Terry Hatch (Joy Plants) is planning a crevice bed, and was moaning about the lack of slate, or any other suitable flat stone, here in New Zealand, when I visited him on Friday. I recommended a look at the SRGC Forum. I was absolutely delighted to see the extent of the nursery. Beds of huge clivias, separated into orange or yellow, under the totara and other trees in a lovely section of ancient 'bush' saved from the developers. I bought just two plants: Haemanthus coccineus and Crinum asiaticum. He says he grows Cypripedium reginae, but I'll save that for another day.