I've made everything from compost(CPR) too topsoil. The complete soil mix (mineral plant mix) I can water every day with zero problems ( silica sand)
But you go scientist
Here's what I know about organic grows ( organics period). There's no topsoil worth the name on the market(s). Loam is the ultimate for what we do.
Clay ( calcium bentonite) 1/3
Sand (silica, the only sand that doesn't hold moisture)1/3
Silt ( contains around 1% nitrogen) use EWC 1/3
You can...
If the grow is 100% QUALITY Organic ( 80% plant matter/ composting ; 180-200° F heat up in 3 days✔️,raw humus in
14 days✔️ That's what I mean when I state QUALITY ✌️
When you have quality grows for one THERE ARE NO F. BUGS, MOLDS OR MILDEW✔️ AND BENEFICIAL INSECTS WILL APPEAR FOR A VISIT...
All we can do is too emulate nature. I've done it pretty good. I've been using earthworm castings replacing the Silt, Also Bentonite Clay, and silica sand. Equal parts of each. My Topsoil. Still wish I could have y'all's Topsoil