Crevice Trough

Here is the crevice trough made last year and named Ortlerpot because the stones come from the North Italian Ortler mountain. The picture from yesterday:

The flowers of Androsace carnea are already gone and the stems elongating very much. The little Androsace pubescens is still waiting (on the left can be seen the three buds). 

And today the flowers are opening. It has longer pedicels than I expected for:

I have observed for a few years that the crevice gardening is the most sustainable for alpines here in hot Hungarian summers, even for not crevice plants.

But it must be indeed like a crevice: the stones buried in the soil at a distance of max. 2 cm. This way even the Silver Saxifrages can easily survive our desert-like summers.

My compost in these crevice troughs looks like: in the crevices only sharp sand with a very little amount of peat, and underneath about 3 cm potting mix: humus, peat, perlite and sharp sand in equal parts. This seems to work well until now.