Short answer, in plain words. Most growers spend weeks growing big plants before they flip to flower. 12/12 from clone skips most of that: rooted clones go straight into the flower room. Each plant is smaller, so you plant more of them, and the room finishes a crop and starts the next one sooner. Over a year that's about 4.5 harvests from one room instead of about 3 (arithmetic below). The founder is a huge fan: with good clones, dialled in, 4+ oz per square foot is "not unheard of" (founder's field experience) [5]. That's well above published research yields, so read it as a top-end result, not a promise.
How many harvests a year?
Count from the flower room's point of view. With about 10–11 weeks from flip to harvest (a typical 8–9 week flowering time plus the 10–14 day transition after the flip; see flip-to-flower transition) and a week to clean and replant:
| Approach (one space does everything) | Weeks per cycle | Harvests per year |
|---|---|---|
| 12/12 from rooted clone | 10.5 + 1 = 11.5 | ~4.5 |
| 4 weeks of veg, then flower | 4 + 10.5 + 1 = 15.5 | ~3.4 |
| 8 weeks of veg, then flower | 8 + 10.5 + 1 = 19.5 | ~2.7 |
| 12/12 from seed (seedling must mature first) | ~13 + 1 = 14 | ~3.7 |
Harvests per year = 52 ÷ weeks per cycle. A separate veg or nursery space lets any approach keep the flower room flowering non-stop; 12/12 from clone simply needs the least veg space to do it.
Yield per year, not per harvest
Each 12/12 plant yields less, so the trick is density: in a controlled study, higher planting density increased yield per area, at some cost to cannabinoid uniformity between plants [2]. Across many studies, yield per area is driven mostly by light and plant density [3][4].
Illustrative yield per square foot per year (multiply per-harvest yield by harvests):
| Per harvest | × harvests | Per year |
|---|---|---|
| 2 oz/ft² after 8 weeks of veg | × 2.7 | ~5.4 oz/ft² |
| 1.5 oz/ft² from 12/12 clones | × 4.5 | ~6.8 oz/ft² |
| 4 oz/ft² from good clones, dialled in (founder's field experience) [5] | × 4.5 | ~18 oz/ft² |
Honest note on the 4 oz/ft² figure. 4 oz/ft² is about 1,220 g/m². In the best published light trial, yield topped out at 519 g/m² at 1,800 µmol/m²/s [4], and our grams per watt answer puts well-run research rooms at about 500–750 g/m². The founder's figure is well above that range; it's a field result from elite clones in a dialled-in room, and a great candidate for documented GenetixBay grow journals.
- ~4.5Harvests a year from one space
- ~2.7With 8 weeks of veg in the same space
- 4+ oz/ft²Dialled-in clone runs, founder's field experience≈ 1,220 g/m², above published yields
Clone or seed?
From clone
Cut from a mature mother
- +Can start flowering soon after rooting
- +Every plant the same: even canopy
- +Known sex and known cultivar
- −Needs a mother or nursery space
- −Pests and diseases travel with clones
From seed
Photoperiod seedling
- +No mother needed
- +Clean start
- −Must mature first: first flowers around the 7th node, after 3–5 weeks
- −Regular seed brings males to remove
- −Uneven heights between phenotypes
Seedlings go through a juvenile phase before they can flower, forming their first flowers at around the 7th node [1] (see can I flower 12/12 from seed?).
What "dialled in" means
- Good clones: healthy, vigorous, rooted, pest-free, from a proven cut.
- Density: a sea of green, many small plants (see sea of green).
- Strong, even light: see more light, more yield.
- A nursery rhythm: the next batch rooting while this one flowers, so the room is never empty.
- Climate and feeding that keep up with fast-flowering plants.
Common mistakes
- Comparing grams per plant instead of grams per square foot per year.
- Flipping seedlings 12/12 and expecting flowers in week one.
- Running 12/12 from clone without a clone supply, so the room sits empty.
- Planting too sparsely for small plants.
