What month is better to start planting flowers? (herb)

In April and May of the solar calendar, after the Grain Rain solar term of the lunar calendar, you can start sowing in the open air. Generally, the average time from sowing to flowering of herbaceous flowers is about 60-80 days. After sowing in April, flowers can bloom in June and July. You can choose to sow earlier or later according to your own needs and the growing period of planting plants.