Echeveria nodulosa ‘Painted Echeveria’ is a succulent that can get 20 inches tall and wide. It likes full sun. Photo by Connie Oswald Stofko Our soil is still frozen, so there’s not much to do outside right now. But there’s plenty to do inside during the Spring Preview event at Mischler’s Florist & Greenhouses, 118 South Forest Rd., Williamsville. The event will take place from 8 a.m. to 5 p.m. Friday, March 7 and 9 a.m. to 5 p.m. Saturday,…