The ground planting must be equipped with a support to make it climb on the shelf. Always pay attention to pinching new branches to form short and clustered plants. After changing pots, prune some over-dense branches, over-flourishing branches, dead branches and moth-eaten branches to promote more new branches. Bougainvillea should be picked in July and August to control its growth, promote the formation of flower buds and bloom vigorously. 5 ~ 6-year-old plants need to be cut short or pruned again.