Culvers Root

I have several of these in my garden chosen by a garden planner so hopefully suitabley positioned. However the leaves on a few of them have suddenly gone black but the stems are still green. Any ideas what has happened?

Veronicastrum trouble

Reply from Kathy C

Hi, Lorna,
Veronicastrum like moist, well-drained soil, preferably in full sun. As long as they looked good all summer, I would think they were in the right position. Typically, the old leaves of Veronicastrum turn brown after flowering (which is pretty much this time of year). Turning black could indicate a fungal problem. Regardless, cut the plant down to new basal growth and destroy the dead cuttings. Next year, you can spray the plants with a fungicide if you notice the problem early in the growing season. If it is a fungus, this will prevent its spread.
Kathy C.

Thanks

Reply from Lorna Whittemore

Thank you very much, I will get chopping.