How Do You Prepare Asters for Winter

Water the ground around the asters well before it freezes. Make sure the ground is moist but not soaked. Cut the asters down to the ground after the ground freezes. Cover the asters with 2 to 3 inches of mulch to protect the roots during the winter.

Do you cut down asters in the fall?

Prune By Cutting Back Cut back aster plants in late autumn, after the first hard frost. Snip off the stems 1 to 2 inches above ground level. Rake up and discard the pruned matter into a green waste bin to discourage insect pests from colonizing the soil around the asters.

How do you prune asters for the winter?

The Old Farmer’s Almanac suggests cutting them back after the foliage has died, or leaving the stalks through winter to give your garden some off-season texture. Cut the yellowing foliage back to about 2 inches from the ground for best aster winter care, American Meadows recommends.