Cannabis Yield Per Plant: Average Indoor & Outdoor Harvest

How much cannabis does one plant yield?

Most indoor growers harvest 1 to 4 ounces (28 to 113 grams) of dried flower per plant. Experienced growers with strong lights, trained plants, and proven genetics often reach 8 ounces to 1 pound (227 to 454 grams) per plant. Outdoor plants in full sun commonly produce 1 to 2 pounds each, and large plants in a long season can exceed 5 pounds.

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What determines cannabis yield per plant?

Yield comes down to three things: how much light the canopy captures, how well the plant converts that light into flower, and how long flowering runs. Genetics set the ceiling. Environment and technique decide how close you get to it.

cannabis yield per plant photoperiod

• Genetics: high-yielding photoperiod strains and modern autoflowers carry different ceilings.
• Light: a 100 watt LED in a small tent supports far less flower than a 480 watt fixture over the same plant count.
• Space and pot size: root volume caps plant size, and plant size caps flower weight.
• Training: topping, low-stress training, and screen of green spread branches so buds get even light.
• Nutrition and water: steady feeding avoids the stalls that cost weeks of growth.
• Climate: temperature, humidity, and CO2 control how fast the plant grows and how densely buds form.

Indoor vs outdoor cannabis yield

Indoor growing gives you control, so results are consistent and predictable from run to run. Outdoor growing gives you free sunlight, more root space, and bigger plants, but weather, pests, and mold can cut a harvest overnight. A well-managed outdoor plant usually beats an indoor plant in raw weight per plant, while indoor wins on grams per square foot per year.

cannabis yield per plant autoflower

What is a good grams-per-watt for indoor cannabis?

Grams per watt measures dried flower weight divided by light wattage. About 0.5 grams per watt is a normal first harvest, 1 gram per watt is a solid, dialed-in result, and 1.5 to 2 grams per watt is elite and usually requires high-output LEDs, CO2, and strict canopy management.

How do you increase yield per plant?

1. Veg longer, since each extra week of vegetative growth adds bud sites.
2. Top once or twice to create multiple main colas.
3. Train branches flat with low-stress training so light reaches lower nodes.
4. Upgrade lighting and keep the canopy 12 to 24 inches from the fixture.
5. Grow in a larger pot, such as 5 to 7 gallons indoors and 20 gallons or more outdoors.
6. Defoliate lightly at day 21 of flower and again around day 42 to open airflow.
7. Keep temperature, humidity, and pH in range so the plant never stalls.

Does pot size affect cannabis yield?

Yes. A 3-gallon pot supports a modest plant, a 5 to 7-gallon pot supports a full tent canopy, and outdoor plants in 20 gallons or more can grow into pounds. Roots that run out of room stop expanding, and flowering weight follows vegetative size.

Do autoflowers yield less than photoperiod plants?

Autoflowers often finish at 1 to 3 ounces per plant indoors, while photoperiod plants in the same space can hit 3 to 6 ounces. Newer autoflower genetics close much of that gap, and their short cycle means more harvests per year, which raises total yield per square foot over 12 months.

What is a realistic first-grow yield?

Plan for 1 to 2 ounces of dried flower per plant on a first run, even with good equipment. Small mistakes in watering, feeding, and light distance cost weight, and the second and third runs usually climb past 3 to 4 ounces per plant as you learn the strain.