HELP with red leaves?

5 years ago

I purchased a Fragrant Cloud HT on sale last fall, it had some black spot on it, but I figured for the discount price I could save it. I treated it and planted into the ground for winter.

This spring when I removed the rose cone and the mound of mulch, it had already began to sprout leaves everywhere. I cut off what didn’t look healthy and sprayed the rest (closer to the evening). I transplanted it into a pot with much more sun.

The weather is more consistent now, but there have been a few nights in the past 2 weeks where it got down to 37 degrees F.

Are these red leaves normal, cold damage, damage from spray every 2 weeks, or should I be worried about rosette disease (witch’s broom)??

The canes do not look overly thorny or deformed. The leaves don’t appear deformed, just miscolored. It’s too early in the season for blooming.

Can anyone help me?

Featured Answer

User

5 years ago

“This spring when I removed the rose cone and the mound of mulch, it had already began to sprout leaves everywhere.”

that’s your answer right there: sudden change from low light to very high light, and change in humidity, wind exposure. This is just environmental damage. Not Downy Mildew unless all those leaves are rapidly dropping off.

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Comments (6)

joeywyomingzone4
5 years ago
It doesn't look like RRD to me...my first guesses would be cold damage, or possibly fertilizer burn if you planted it with anything in the hole and the roots are just encountering it and getting scorched??? I don't spray so I am not the best person to give advice on spray damage.
Moses, Pitt PA, cold W & warm/humid S z6
5 years ago
Possibly downy mildew, which is encountered in the springtime more than during the fall, and wanes significantly during summertime on its own without spraying. It, like powdery mildew, is not that easy to control, even with diligent spraying.

Moses
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rifis (zone 6b-7a NJ)
5 years ago
https://twitter.com/utplantdoc/status/988903617158578176

Now if someone could induce him to begin posting here
Nicole z.5b IL
Original Author
5 years ago
No fertilizer in the pot I planted it in.
I’ve never heard of downy mildew but it does look like it. I’m contemplating just removing the entire bush. Was this clearance purchase worth it?
Would you guys SP it or leave it? The planting mix was expensive (a variant of the 5-1-1 soilless mix) and I mixed it myself after collecting ingredients all winter long. The soil is more valuable to me at this point than the Fragrant Cloud.
Dingo2001 - Z5 Chicagoland
5 years ago
Nicole I would suggest skipping the rose cones next year. You can use some mulch over the top to protect them once they go dormant. The cones act like little greenhouses and you can get some weird growth and things happening under there.