Hi Everyone,
I have five Brunnera (Jack Frost) in a row, and two are doing great. The leaves on three of them, however, are suddenly turning black and shriveling. They all receive about 4 hours of direct sun and then shade. I can’t figure it out, and I saw this discussion and thought you might have a suggestion. Thank you!
Are the ones that are black and shriveling up getting too much water, say, from a downspout positioned there, or run-off from the roof? Are they mulched more heavily than the others and retaining moisture?
It seems counter intuitive, but blackening leaves can be from too much water or ‘wet feet.’ (root system)