Hands-on workshop led by Arboretum horticulture staff and greenhouse volunteers Back by popular demand, the Arboretum’s staff and volunteers are once again offering this workshop to help give new life to some of your neglected old houseplants. We can prune, clean, and repot with fresh soil mix (yes, we can do orchids). We can even give them a shot of fertilizer to get them going. The Arboretum will supply the soil, fertilizer, and expertise, but …