SOG and SCROG / compare the whole growing system
Sea of green yield per plant has no fixed number. SOG uses closely spaced smaller plants, while SCROG spreads branches across a screen. A smaller harvest from each plant can still accompany a larger harvest per area. Compare dry flower, plant count, growing area and crop time together before deciding which arrangement fits a legal home grow.
The names describe approaches to arranging a canopy. They do not specify the cultivar, light, root environment or time spent growing. Those missing details are why a claimed yield needs more context than the method name.
SOG: sea of green
Uses closely spaced smaller plants to build the crop canopy.
SCROG: screen of green
Uses a screen to guide branches across a canopy.
Last reviewed: November 2026.
Sea of green yield per plant answers only one question
Per-plant yield tells you how much flower the average harvested plant contributed. Per-area yield describes output from the space. If a comparison changes both plant count and growing time, the larger plant is not automatically the more productive system.
What does a yield claim measure?
Choose the denominator and identify the question it answers.
The average contribution
Per plant
Keep plant count and the weighed material basis with the number.
Output from the space
Per area
Use the same cultivation-area definition for both comparisons.
One complete harvest
Per crop
Record the time and resources that produced the harvest.
Output over time
Per period
Include the relevant stages and interruptions rather than comparing flowering days alone.
Use the same material basis too. Wet plant weight, dried untrimmed flower and dried trimmed flower are different quantities. Ask what was weighed and when. A figure without that information cannot support a fair comparison with your own records.
Record plants that failed or were removed as well as the number harvested. Otherwise, a per-plant average can hide part of the effort and resources used to obtain the crop. A useful record describes what happened across the growing space, including interruptions.
What did controlled plant-density research find?
Danziger and Bernstein’s 2022 greenhouse experiment compared one and two plants per square meter across four plant-architecture treatments. Increasing density reduced individual-plant yield, while the per-area outcome depended on the treatment.
For the untreated control, the reported dry inflorescence yield per square meter was 222 plus or minus 14.9 grams at one plant per square meter and 321 plus or minus 19.3 grams at two. The paper reports means and standard errors. This is a measured example of the denominator problem, not a home-yield forecast.
Read the denominator
One plant or two on the same square metre
1 plant per square metre
222 gper square metre
222 gper plant
2 plants per square metre
321 gper square metre
about 160 gper plant
More plants gave more flower per square metre and less per plant. Neither number alone says which setup is more productive.
Write these down with every yield
- What was weighed: wet, dried untrimmed or dried trimmed
- Plants started, failed and harvested
- Area used, and the dates from start to harvest
- Hours the light ran, and your own time spent
Untreated control plants, dry flower, means from Danziger and Bernstein's 2022 greenhouse experiment (plus or minus 14.9 g and 19.3 g). Per-plant figures are our arithmetic from those means. Not a home-yield forecast; a California home is limited to six plants (DCC).
The experiment did not compare a standardized home SOG protocol with a standardized SCROG protocol. Its cultivar, greenhouse and treatments belong with the results. The authors also found effects on cannabinoid uniformity, so a higher area yield cannot be treated as a complete statement about the crop.
How do SOG and SCROG change the work?
SOG emphasizes the number and arrangement of smaller plants. SCROG emphasizes directing branches across a supporting screen. In either case, the grower still needs access to the plants, root containers and equipment. A canopy that looks full from above can be awkward to inspect underneath.
The Journal of Cannabis Research training review discusses canopy-management approaches and the lack of standardized protocols across cannabis types. Read it as a review of practices and mechanisms. It does not supply a single reliable percentage advantage for one home setup.
When planning a screen, check how you will reach the far side, remove a damaged plant and move containers if necessary. For multiple closely spaced plants, check whether you can inspect each one individually. Choose an arrangement you can maintain throughout the crop, rather than only on the installation day.
| Question | SOG planning | SCROG planning |
|---|---|---|
| Canopy approach | Arrangement of multiple smaller plants | Branch distribution across a screen |
| Access | Can each plant be inspected and reached? | Can you reach through and around the screen? |
| Comparison record | Include total plants and crop time | Include training time and occupied area |
Does more training automatically shorten the crop?
The University of Saskatchewan’s vegetative-growth guide describes this stage as the period for building size and shape. Its length varies with the grower’s goals and the plant. A larger trained canopy may involve more time before flowering, which needs to be included in a production comparison.
Explore the sequence
Compare a crop without losing the context
Use your own measured records. No example yield is supplied here.
Define
Choose the material and period
Write down what will be weighed and which start and finish dates count.
Record
Keep the inputs with the crop
Include plant count, occupied area, light conditions, training and interruptions.
Compare
Use matching denominators
Review dry output per plant and per area alongside the time required.
One crop record can inform a decision without proving a universal method ranking.
The university’s flowering guide also describes early-flower stretching and later support needs. A filled screen is therefore a stage in an ongoing process. It does not establish that the canopy has reached its final dimensions or that the rest of the crop will require no adjustment.
Keep separate dates for the start of the plant, entry into the space, flowering transition and harvest. If you compare two systems, say which dates define the period. This makes the result understandable without promising that a technique changes the cultivar’s underlying flowering schedule.
Also record equipment use over that period. A light’s advertised wattage alone does not tell you how long it ran, and a faster flowering comparison can omit time spent establishing the canopy. If efficiency matters to your decision, use actual consumption records and the same time boundary for both systems.
Labor deserves its own note. Record time spent inspecting, watering, guiding branches and cleaning the space. The method that produces more flower in one comparison may still demand more attention than your household can reliably provide. A useful result should fit the way you can maintain the grow.
Start a California home plan with the legal plant count
Los Angeles County’s state-law summary identifies six plants per residence for adult personal cultivation. DCC’s home-growing guidance also directs adults to local requirements. Count existing living plants and check the applicable rules before planning around a high-density example.
This is general information, not legal advice. A commercial experiment does not create permission to reproduce its plant count at home. If you want to ask about current plant options, pick your Vibe store and confirm availability and supplied care information directly.
Frequently asked questions
SCROG directs branches across a screen; SOG builds the canopy from closely spaced smaller plants. Compare the actual plant count, space, crop time and measured dry output rather than assuming either name guarantees a higher yield.
There is no supported universal figure. Per-plant output depends on the plant and conditions, and it can fall while yield per area rises. Use records from a comparable setup and preserve the material and time basis.
A screen changes canopy management. It does not guarantee a harvest. Compare the time and conditions used to produce the canopy as well as the dry output and legal plant count.
Sources
- Danziger and Bernstein: plant-density experiment, 2022
- USask: vegetative growth
- USask: flowering
- Journal of Cannabis Research: training review, published 2025
- Los Angeles County: know the law
- DCC: what is legal
For adults 21 and older. Follow state and local cultivation rules. Keep plants and cannabis away from children and pets.
Ask about current plant options
Pick your Vibe store to check availability and ask about the care information supplied with a plant.