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These roses were just planted in March before the extreme heat set in. It looks like stunted growth with tiny leaves at the tips of the new stalks. Any idea what is causing this? Should I cut the stalks or wait until Fall? These are antique roses.
(unless it's herbicide damage, which, I've read, can mimic that)
I hope I'm wrong.
I’m going to research that. It doesn’t have the red foliage though. This is my first foray into antique roses. Would be a pity if I have to pull these out. This rose is Madame Isaac Pereire.
Well, I don't think you'll need to pull them out. You're dealing with extenuating climate conditions right now. We ALL are, one way or another this year.
I think the malformed leaves may be due to environmental heat stress but I'm no rose expert by any stretch of the imagination. With regard to those bubbled up malformed leaves I would cut off any short stems of the plant and any new long, thick "mutant monster" canes that are producing those malformed leaves. I'm seeing at least 2 mutant monster canes with malformed leaves and I'd cut them off regardless of whatever kind of disease or environmental distress is causing the malformation. Removal of the effected parts would allow the rose plant a fresh new start over again under better climate conditions when the weather changes.
Sometimes leaves bunching and crinkling is cause by aphids, so the first step is to take a very close look at the leaves. Aphids love roses. Aphids are tiny, so you have to look carefully.
I think it looks like thrips too. Has the rose bloomed normally? Thrips also attack the blossoms and causes them to be distorted. A systemic will help get rid of them, and if it is just a water or heat issue, it won’t hurt anything.
Thanks everyone for the suggestions. When the weather cools in the Fall I’ll come back with an update.
I should add that the only bushes with this type of growth are the Madame Isaac Pereire which are not climbers but known to have long stalks. I have two of these.
I have other rose bushes with different issues (leaf drop) which makes me wonder how much is due to the extreme heat.
Well, I don't think you'll need to pull them out. You're dealing with extenuating climate conditions right now. We ALL are, one way or another this year.
I think the malformed leaves may be due to environmental heat stress but I'm no rose expert by any stretch of the imagination. With regard to those bubbled up malformed leaves I would cut off any short stems of the plant and any new long, thick "mutant monster" canes that are producing those malformed leaves. I'm seeing at least 2 mutant monster canes with malformed leaves and I'd cut them off regardless of whatever kind of disease or environmental distress is causing the malformation. Removal of the effected parts would allow the rose plant a fresh new start over again under better climate conditions when the weather changes.
.
You were right. It was heat stress. The roses appear very healthy right now. Hopefully with another year of root growth they will fare better in our expected extremely hot summer. Thanks everyone for your suggestions.
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Update
