I’ve recently purchased a few new ingredients for soil mixes.
First: Clay Pebbles. Lightweight, porous for water retention. Big bags are easily available from hydroponic shops. And you don’t have to grow weed in them.
Next: Pumice, 7 to 20 mm grade. This is actually annoying… the only place I can find this size is Enfield Produce in Sydney, and this is heavy-ish, so this means I pay as much again in shipping. 🙁
Here’s what the size actually means:
And finally, some bark for bacteria, which also turned out to be nicely sized to match the others. This is a potential replacement for the charcoal I’ve been using. I assume I can find something like this locally.
This lot are all of a similar size (and match my scoria). I plan to mix it together, in maybe 1 part Orchiata, 4 parts everything else. Now I just need to grow something in it.