The Swenson Gardens 2016 newly planted peonies are now mulched! Redd was supervising the event and is recommending all peony gardeners in USDA Zones 2-5 to mulch your 2016 newly planted peonies as long as there is 2 to 4 inches of frost in the ground. We use chopped up corn stalks but pine boughs, straw and wood chips will work as well. Mulching is not to protect them from frigid temperatures. Mulching is to prevent heaving of the roots in late winter and early spring from the freeze/thaw events. Sleep well PEONIES and will see you in the spring!