Adding PK13-14 as a feed supplement to the basic feed greatly improves the quality and quantity of the harvest. In the flowering phase, the plant has an increased need for phosphorus and potassium. Potassium ensures that the plant produces enough sugars and thus stimulates flowering readiness. Extra phosphorus ensures better metabolism within the plant. Thanks to the carefully balanced mix of potassium and phosphorus in PK13-14, both are absorbed quickly by the plant. PK13-14 can be used for cultivation on all substrates. PK 13-14 works optimally in combination with the regular basic feed and a flowering stimulator. Active substance PK fertilizer.