Gardenia flowers generally bloom in spring and summer, specifically around May and June.

Generally speaking, gardenias generally bloom in spring and summer. The flowering time will vary depending on the variety and the climate change of the year, but it generally starts blooming around May or June.

If cared for well, it will bloom until August. However, a single flower can only bloom for about four or five days. During flowering, water and fertilizer should be appropriate, light should be sufficient, and temperature should be appropriate. It is best to prune before flowering and also after flowering. With proper maintenance measures, however, the time a flower stays open is relatively short, generally only four to five days at most.

Things to note during the flowering period of gardenias:

1. Water: sufficient, but not excessive, and no stagnant water.

2. Fertilizer: Fertilizer is needed before the flowering period, but the type should be paid attention to. Do not use nitrogen fertilizer, but use appropriate amounts of phosphate and potassium fertilizers.

3. Light: Just place it in a place with appropriate scattered light, not too dark. But it is afraid of strong light, so even in the flowering period, it cannot have too strong light. Generally speaking, a shade level of 50 is most suitable.

4. Temperature: During the flowering period, the temperature is generally more suitable. It should be noted that if the flowering time is early and the temperature is a bit low, the ambient temperature must be adjusted.

5. Pruning: Before flowering, cut off random branches. After flowering, the remaining flowers are mainly cut off.