mildew on plants, shrubs in wisconsin,,,,HELP!
we have a yard that is predominantly shade that is mulched annually with shredded bark mulch. it is heavily planted with all the traditional shade/semi shade shrubs & plants that are zoned for 4/5.
we have a problem with mildew on the foliage of too many plants! we try not to water overhead too often (but do!)
and only water regularly the new plantings or existing shrubs when they are in need.
any ideas? thank you