If you want to go organic a worm farm is a great place to start!
I use my worm castings in water so i pour water in the top and the water flows through the farm to the bottom, flip the spout and out comes black gold.
Talk about sweet tasting buds!!!! I also mix my own soil and ammend it with sheep poo, worm castings, potash seaweed, pearlite and vermiculite and water crystals let it stand 3-5 weeks and plant.
Some plants i use chem based nutes and my private reserve gets worm juice and seaweed and guano, dunno if its psychological but it tastes better to me.