Posted: 21/01/2014 at 12:09
There are now some good peat free composts around, I've been peat free for several years now - a shaky start but now it seems to be OK. I use old compost in the bottom of pots, as a mulch anywhere, and in the bottom of baskets, with new good stuff on top - works for me.
Personally I don't like grow bags, the root space is too shallow, since I started using deep pots for tomatoes etc. in the greenhouse, it goes better.
The green algae on the compost is harmless, but does indicate wetness.
Feeding daily is too much, better to use a good quality feed weekly, or a pelleted one now and again. Over fed plants just get long, pale and weak, as it is said 'treat 'em mean and grow 'em hard' for good results. Let the plants do the work, you are just the carer!