There was an interesting article in the most recent issue of The Plantsman (8, 3, p. 189-191) reporting great success growing Fritillaria from seed to maturity, without any repotting, in pure Seramis, a proprietary expanded clay product from Germany. The author, Paul Cumbleton, reported that the medium is apparently NOT successful with winter growing South African bulbs perhaps because, he speculated, the feeding regime is hard to get right. I wonder whether anyone else has tried Seramis or another expanded clay material with genera other than Fritillaria and, if so, with what results? On a related point, I wonder if anyone with experience of using it would advise me which grade or particle size of pumice to use for horticultural applications. I've never used it but am keen to experiment with it after reading the recent correspondence on Boophone and other SA Amaryllidaceae. Tom, Zone 8 (Boophone seedlings currently doing well in a coir/ perlite mix)