I read that miniature roses are supposed to be very hardy, since they are growing on their own roots. Which means, I guess, that most other roses have been grafted onto a different rootstock. I don’t cover the minis in winter so I guess that would confirm that they are pretty hardy. They are susceptible, however, to all of the other rose problems such as aphids, black spot, etc., so I spray the minis when I spray all of the other roses.
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