while it is possible and normal to grow in compost and good top soil it is the norm to use peat moss regardless of what the environmentalists are saying about it as in it isn't right but they keep doing it and its normal to use it as an option for work. I could advise using coco and hydroponic nutrients but if you want to grow organically then it is normal to use peat moss. You can purchase Gaia Green products and amend with those instead of purchasing the dry fertilizers separately. Someone would need to give a recipe or you can look one up or ask for one.