I Agree epsoma is cheap,but high quality.I use their BIO-TONE,STARTER PLUS for TEA'S to inocculate my soil, its 4-3-3 & HAS 7-bennie bac species,& 10 fungus species,LOWES dont carry the epsoma bulb fert in my area,but that is a good choice for flowering,I Also use JOBES products,even cheaper than Epsoma but better in my opinion,a 4lb bag of 4-4-4 all-purpose fert is only $7! AND it only has 4 simple ingriedients FEATHER MEAL,BONE MEAL,COMPOSTED POULTRY MANURE,& SULFATE OF POTASH...IT ALSO HAS 7-bennie bac,& 10 fungus,some of them different f/epsomas,so I end up with like 10 diff bacteria & 15 diff fungus species in my soil f/ combining those 2 products in my tea,plus all the bennies I get outta my compost bin,I add a couple handfulls of compost into the panyhose with the other 2 products. Then throw sum sugar,mollasses,& whole oats into a 5 gal bucket of very warm h2o,put a $5 air pump f/petco,& let it bubble away 4 a day,then pour it liberally onto my soil,& shabam u got soil TEAMING with good life 2 feed ur plants.I JUST PICKED UP F/ LOWES An 8.81oz bag of JOBES FERTILIZER SPIKES for only $5.50,3 INGRIDIENTS are feather meal,bone meal,& sulfate of potash- u get 50 fast breaking down all organic spikes,and its an absolutely PERFECT FLOWERING NUTE w/ a 2-7-4 RATIO!!! Its been a wk and my plants r luving it,I HIGHLY RECOMMEND THEM TO ANY BODY FLOWERING PLANTS,THEY MAY LAST ME ALL THE WAY through flowering for under 6 bucks w/tax.KANT BEAT THAT NE where.I also am feeding compost tea & mollasses once a wk each alternating,whitch costs me $4 for grammas mollasses,& the compost is free.My plants are so much happier organic,rather than chemical fed.And I hardly ever gotta check PH,which was a constant pain in the ass,and NEVER rite when chemical fed.BUT its gotta b 1 way or the other,combining chem & organic like I was, dosent work 2 well,cuz the chems kill of ur bennies in the soil. HAPPY GROWING MY FRIENDS.