I get more air in my home made compost mix than in anything I can buy except bark which is full of fresh wood splinters. I routinely use half rotted leafmould for small pots containing some Fritallaria species, Arums, Biarums, Galanthus, Muscari, and especially Crocus and reticulate Iris which are happy in a high proportion of the leafmould whether under glass, or in open frames with rainfall at random throughout the year. Corms drying out before they have built new ones go dormant very quickly and die, this compost prevents that problem. However, It would kill many other bulbs. Most Crocus get at least 50% leafmould when I pot them. The leaf mould is NOT fully rotted. It works in my cool semi maritime climate Peter (UK) On 19 January 2015 at 19:05, Alberto <ezeizabotgard@hotmail.com> wrote: > A more moisture retentive mix and home made compost are two very diferent > things > >