Fertilizer rich in phosphorus, potassium and magnesium with slow release nitrogen. for all green plants in pots or planters, indoor and outdoor. over 3 months, the sticks progressively release the fertilizer without risk of burning. n.p.k. 12-n.p.k. 6-8-12 + 3% mg with iron containing urea formaldehyde. dosage: 1 unit/8cm ø pot. application period: all year round.