I use jacks classic fertilizer. It has everything that every other company has, micro nutes, the whole nine yards. Cheap as hell, great professional ratios as well. I supplement with molasses to keep microbes afloat, and I use humic acid in with that. If needed I throw in some epsom salt (like a teaspoon per gallon). I mix dolomitic limestone in the soil which provides the Mg and Ca. All in all its a full range of nutrients for less than the cost of one of the gallons of "professional" stuff. I bought some botanicare grow stuff in the beginning and found no difference what so ever b/t that and the jacks classic. Jacks classic regular and flower can be found in a lot of garden centers, or amazon.com (where I got mine). An 8 oz tub of both the regular fert (for veg) and the bloom booster (for flower) will set you back a whopping 15 bucks for both combined. Molasses costs maybe 6 bucks (use only blackstrap molasses) I add that with every feeding, epsom salt costs 2 bucks at your local drug store or super market. Humic acid I found on ebay for 12 bucks (thats with tax and shippping), right here:
http://cgi.ebay.com/Humic-Acid-Organic-Fertilizer-1-pound-soluble-powder-170349629944?pt=Fertilizer_Soil_Amendments&hash=item27a9a111f8.
That makes 2 gallon of concentrate, which is a whole shit load of feedings. You add two ounces of the concentrate liquid that you make from the powder into each feeding, so 12 bucks gives you 128 feedings if you feed a full gallon to each plant. A bag of pulverized dolomitic limestone goes for 2.98 (50 pound bag) at your local big box hardware store. A 50 pound bag is a whole shit load, like more than enough for 100 plants in 5 gallon pots. Maybe even more. I tossed a small handful in with my soil when I am mixing it for use in the pots. You can also sprinkle it on top of your soil and let the water draw it in your soil. With that being said. You can get a full array of high quality nutrients, to provide your plants/soil/microbes with N,P,K,Mg,Ca,S, Humic/Fulvic acid, Micronutes and pH control for less than 40 bucks, including all shipping and taxes. I haven't seen anyone be able to prove that fancy, multicolored, expensive ferts do any better. A nitrogen atom is a nitrogen atom, there are no bad atoms.
If you want to go this way, here how I mix it, Feed about every other watering, I usually go two waterings in between feeds, unless my plants say so. For each gallon of water (ro (which a lot of spring water is if you call the source info phone number provided on the bottle), distilled, or tested tap) I add 1/2 teaspoon jacks classic (either veg or flower mix), 1 tablespoon of molasses, one time in veg and one time in flower I add a pinch of epsom salt, and 2 oz (or a healthy splash) or humic acid. Hope that helps.
