No experience with HF but have read that itís not as hot as FFOF. Either way, go 2:1 or even 1:1 ratio cut with perlite and youíll be fine. I can attest to FFOF being fine for this. And since HF is supposedly not as hot, you should be fine using it too, with either ratio. Just donít cut either with castings. No need. Use perlite. Start in a small container. Years ago laziness led me to germinate seeds directly into a mix of FFOF, FFOPM, FFLW & Perlite, at a 2:1 ratio, without issue. Perlite is the key here, cut appropriately. Best of luck!
ß467. I am sitting with a philosopher in the garden; he says again and again ďI know that thatís a treeĒ, pointing to a tree that is near us. Someone else arrives and hears this, and I tell him: ďThis fellow isnít insane. We are only doing philosophy.Ē
― Ludwig Wittgenstein, On Certainty