Reading about semps, many websites tout the fact that they will grow anywhere in almost little to no soil, so my question is, is there an ideal soil depth for semps? Does it depend on fully grown rosette size? My first rustic comtainer only has 3.5 inches of soil, is that enough or will semps in it not reach their full potential?
On my overgrown gravel bank, the old variety of tectorums have some rosettes 6 to 7 inches across and have formed dense colonies and they are in a poor gravely clay dirt(albeitwell draining because of the gravel and slope) thats only 4 inches deep until u hit hardpan clay and they seem to be doing just fine considering the neglect and lack of care they had for a few years at least.
