Oleander planting and cultivation

1. The planting time is in spring. It is cultivated in the open field in the Yellow River basin and its southern area, potted in the cold area of the north, and overwintered indoors. When transplanting, it must be planted with soil balls. The planting site should be sunny and without stagnant water. Summer can also be transplanted, but need to trim some branches, cut off the right amount of leaves, in order to reduce water swallow hair and promote survival. The pot is printed and changed every 2-3 times, and 6 parts of rotten leaf soil and 4 parts of river sand mixed culture soil are selected on the pot, and the horseshoe piece can also be used as base fertilizer before planting. Truncation should be carried out before planting to promote and maintain the branching pattern of three branches and nine tops.

2.Illumination and temperature of potted bamboo plants should be kept indoors for overwintering, keep at room temperature more than 5 ℃, and put them in the place where the window is fully exposed to sunlight. It generally moves into the greenhouse around October 20 and out of the greenhouse around April 20. After leaving the room, it should be placed in the leeward and sunny place, and gradually placed in the ventilated sunny place.

3. Water thoroughly after watering and fertilizing planting. After planting oleander, the soil can always be kept moist after its life is stable. Potted oleander is watered once in the morning and once in the afternoon in summer; it is generally watered once a day in spring and autumn; the amount of water can be reduced after entering the house in winter. Thin liquid fertilizer is applied 2-3 times a month in the peak growing season. Potted oleander can apply organic fertilizer once a year in spring, such as rotten manure or stable manure. Nitrogen, phosphorus and potassium compound fertilizer was applied once before and after flowering. Stop fertilizing in winter.

4. Shaping and pruning oleander has strong tillering ability, so the tree shape can be controlled by pruning. Generally, the trunk of the seedling is fixed when it grows to 40-50 cm, and three main branches are retained to make it continue to grow. later, when it is pruned in early spring or late autumn, the main side branches and the side branches on them are still pruned with the same method to make the tree "mushroom shape" with "three branches and nine tops", so as to ensure that the crown is plump and the ornamental value is high. In addition, the residual flowers should be removed in time after flowering to reduce nutrient consumption.