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drich30099

Spiderwort turning black!

drich30099
9 years ago

Hi, my spiderwort, the purple and my blueberry one, are developing spots, also black edges on the leaves. Is this a fungus, my peonies have a fungus so I wonder if it spreads? dO i cut it back to the ground, I may get away with just 1/2 way and it still may look ok, would that be better? I'll wait til they're done blooming.
thanks!