GreenPlanet. PK Spike

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PK Spike is formulated to provide a uniform quantity of phosphorus and potassium to your flowering plants. Designed with over 25% more P/K than the next industry leading brand, thi s product can be applied at a maximum rate of 1mL/L to achieve a 250ppm P/K spike to your plants. Use: Begin use in week 2 of flowering cycle. Show more