Fertilizer rich in phosphorus, potassium, magnesium, and iron, with slow-release nitrogen. for all green plants in pots or indoor and outdoor plants. over a period of 3 months, the sticks gradually release the fertilizer without the risk of burns. n.p.k. 12-7-7 + 2.5% mg with iron, containing urea and formaldehyde. dosage: 1 unit per 8 cm diameter pot. application period: all year round