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black edges on stems

16 years ago

Frequently, after I have deadheaded or cut a flower, the edge of the stem turns black. When that happens, the stem quits growing or producing leaves and flowers. When I notice this, I prune it out and disinfect my pruners with anticeptic wipes. Is this adequate? Is this canker?

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Comments (2)

berndoodle
16 years ago
Try sanitizing your pruners before you deadhead. Better yet, if the plant isn't too tall and lanky, leave the pruners in the drawer and just snap off the spent bloom at the abscission layer.

The published information about sanitizing pruners says you need to soak your pruners for 10 minutes to kill pathogens. A household disinfectant is fine. It's inconvenient but it does work. I touch my roses with pruners far less than I used to.
lainey2 VA
Original Author
16 years ago
Interesting, berndoddle. Wish I had strong fingernails.
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