Short answer
A healthy indoor cannabis plant usually finishes at 1 to 2 oz of dried flower for a first grow, 3 to 5 oz with tuned lighting and training, and 6 to 8 oz or more in a dialed room. Outdoor plants in good soil and full sun commonly reach 1 to 3 lb each. Autoflowers run smaller, often 1 to 4 oz. Dry weight is measured after a 10 to 14 day slow dry and a cure, not at harvest day.
Typical yield ranges by setup
- Beginner indoor, 2 by 2 ft tent, 100 W LED: 1 to 2 oz per plant.
- Tuned indoor, 4 by 4 ft tent, 400 to 480 W LED: 4 to 8 oz per plant.
- Autoflower indoor: 1 to 4 oz per plant, limited by a fixed short life cycle.
- Outdoor in a 20 to 30 gal pot, full sun: 8 to 16 oz per plant.
- Outdoor in native soil, long season, large plant: 1 to 3 lb per plant.
- Efficiency benchmark: 0.5 to 1.0 g of dried flower per watt of light. Skilled growers push past 1.0 g/W.
What actually moves yield
- Light delivered to the canopy, measured as PPFD at the top of the plant, not the wattage on the box.
- Vegetative time. A 4 week veg plant cannot match a 8 week veg plant in final weight.
- Root volume. Pot size caps plant size more often than nutrients do.
- Genetics. Cultivar and phenotype set the ceiling before you touch a dial.
- Environment stability: 75 to 82 F in veg and flower, 40 to 60 percent RH, steady VPD.
- Canopy management. Topping, low stress training and SCROG turn vertical height into horizontal tops.
Prerequisites
- Legal check: confirm state and local rules for home cultivation, plant counts and hemp versus high THC cannabis.
- Feminized photoperiod seed or a rooted clone from a known cultivar.
- Grow light with a dimmable driver and a PAR meter or phone app for PPFD checks.
- Pot sized to the plan: 3 to 5 gal indoor, 15 to 30 gal outdoor.
- pH and EC meters, plus a complete base nutrient line.
- Exhaust fan, carbon filter and an oscillating fan for air movement.
- Hygrometer, timer and a drying space at 60 to 65 F and 55 to 60 percent RH.
How to raise yield per plant, step by step
- Pick one cultivar suited to your space and light cycle, then grow it twice before judging results.
- Set light intensity to 400 to 600 PPFD for seedlings and clones, and raise it as the plant builds leaves.
- Transplant into the final pot by week 2 to 3 so roots never stall.
- Run 18/6 light in veg for 4 to 8 weeks, depending on the space you can fill.
- Top the plant above node 4 once, then spread the new tops outward with soft ties every few days.
- Defoliate lightly at day 21 and day 42 of flower, removing leaves that block bud sites.
- Hold canopy PPFD at 700 to 1000 in flower, keeping leaf surface temperature near 78 F.
- Keep nutrient EC steady through stretch, then taper nitrogen after week 4 of flower.
- Flush for the final 7 to 10 days and harvest when trichomes are milky with a few amber.
- Dry whole branches at 60 to 65 F and 55 to 60 percent RH for 10 to 14 days, then weigh.
- Cure in sealed jars at 58 to 62 percent RH for 2 to 4 weeks before the final measurement.
Measure yield the same way every run
Record dry trimmed flower weight, watts used, days in veg and days in flower. Divide grams by watts to get g/W, and grams by days to get grams per day. Two numbers make grows comparable, and they stop inflated harvest-day weights from hiding real progress.
Cannabis Yield Per Plant Guide: Realistic Ranges
Common mistakes that cut weight
- Counting wet weight and treating it as yield. Expect about 75 to 80 percent water loss.
- Flipping to flower before the canopy fills the footprint.
- Running high EC to chase size, which locks out nutrients and stalls bud development.
- Letting night temperatures swing more than 10 F, which stretches stems and thins buds.
- Skipping the dry and cure, which leaves harsh flower that weighs and smokes poorly.