My Grape Hyacinths Re-emerge In The Summer After Dying Back In Spring. Why?

Question

The bulbs bloom in spring, but not in the summer. The leaves are very healthy.

Answer 1

They should, naturally, start to leaf out at the end of Summer or beginning of Autumn. They are cold weather flowers, and will usually go through a period of semi dormancy during the hotter months.

Here is an article that will give you more information on the plant and its care:

https://www.gardeningknowhow.com/ornamental/bulbs/grape-hyacinth/planting-and-care-of-grape-hyacinths.htm