My Stokes asters are wilting from the top down and then melting. This is happening in several areas of the bed. This happened last year but it is worse this year. The area affected last year appears to have come back even after removing the stems of the wilted plants.
Stokes Aster Wilting
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