Soil for Browningia

[Gypscoprotheres]

At the moment I'm buying the ingredients for the soil that I'll use for my seedlings. I've sown them in April and in more or less the same month next year I'll re-pot them for the first time.

For most of my seedlings I know more or less what type of soil I should use, but there is one specie that leaves me with doubt: Browningia microsperma. I can't find any information on the net about some decent soil.

The ingredients that I'm planning to use are:
-Normal potting soil (without bark or peat)
-Turface
-Coir

I'm trying to follow more or less the article about soil from cactiguide.com: http://www.cactiguide.com/article/?article=article8.php , but I'm not sure about the % of each for this cactus or if maybe I should add something else. (I also have perlite, but I've read that Turface in general is better)

And by the way, this is the cactus I'm talking about
http://www.cactiguide.com/cactus/?genus ... icrosperma

And here are my seedlings :

[iann]

No need for a special soil just for this cactus. Whatever you use for the others will be good.

Where did you find "normal potting soil" with no bark or peat? And having found it, why are you keen to add coir

[Gypscoprotheres]

The "normal" potting soil without bark or peat I hope to find at one of the garden-centres around. I thought they would had it, but reading your answer tells me that will be a hard task.

Adding coir I've read in the following article: http://www.cactiguide.com/article/?article=article8.php

It's easy to buy on-line here.

[iann]

The "normal" potting soil without bark or peat I hope to find at one of the garden-centres around. I thought they would had it, but reading your answer tells me that will be a hard task.

Adding coir I've read in the following article: http://www.cactiguide.com/article/?article=article8.php

It's easy to buy on-line here.

Almost all "normal" potting soils are almost entirely peat and wood products, with some new "eco-" versions actually being made from composted plant material. Hence my scepticism that you had found one that was actually made from "soil".

If you have an actual loam then I would suggest not adding coir to it, at least not for the really xeric cacti and succulents. You know the ones, that everyone calls "rot-prone" Why spoil a good thing?

If you have a mixture of peat and slightly composted wood, then I would suggest not adding it to your coir