Compost + peat ph?

I was treating my compost and peat mix as soil for my ph ing but I got to thinking compost isnt really soil and peat is basically soiless so should I be shooting closer to 5.8 rather then 6.3

Depending on the ratios. If it’s more peat, definitely 5.8.

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Why the diffrence in ph does the peat raise it ?

Kk thanks its exactly 1/3 of my mix the other 1/3 being aeration perlite and vermiculite (so soiless) 1/3 compost technically soiless so I suppose the 5.8 would be best

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Soil based mediums require higher ph (I think the composition buffers it somehow) while coco and peat are basically just solid hydroponics in a pot