How To Protect Potted Perennials During Winter

Question From: W. Etters - NORTH CAROLINA
Q: I have potted perennials of 1) flowers: black eyed susans, coneflower, salvia, and of 2)plants/grasses: Shenandoah switch grass, sedum, heuchera (corabells.) I have never cared for them in winter. Which do I need to or can I cover and which should I rather house in an outside green house?

A: I would store them in a protected area ( say the north side of the house under an overhang and bury them in mulch and cover them with a tarp. Be sure the soil is moist but not sodden when it begins to freeze. If you put them in a green house they must be covered and the roof covered with shade cloth to keep the area from warming when the sun is out. Best And Happy Yardening, Nancy