A healthy cannabis plant yields about 1 to 3 ounces (28 to 85 grams) of dried flower indoors. Outdoor plants with full sun, room to spread, and a long season can produce 10 ounces to 1 pound or more. Those ranges cover most home grows.
Yield per plant is not a fixed trait. It comes from genetics, light, container size, veg time, nutrients, and how you train the branches. Two growers with the same clone can harvest very different weights from the same room.
What Drives Yield Per Plant?
Yield is the biomass you harvest from one plant. It tracks the total light the plant captures during flower and the number of healthy bud sites that get direct light.
- Genetics: some cultivars stack dense colas, others throw airy buds that weigh little.
- Light: indoor plants need strong, even coverage. Outdoor plants need 6 or more hours of direct sun.
- Container size: root volume sets a ceiling on plant size and flower weight.
- Veg time: longer veg builds more nodes, and nodes turn into bud sites.
- Nutrients and water: steady feed keeps flowers stacking instead of stalling.
- Training: topping, low-stress training (LST), and SCROG spread light across more tops.
Indoor Yield Per Plant: Real Ranges
Most indoor growers see 1 to 3 ounces per plant in a 3 to 5 gallon pot under 300 to 600 watts of LED. Skilled growers who run SCROG and long veg can pass 6 ounces per plant in a 4x4 tent. Autoflowers in 2 gallon pots often finish near 1 to 2 ounces.
Where the number comes from
A 4x4 tent holds 4 to 6 plants and yields 8 to 16 ounces total. That works out to 0.5 to 1 gram per watt of light. Growers who track grams per square foot get a better read on efficiency than per-plant counts.
Outdoor Yield Per Plant: Real Ranges
A full-season outdoor plant in the ground can yield 1 pound or more, and large sativas in warm climates reach 2 to 4 pounds. Autoflowers outdoors finish near 2 to 4 ounces per plant. Pot size, sun hours, and harvest date before frost decide most of the outcome.
Why outdoor plants win on per-plant weight
The sun delivers more photons than any home light. A plant with 8 feet of root space and 100+ days of veg builds far more bud sites. Weather, pests, and mold cut that potential, so outdoor numbers swing more than indoor numbers.
How to Increase Yield Per Plant
- Start with a proven cultivar and healthy seed or clone.
- Add light. Indoors, aim for 30 to 40 watts of LED per square foot of canopy.
- Use a bigger pot. A 5 to 7 gallon fabric pot supports more root mass than a 3 gallon.
- Veg longer. Each extra week adds nodes that become colas.
- Train in veg. Top once or twice, then tie branches flat to open the canopy.
- Hold temperature and humidity in range so flowers do not stress.
- Feed through flower, then taper feed in the last 7 to 10 days.
Common Mistakes That Cut Yield
- Letting plants stretch into weak light, which produces popcorn buds.
- Overwatering in late flower, which invites bud rot.
- Skipping pH checks, which locks out nutrients.
- Harvesting early, before buds fill out.
- Crowding plants so lower sites get no light.
Does CBD Hemp Yield Differ From THC Cannabis?
Hemp grown for CBD follows the same rules. Field hemp for biomass can reach 1 to 3 pounds of dry flower per plant, while high-CBD indoor cultivars land near 1 to 3 ounces, close to THC varieties. CBD content is set by genetics and harvest timing, not by plant size.
Which Metric Matters More: Yield Per Plant or Per Square Foot?
Per-plant yield flatters growers with big plants but hides wasted space. Per-square-foot yield shows how well a room converts light into flower, and it holds up when you change plant counts.
Indoor rooms target 30 to 60 grams per square foot per cycle. A tent that hits 60 grams per square foot beats a tent that pulls one giant plant at 40 grams per square foot, even though the single plant looks better on paper.
Outdoor growers should track weight per plant and weight per bed. Sun, water, and soil volume scale with area, so per-plant numbers swing with spacing.
FAQ
How much cannabis does one plant yield in grams?
Indoor plants land near 28 to 85 grams of dried flower. Outdoor plants can pass 280 grams. The exact number depends on light, pot size, veg time, and cultivar.
Does a bigger pot always mean more yield?
No. A bigger pot helps up to the point where light and canopy space limit growth. A 10 gallon pot under weak light yields less than a 3 gallon pot under strong light.
How many plants do I need for one ounce per week?
At 2 ounces per plant and a 4 month cycle, you need about 8 plants per harvest to average 1 ounce per week. Staggered harvests from a veg and flower tent smooth out supply.
Can autoflowers match photoperiod yields?
Rarely. Autoflowers finish fast, which caps veg time and plant size. A well-grown photoperiod plant beats a same-age autoflower in total flower weight.
Key Takeaways
- Indoor: 1 to 3 ounces per plant is normal. Passing 6 ounces takes skill, light, and space.
- Outdoor: 1 pound or more is common for full-season plants in warm climates.
- Light, pot size, veg time, and training move the number more than any additive.
- Track grams per square foot or per watt to compare one grow to the next.