I find that the miracle gro “organic” potting mix works very well. I don’t actually care if it’s organic or not, but it seems to do a better job at keeping the right moisture level.
Yes. Most varieties of capsicum anuum have fruits that start green and mature to some color between red and yellow. some have fruits that start purple and ripen to pale ivorym or some combination of the above, but in gerneral, green capsicums are green because they are not fully ripe.
most green peppers would have ripened to some other colour if left longer on the plant (even if they are a v ariety that has been selected for best green fruits.