Fertilizer used in whole growth period of jackfruit and fertilizing method

The invention provides a fertilizer adopted in the whole growth period of jackfruits and a fertilization method. The fertilizer comprises a tree raising period fertilizer, a flower bud differentiation period fertilizer and a fruiting period fertilizer which are five years after planting; the fertilizer in the tree raising period comprises an organic fertilizer, a 15 (N)-15 (P2O5)-15 (K2O) compound fertilizer and a calcium magnesium phosphate fertilizer in a mass ratio of (20-40): (0.8-1.7): (0.8-1.2); in a flower bud differentiation stage, fertilizers comprise borax, magnesium sulfate and a 10 (N)-20 (P2O5)-20 (K2O) high-phosphorus potassium compound fertilizer; the fertilizer in the fruiting period comprises a 12 (N)-11 (P2O5)-18 (K2O) high-potassium compound fertilizer. According to the special fertilizer, the nutrient demand rule of the jackfruit in the whole growth period and the difference of nutrient demands of different tree ages are fully considered, different fertilization schemes are adopted in diff