As far as cheap fert. Don't even bother with that cheap agricultural stuff.The fert should be a guaranteed analysis and uniform in shape (round) You will want sulfur coated fert for warmer, drier conditions. If you go to Lesco, the price varies by how much you buy. I have a Co. that makes their own fert about 30 min. away. Great stuff. A 50 lb. bag of 35-3-7 40%scu costs me $7.55 a bag. Lesco wanted $13.00 for 32-3-7 25%scu.