MikeyB420
Naughty Step Holder
Ya might be onto something about the heat.i either dreamt it or saw it somewhere,but are people diy ing pizza ovens and mixing the vermiculite with cement and stuff cause of the heat insulation/fireproof properties of hmm thinking it might be perlite now.
Nah, you were right @archie gemmill vermiculite is a product used/recommended in the construction of wood fired pizza ovens to dissipate the heat! Considering the amount I included (20%) in my soil mix, it now makes sense it was too much with the Telos(')s and fried the seedlings from underneath with reflected heat!
Mikey.