PLONVIT^® PK 28:30 is liquid phosphorus-potassium fertiliser with 280g P2O5 and 302 g K2O in 1L. Due to the proportion of phosphorus to potassium, it is recommended in the initial growth stages (development of the root system, increased winter hardiness of winter varieties), during the period of vegetative growth, as well as during the formation of parts of plants intended for harvest (yield and quality).

Recommended especially in the case of soil conditions limiting phosphorus (low or high pH, low humidity and soil temperature below 12°C, low humus content) and pottasium (low pH, low soil moisture, high calcium and/or magnesium content, medium and heavy soils, high light intensity) availability.