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Avatar for RuthieB
May 30, 2020 12:17 PM CST
Lancashire
Help!
My roses leaves have started to turn brown (not sure if black spot) and the new shoots are very shrivelled. It has had two doses of rose clear (don't want to do another yet) and I've been using soapy water on the new shoots. There's only the odd aphid on the newer shoots which won't have had rose clear on. I tend to just squish them.


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Last edited by RuthieB May 30, 2020 12:21 PM Icon for preview
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May 30, 2020 2:44 PM CST
Coastal Southern California (Zone 13a)
Ruthie -- What has your weather been like?

I guess that could be blackspot ... what do others think? To me, it looks more like downy mildew. Have your conditions been very wet?
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May 30, 2020 4:12 PM CST
Name: seil
St Clair Shores, MI (Zone 6a)
Garden Photography Region: Michigan Roses
No it doesn't look like black spot to me. I'm wondering if it isn't spray burn? If it's been hot and sunny anything sprayed on the leaves could cause burn. Even soapy water.
Avatar for RuthieB
May 30, 2020 4:21 PM CST
Lancashire
Ah okay. Will they recover? We have had quite warm weather (for the uk!). I only planted it about a month ago so have been making sure it is well watered (not in the heat) but I maybe have sprayed soapy water in bright sunlight. Am I watering too much do you think? My dad said to make sure it gets plenty of water as they are thirsty.
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May 30, 2020 4:33 PM CST
Name: seil
St Clair Shores, MI (Zone 6a)
Garden Photography Region: Michigan Roses
No, if the rose has adequate drainage you can't really over water it. Roses love a lot of water but do not like to have their roots sitting in a pool of water. Did you do a drainage test for your planting hole?
If it is unusually hot extra water may be necessary. Do stop the soapy water. Aphids are not really that big of a problem. The soap may be doing more harm than the aphids. The existing leaves will not get better but the rose will grow new ones to replace the damaged leaves in a few weeks.
Avatar for RuthieB
May 30, 2020 4:57 PM CST
Lancashire
Thank you
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May 30, 2020 5:03 PM CST
Coastal Southern California (Zone 13a)
Come to think of it -- might the soapy water have caused the damage?
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May 30, 2020 7:14 PM CST
PNW (Zone 8b)
One of my rooted cutting from the neighbor has similar problem. I spray nothing so I think it is some kind of fungus disease. It emerges after raining and those tiny spots expand to turn the leaves completely black. I just pull them off. I'd guess it's downy mildew or a weird BS.
Avatar for RuthieB
May 31, 2020 4:33 AM CST
Lancashire
Should I remove the affected leaves?
Avatar for porkpal
May 31, 2020 7:40 AM CST
Name: Porkpal
Richmond, TX (Zone 9a)
Cat Lover Charter ATP Member Keeper of Poultry I was one of the first 300 contributors to the plant database! Dog Lover Keeps Horses
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I wouldn't. As long as they are green, they are helping to nourish the plant.
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May 31, 2020 8:58 AM CST
Name: David Tillyer
New York City (Zone 7b)
Since it seems to be on your front door step, you might want to snip the shriveled up bit in Picture #2.
Otherwise, Porkpal is right, the leaves are still doing their job.
Avatar for RuthieB
Jun 4, 2020 11:51 AM CST
Lancashire
Should I remove the affected leaves?
Avatar for RuthieB
Jun 4, 2020 11:51 AM CST
Lancashire
Thank you
Avatar for RuthieB
Jun 4, 2020 11:51 AM CST
Lancashire
Ah okay. Will they recover? We have had quite warm weather (for the uk!). I only planted it about a month ago so have been making sure it is well watered (not in the heat) but I maybe have sprayed soapy water in bright sunlight. Am I watering too much do you think? My dad said to make sure it gets plenty of water as they are thirsty.
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Jun 4, 2020 12:59 PM CST
Name: David Tillyer
New York City (Zone 7b)
Looking at your weather in Lanacshire, it's about13-14 degrees C or about 55 degrees F. It also seems to be nice and humid (78%), so I don't think you need to water abundantly. When you do water, water the roots, don't shower the plant. And, yes, clip off the ugly bits.
David
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