Hi Jim i have your same problem with heavy clay soil, after years of amending the clay i now just build up with sand and humus over top of the clay an forget about the clay underneath, if you have lots of worms they will mix the clay into the top sand so you may need to but a landscape barrier cloth between the sand and clay, think raised bed, rock work edges, btw i have Crocus savitus planted in my ordinary clay garden soil in a rain shadow by the house in full sun and they bloomed nicely this past fall planted 2 inches deep in sept 2012. after reading about the need for deep planting i put some more soil on top last summer, but not more that 1 more inch as they are interplanted with dwarf bearded iris. Rimmer On Nov 29, 2013, at 8:24 PM, James Waddick <jwaddick@kc.rr.com> wrote: > Dear Roland and Alberto, > > If I planted Saffron 15 cm deep in my heavy clay I doubt that I’d ever see them again. This or 30 cm (!!) might work in sand, small gravel or loose loam, but not in my heavy clay. Jim W. > > On Nov 29, 2013, at 4:58 PM, Bulborum Botanicum <bulborum@gmail.com> wrote: > >> I plant them 18cm deep > > > James Waddick > 8871 NW Brostrom Rd > Kansas City, MO 64152-2711 > USA > Phone 816-746-1949 > > > > > > _______________________________________________ > pbs mailing list > pbs@lists.ibiblio.org > http://pacificbulbsociety.org/list.php > http://pacificbulbsociety.org/pbswiki/