The GreenPlanet HORTI RawK is a straight potassium flowering additive at 0-0-62. It's used separately from your regular feed during the last three weeks of flower, giving plants a large dose of potassium when they're bulking hardest.
Why potassium late in flower
Potassium drives sugar production and the storage of energy for flower development, and it strengthens stems to carry heavier flower sites. Plants short of potassium late in bloom tend to finish with looser flowers.
How to use it
RawK is applied separately from your normal feed. In soil, use 1–2 g per litre of plain water once a week through the last three weeks of flower, allowing at least one week of flush. In hydro, empty the reservoir, add 1–2 g per litre of fresh water, circulate for 48 hours, then flush and replace with fresh nutrient solution; repeat the following week, again allowing at least one week of flush.
Full specifications
| Manufacturer | GreenPlanet Nutrients (British Columbia, Canada) |
| Line | HORTI |
| Type | Straight potassium flowering additive |
| Analysis | 0-0-62 |
| Dose rate | 1–2 g per litre (4–8 g per US gal), in plain water |
| Stage | Last 3 weeks of flower, leaving at least 1 week of flush |
| Sizes | 100 g · 500 g · 1 kg · 5 kg |
FAQ
Can I mix it into my normal feed?
No. RawK is applied in plain water, separate from your nutrients — see the soil and hydro steps above.
Do I need it if I run HORTI Late Bloom?
Horti Late Bloom already carries high potassium for the finish. Use one approach or the other, not both.
How often?
Once a week in the last three weeks of flower, always leaving at least a week of flush before harvest.