annual asters wilting and dying

Question

Why do my annual asters wilt and die just before getting ready to blossom, after being healthy for over a month?

Answer 1

Are they yellowing too? If so, your plants may be infected with fusarium wilt disease, which is common in asters and many other plants. Here is more information: https://www.gardeningknowhow.com/plant-problems/disease/controlling-fusarium-wilt.htm