Why do my annual asters wilt and die just before getting ready to blossom, after being healthy for over a month?
Annual Asters Wilting and Dying
Certified GKH Gardening Expert
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