Potting soil for succulents
I know, there is a lot of information on this subject, and believe me I've read it all. But there is a problem, there are some materials that I can't find where I live - perlite, vermiculite, pumice,...
So, I'll tell you what I can find and I'm asking for your help for the mix and the proportions.
I can find cactus and succulents potting soil (made of turf, pumice and quartz sand); houseplants potting soil (very rich in organic matter); builder's sand (doesn't seem to be that coarse!), gravel and products for bonsai (akadama,...)
My plants are almost all in the crassulaceae family, 2 are mesembs, one aloe and one schlumbergera.
I live in South Europe, Portugal, near Lisbon. It's a zone 10. Summers here are hot and dry and winters are mild but humid.
Could you give me some advice, please?
Thank you in advance.