I have read a lot of things about the best mix for a raised bed.
Some people believe even in pots there should always be some soil in it.
Everything from 100% compost to varying combinations of peat/sand or perlite/compost have been recommended. What is your optimum mix?
I've planted in mostly compost from derived from city greenwaste
It did fine for cabbages and root crops but not so much for acid loving plants.
Tested compost pH 7.8 high Phos, high K. Needed supplemental N. Plants were short but healthy
Peatlite (50% peat,50% perlite- my basic mix for all pots works for most things. Needs supplemental fertilizer.
60% native soil (mostly red clay) 15% cinder and perlite for drainage and the rest redwood compost, organic compost, and peat moss. Slow release, granular and water soluble fertilizers ( I use citrus fertilizer the most).
Tomatoes, cabbage and greens are big and productive. Root crops taro, beets, daikon produce mostly tops. I have been told I have too much nitrogen and it is probably true. I need to find a mix of amendments and fertilizer that works for both my greens and my roots. My philosophy is to be as organic as is practical, but I don't have any issues with using commercial fertilizer. I use vermicast when it is available, but I do not use manures anymore. I would have to forgo planting for 120 days or plant a green manure instead of vegetables if I used manure.