Description
A concentrated phosphorus-potassium boost for the flowering stage
PK 13-14 is a high-strength phosphorus and potassium additive dosed during the mid-to-late flowering stage, when a plant's demand for these two elements rises sharply as it builds flower and fruit mass. The 13-14 in the name refers to the ratio of P2O5 to K2O in the formula, giving growers a concentrated top-up of exactly the two nutrients flowering plants pull hardest on, on top of whatever base feed and bloom booster is already running.
It is designed to be introduced partway through flower, typically once flower sites are well established, and run for a defined window rather than for the whole bloom period — overusing a PK booster or running it too early can push EC too high or crowd out other nutrients the plant still needs. Used correctly across the final weeks of flower in soil, coco or hydro, it is aimed at growers looking to build denser, heavier flower sites before the plant moves into its final ripening and flush stage.
- High-strength P-K formula targeted at flowering-stage demand
- Boosts flower and fruit set during the mid-to-late bloom window
- Used alongside a base feed, not as a replacement for it
- Suits soil, coco and hydro systems
- Applied for a defined window rather than continuously through bloom
- Formula: P2O5 13% / K2O 14% (PK 13-14 ratio)
- Use stage: mid-to-late flowering
- Typical dose: 1-2ml per litre, twice weekly for 2-3 weeks (confirm against product label)
- Compatibility: soil, coco, hydro
