1, pineapple leaves yellow, lack of nitrogen, magnesium, iron, phosphorus, potassium all will appear leaf color is not green. First spray high nitrogen foliage, keep ventilation. Water can not be more watering, the soil should be breathable, supplement the appropriate light. Wooden pineapple is the city's native species, in the urban greening is very widely used. Wooden pineapple, also known as pineapple honey, tree pineapple, trunk straight, crown smaller and neat, smooth bark, smaller leaves, base slightly wedge-shaped, leaf surface is rougher, leaf color green glossy, more oval. Fruit fat and soft, sweet and delicious, rich flavor, and very large after maturity, so it is known as the "Queen of Tropical Fruits". Pineapple honey is a treasure of the whole body, in addition to the fruit can be eaten, its sap and leaves can be used as medicine. And because of the pineapple on the temperature, soil requirements are not high, so it is widely used as shade trees and street trees. At the same time, pineapple honey is also the city's Yangdong District's famous specialty fruits, there is a wide range of planting, Yangdong District has also been named "China's pineapple honey township".