Posted: 07/01/2015 at 18:22
I have used Provado ( mainly for containerised Heucheras ) but the maximum usage for this chemical is given as 3 times per year.
I'm not fond of chemicals but I do use when nothing else works. Keeping to the manufacturer's recommendations seems to be the sensible way to use these products.
Using something 2 or 3 times a week when 2 or 3 times a year is recommended sounds like overkill to me........if nothing else, a waste of money.