Short answer. Grow many small plants close together and flower them after 0–14 days of veg, so each plant makes one dominant cola and the canopy fills with tops quickly. Higher density raises yield per m² but reduces cannabinoid uniformity between plants and positions, in controlled work on drug-type cannabis [1]; density is among the strongest yield drivers in the cannabis literature [2]. Typical SOG density is 9–25 plants/m² (about 1–2.3 per ft²); Belgian yield trials used 12–20 plants/m² [3][4]. Plant-count limits in many jurisdictions make SOG illegal for home growers; check your local rules.
How to do it
- Use uniform, rooted clones of one cultivar (seed plants vary too much in height and timing).
- Small containers: 1–4 L (0.25–1 US gal), rockwool blocks, or an ebb & flow table (ebb and flow).
- Veg 0–14 days under 18/6, then 12/12.
- Strip the lower third (lollipop) at or soon after the flip; these buds would be larf (lollipopping).
- No topping; maybe light supercropping to level outliers.
Numbers that matter
| Item | Typical |
|---|---|
| Density | 9–25 plants/m² |
| Veg | 0–14 days |
| Container | 1–4 L |
| Cycle time | Shorter by the veg weeks saved; more harvests per year |
| PPFD | Full flowering intensity from day one (PPFD) |
Trade-offs
- Pros: fast cycles, even canopy, less training labour, simple irrigation.
- Cons: many plants (legal and clone-supply issues), uniformity drops with density [1], one sick plant spreads disease to its neighbours, airflow at the base is harder.
Common mistakes
- Mixed cultivars or seed plants (uneven stretch).
- Too long a veg, recreating a crowded SCROG.
- No airflow under the canopy.
Evidence
Density effects on yield per area and on uniformity are Supported [1][2][3]. SOG-specific densities and veg times are Grower practice.
A dominant allele is one whose effect shows in the phenotype even when only one copy is present, masking the other (recessive) allele at that locus.The dense, elongated cluster of flowers that forms at the end of a stem or branch; the main cola tops the leader.Top shelf is the highest price tier of flower in a shop, used as slang for any premium-looking cannabis; it reflects pricing and appearance, not verified quality.A cannabinoid is any compound that binds the body's cannabinoid receptors or shares the typical cannabis terpenophenolic structure; the plant-made ones are phytocannabinoids such as THCA and CBDA.SOG (sea of green) grows many small plants at high density with little or no veg time, each making one main cola, to shorten the cycle.Rockwool is an inert growing medium spun from melted basalt rock into fibres, sold as plugs, cubes and slabs, that holds water and air in fixed proportions.18/6 is the standard vegetative light schedule: 18 hours of light and 6 hours of darkness each day, keeping photoperiod cannabis from flowering.12/12 is the classic flowering schedule for photoperiod cannabis: 12 hours of light and 12 hours of uninterrupted darkness, which triggers and sustains flowering.Lollipopping removes the lower branches and small shoots on a plant, usually around the flip, so energy goes to the top buds and airflow improves underneath.Supercropping is gently crushing a stem's inner tissue between the fingers and bending it over, so the branch lowers, toughens at a knuckle and stays productive.Photosynthetic photon flux density: the number of PAR photons landing on one square metre each second, in µmol/m²/s; the standard measure of light intensity at the canopy.An even canopy is one where all main tops sit at roughly the same height, so each receives similar light intensity and buds develop more uniformly.The stretch is the rapid increase in height in the first two to three weeks after switching to flower, when many cultivars grow 1.5 to 3 times taller.SCROG (screen of green) trains a few plants under a horizontal net, tucking shoots so the canopy forms a flat, evenly lit layer of many tops.Veg time is how long a photoperiod plant is kept in vegetative growth under long days before being flipped to flower, which largely sets its final size.
