I think you are not fully clear on peat moss. Peat has virtually no nutritional value. Your plants will die shortly after the first few weeks with only water and peat, you have to add something. Everyone that grows organic grows in soil, and growing in a medium that has no nutritional value is known as hydroponics, hence my suggestion to use hydroponic nutes. If you want to try and find a dry hydroponic nutritional additive you are a pioneer and need to experiment, please keep us filled in with what you find I would love to follow along and learn. There are dry hydroponic nutes, but generally they are added after mixed with water first and ph balanced.