my blueberries are growing well. i'm not sure if the leaves need to be little greener or not, but it's not dark green. so been thinking about fertilizer.
i have read ammonium sulfate is he best fertilizer, something like 21-0-0. potash is not good for bb.
but i'm not finding ammounium sulfate anywhere around here. i called all the "feed" store and found one what had it, but it's not 21-0-0. they are all like 31-10-10 or 29-8-8 or something.
i would like to use 21-0-0 since that is what semes to work, but since i can't find it, would 31-10-10 or 29-8-8 work? both MG and other brands have acid loving plant fertilizer. will they do the job? will the potash in them cause any problem?