If you bring your mums in for the winter when do you set them back out?
Certified GKH Gardening Expert
Hardy Mums can actually be left outdoors, planted in the ground and winterized with some protection.
If you have a Hardy Mum, you can put it outdoors in the spring after danger of frost has passed for you area.
On average the last frost date in your zone was April 11.
Here are some links with more information.