Lilac flowers like sunshine, slightly tolerant to shade, strong cold tolerance, drought tolerance, humidity tolerance and avoid waterlogging. Strong resistance, lax requirements for soil, but suitable for growing in fertile, loose and well-drained soil, not suitable for planting in low-lying and humid places. \ x0d \ x0d \ lilacs should be transplanted before germination in early spring. In the transplanting hole, first apply enough base fertilizer, cover a layer of soil on the base fertilizer, and then fill the seedlings with soil. After planting, water it once, and then water it 2-3 times to survive. Clove has strong adaptability and extensive management. As long as we pay attention to weeding, flood prevention in rainy season and watering in drought, we can grow smoothly. Lilacs don't like big fat, so don't apply too much fertilizer, lest the branches grow white and affect flowering. Generally, before winter, decomposed compost can be applied once a year or once every other year. Before germination in the middle of \ x0d \ \ x0d \ month, prune clove, and desulfurize dense branches, weak branches, pest branches and intermediate branches to make the crown ventilated and light-permeable. If there is no seed left after the flower withers, the residual flower and two buds at the lower part of the ear can be cut off to reduce nutrient consumption and promote the germination of new branches and the formation of flower buds. After defoliation, it can also be pruned once to ensure that the crown is round and beautiful, which is conducive to growth and flowering in the coming year. \ x0d \ x0d \ lilacs have fewer pests and diseases. The main pests are aphids, marsupials and moths. It can be controlled by spraying 800- 1000 times of 40% dimethoate emulsion or 1000 times of 25% thiophosphate emulsion.