1. Cut the pedicel first. The purpose of this step is to prevent pedicels from consuming nutrients.

2. Trim the side branches, trim the side branches to make the main pole grow stronger.

3. Cut off the top of the largest side branch next to the main pole, which is beautiful in appearance.

4. This is the end of pruning. Fertilize the pruned bougainvillea with a spoonful of potassium dihydrogen phosphate and a glass of water.

5. Pour the solution into the basin, and after fertilization, the whole pruning is completed.

Note: Potassium dihydrogen phosphate can provide enough nutrients for plants without too much.