four plants is a normal, realistic target. Yields above 1.5 g/W require CO2 enrichment, precise environment control, and high-yield strains.
What factors increase autoflower yield per plant?
- Genetics: modern autoflower strains selected for size and resin yield can produce 20 to 40% more than older dwarf autos.
- Light: target a daily light integral (DLI) of 30 to 45 mol/m²/day and PPFD of 400 to 700 µmol/m²/s during flower.
- Pot size: use at least 3 gallons (11 L); 5 gallons (19 L) is the sweet spot for larger plants.
- Training: LST spreads branches and exposes more bud sites to light. Topping works only on vigorous plants topped by day 21.
- Environment: keep 70 to 85°F, 40 to 60% relative humidity, and VPD between 0.8 and 1.5 kPa.
- Medium: coco coir or hydroponics often outyield soil because of faster growth and better oxygen at the roots.
What pot size gives the biggest autoflower yield?
A 5-gallon (19 L) fabric pot is the best balance for most indoor autoflowers. Roots get enough space without the plant spending weeks filling a huge pot. Outdoors, a 7 to 10-gallon pot lets autoflowers reach their genetic potential in warm, dry climates.
Can you top or train autoflowers for more yield?
Top only healthy, fast-growing autoflowers between day 14 and day 21, before pre-flowers appear. LST is safer and usually adds 10 to 25% more yield by creating an even canopy. Avoid high-stress training after the plant starts flowering because it cannot recover veg time.
How many autoflowers per square foot?
Most growers run 2 to 4 autoflowers per 4 square feet (a 2x2 tent) in 3-gallon pots. That density produces roughly 1 to 2 ounces per square foot with decent lighting. Fewer, larger plants in 5-gallon pots yield similar totals but take longer to fill the space.
How long from seed to harvest for an autoflower?
Most autoflowers finish in 8 to 11 weeks from seed to harvest, with some large strains taking 12 to 13 weeks. Yield per plant is a direct trade-off with that speed: longer-finishing autos generally produce more flower.
Do autoflowers yield more in soil or hydroponics?
Hydroponic and coco-coir autoflowers commonly yield 10 to 30% more than soil-grown plants when nutrients and pH are dialed in. The trade-off is more frequent feeding and monitoring. Soil grows are more forgiving and still hit the 1 to 4 oz per plant range.