woody333333
Well-Known Member
I think all soil has gnats in it..... If not it will as soon as you keep it too wet for a day or so....... Dry it out the gnats go awayEpsom supplies Mg and S.
Dolomite is a liming agent and has plenty of Mg available......If amending FFOF all you need is about a good handful (1/2cup) per bag and mix in well.
FFOF and FFHF always seem light on liming agent and Mg in my book.....pH will slip and Mg def's occur regularly.
FF soils tend to carry soil borne pests like fungus gnats.....