University of GeorgiaOn the April 23 “Gardening in Georgia,” host Walter Reevespresents two important lessons for gardening: pruning thosestubborn nandinas and building cold frames.”Gardening in Georgia” airs on Saturdays at 12:30 and 7 p.m. onGeorgia Public Television. It’s produced by the University ofGeorgia College of Agriculture and Environmental Sciences andGPTV.This week, Reeves gives special guest Jim Midcap, a UGAhorticulturist, a challenge: a thick bed of nandinas at Reeves’home. And Midcap shows how to trim even the toughest nandinas.The key, he says, is to use a stair-step process. The resultshould be nandinas that have foliage from top to bottom.Reeves will cover preserving plants for next spring, too, bybuilding cold frames. He shows how to build three types of coldframes to protect plants as you bring them outside in the spring.The cold frames are easy to make. Reeves makes one out of balesof hay and an old window sash. For another, he uses a stormwindow and a box of 1-by-6 boards. He makes the third from PVCpipe and 4-mil plastic sheeting.