Thanks guys, Bev no idea, but I can figure it out...4 by 1.5 feet of chicken wire, a semp in each space. Jackie, yes this is the same, I haven't added any semps, they are growing in now so you can see them. Some of the ones I used were small!! Very small (pea sized or smaller) and I wasn't even sure they'd live, a couple haven't and I've replaced them but I haven't added any! I'll take a photo tomorrow of one that I didn't think was going to make it, it had its crown smooshed somehow, or eaten away or something, anyway after a couple of months it has a whole new rosette growing!!