Mr. Poulson is right, T. clusiana and cult. are extremely easy and rewarding here in southern California. Clay, loam whatever they do well. The only time they seem to suffer is when I forget where they are and over plant. Terence Hernstrom Director, Gardens & Grounds Kimberly Crest House and Gardens (where spring is in full blown glory! Iris, Watsonia, etc.) Redlands CA 92373