There are many varieties of lilac, and their flowering time is different. White lilacs usually bloom from April to may, while blue lilacs bloom twice a year, once from April to June and once from August to September. Lilac is very common and famous. It will bloom from May to June, while lilac will bloom from June to August.
1. Sunshine: Lilac likes warm growing environment. If you want to make it bloom better, you should make sure that there is enough sunshine, so that it can blossom earlier. Note that if you put it in the dark for a long time, it will blossom less.
2. Water: it has a certain drought resistance, but it can't be too short of water. Just water it once a month. Besides, it is also very afraid of water logging, so don't give too much water
3. Change basin: provide enough space for it during its growth, which is also conducive to its flowering. Usually, when breed 3 years or so, should change basin, still want to cut old root when changing basin..