Transplanting perennials in zone 4
I have several perennials that I have planted in containers as we live in an apartment. Can I plant them in the ground this fall so they come up again in the spring? If possible, when is the best time as I'm sure they need to "grab" before it gets to cold. Some of the plants that are growing in containers are different types of grasses (New Zealand Hair Sedge, Purple Fountain Grass & Fescue), double headed coneflowers, lupine, columbine, geraniums etc. Any advice will be greatly appreciated.
Submitted by BHGPhotoContest

Transplanting your perennials from containers into the ground for winter is a terrific idea. September through mid-October will be fine for your area. Mulching them will both insulate and protect the crowns and help prevent heaving if the ground freezes and thaws repeatedly. Finally, I'm a little suspicious that your purple fountain grass won't be winter hardy in zone 4. You can sure give it a shot in the ground, but I'm skeptical about its durability.

Answered by BHGgardenEditors