Roses forum→Is my mini rose bush salvageable?

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New York, NY
Jahvol
Oct 23, 2020 8:19 AM CST
Hi all- new poster here!

My rose bush seems to have powdery mildew and black spots on leaves. I've bought the fungicide pictures below, spraying once a week yet I'm not seeing progress.

I'm wondering now, is the plant dying slowly? Not getting blooms anymore and leaves are shedding. I'm not sure how to save this. Sad

Thank you in advance!
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Name: Sue Taylor
Northumberland, UK
Charter ATP Member Bulbs Bookworm Amaryllis Houseplants Annuals
Garden Photography Lover of wildlife (Black bear badge) Foliage Fan Bee Lover Region: United Kingdom I was one of the first 300 contributors to the plant database!
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kniphofia
Oct 23, 2020 8:23 AM CST
Can you tell us more about how you're caring for it and where it's kept?
New York, NY
Jahvol
Oct 23, 2020 8:28 AM CST
Absolutely! It's kept on a balcony with a lot of sun (about 75% of the day I'd say). I care for it by watering about once or twice a week, depending on how much it has rained. I just recently started to add Miracle grow rose food to the water. Trim the wilted blooms once a week about an inch down.

I was misting every so often, but stopped once the powdery mildew appeared.
[Last edited by Jahvol - Oct 23, 2020 8:28 AM (+)]
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Name: Dennis Brown
The Big Island, Hawaii
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kohala
Oct 23, 2020 1:14 PM CST
I am a novice at growing roses. But if it were me I would strip all of the leaves from the canes, trim them to a manageable size, and eliminate the dead and crossing canes. An option might be to spray the roses with a fungicide to see if you can prevent a recurrence of the maladies. Also, don't mist your roses and try to water in the morning so that the leaves stay as dry as possible. There are many members of this forum who are much more knowledgeable than me. I'm sure they will correct my suggestions and suggest better solutions.
Coastal Southern California (Zone 13a)
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jerijen
Oct 23, 2020 2:28 PM CST
It's pretty badly affected with blackspot. But before even addressing that . . . Where did you get the plant? And is it in the original container? Or have you potted it up? And how large IS the container?

I would definitely remove the affected leaves. But if you're growing this on a balcony, and if you're going to have to constantly use sprays to control fungal disease, you might consider looking for a variety that is resistant to the fungus, because those sprays aren't something you want to be breathing a lot of.
Name: Daniel
Los Angeles (Zone 10b)
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Dciau1
Oct 23, 2020 5:04 PM CST
I think (but don't trust me 100%, i'm an beginner) that a clean up would be helpful (:

Pick up the dried/fallen leaves off the pot soil

Maybe cut off any dead wood (the brown canes in the top)
and remove the affected leaves

Use fungicide specifically for black spot and powdery mildew (not sure if that's what the white stuff is 100%)

Just make sure to be extremely sanitary with the clean up and sanitize your pruners etc.

Also, I would wait for other responses before doing this :P
There are way more knowledgeable people here!
Name: seil
St Clair Shores, MI (Zone 6a)
Roses Garden Photography Region: Michigan
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seilMI
Oct 23, 2020 5:29 PM CST
OK, STOP! It is the end of October in NY, maybe zone 5 or 6? The plant is slowing down and getting ready for winter. The weather is choice for fungal infections, warmish days with cool nights and lots of dampness. You are fighting a no win battle. If you wish you can strip the leaves but otherwise just leave it alone and let it go dormant naturally. You say this is potted and on a balcony? What procedure are you thinking of using to winterize it? It will not survive all winter unprotected on your balcony.

Throw away the 3 in 1 product. They really aren't very good. If you have a fungal infection use just a fungicide. If you have insects ID them and use the proper insecticide for that bug. If you want to fertilize find a good well balanced fertilize and use it according to all instructions. Those combo products do not give you any control over what you're giving you plants.
Coastal Southern California (Zone 13a)
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jerijen
Oct 23, 2020 6:29 PM CST
WHAT SEIL SAID.

Really. She's right on every count.
Name: Daniel
Los Angeles (Zone 10b)
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Dciau1
Oct 23, 2020 7:49 PM CST
Yes! Listen to Seill haha
New York, NY
Jahvol
Nov 7, 2020 12:32 PM CST
Thank you so much! Great advice.

I plan on cutting it back a bit to remove the worst infected and winterizing by bringing indoors (we have large south facing windows).
Name: Porkpal
Richmond, TX
Charter ATP Member Dog Lover Cat Lover Keeper of Poultry Keeps Horses I was one of the first 300 contributors to the plant database!
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porkpal
Nov 7, 2020 1:17 PM CST
Roses don't like to be indoors. Do you have a garage it could live in after it goes dormant?
Porkpal
Name: seil
St Clair Shores, MI (Zone 6a)
Roses Garden Photography Region: Michigan
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seilMI
Nov 7, 2020 3:48 PM CST
I have to agree with porkpal, roses are not houseplants! First off, unless you provide it with artificial light it won't get enough light even in a south facing sunny window. The daylight hours are too short and the angle of the sun too low for the plant to sustain growth inside. Second, you can not keep the humidity high enough for the rose. I'm not talking about watering the pot. I'm talking about the humidity in the air. Houses are too dry. The third problem will most likely be spider mites which seem to be inevitable with indoor roses. Is there any protected spot that you can allow the rose to go dormant for the winter? A garage or shed maybe? You need to insulate the pot somehow to protect the root ball and block the prevailing winds to keep the canes from drying out. And don't cut it back. That will not get rid of fungal diseases and you need that cane for the springtime come back.
Name: David Tillyer
New York City (Zone 7b)
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BigAppleRoseGuy
Nov 11, 2020 5:59 AM CST
Hi Jahvol
I'm late to the discussion. You say you have this rose on a balcony and that your windows face south. Does your balcony face south? That would be helpful. How high up are you? I'm on the 37th floor and we have a devil of a time keeping roses going on our balcony. We get punishing winds and strong sun. The winters are cold and brutal. I like Seil's idea of removing the leaves; however, private garages and sheds don't exist in New York City. I say try to put some protection on the balcony fence to cut the wind, but not the meager sun of winter. A blanket over the pot, protecting but not smothering the surface of the soil would help. Then send good vibes all winter, water it very sparingly, and make plans for a visit to a nursery in late March or early April for its replacement.
Peace, David

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