again i should have more specific i'm using an oganic soil i home made its 20% peat 20% sand 50% compost and 10% pine mulch thats been in my land lords garden for 3 years so far ive only used 20 20 20 npk fert one time 3 weeks ago and my plants doing great i'm considering not using any thing and letting them grow but i do want the biggest and best yeild i can get my ph is at 6.5 and no pesky critters wellany way any advice would be great this is my first indoor grow