Powdery mildew caused by heat stress??? Someone told me it can happen when the leaves of a plant are damp and the roots are dried out, which if there has been storms raining on the leaves but you aren't watering the root, could happen?

Thank you Joey. No, I don’t see any powder on it. The leaves are like paper now, just dry....

Check behind the leaves. Spider mites can do that.

Thank you Dianela! I will check. I didn’t see any bugs on it. going with my flash light to find these nasty bugs!

I’m not sure about the dryness... But Japanese beetles and flea beetles have been leaving some of my hydrangeas full of holes similar to your rose. I’ve been waging war against them! Neem oil on the top and underside of the foliage during the later part of the day after she stops getting full sun will deter them and kill spider mites. Diatomaceous earth spread around the plant can act as a barrier against such crawling pests and kills them after exposure by cutting into the exoskeleton and causing dehydration. Will not harm beneficial insects that don’t crawl, like your bees and butterflies. Worth a shot!

@Shay (5a NH) i can’t believe they are eating hydrangea!! 😱 I have 5 on another bed they seem unaffected. The holes are from sawfly damage early in the season. I feel like they can’t get a break. First sawfly and aphids, now the scorching heat and the beetles & some caterpillars that are eating the buds lol! They are also first year, I read in here that they get more resistant as they age. Thank you for the tip. I will try the diato on the base for sawfly next year

They’re going for all six of my paniculata, but none of the macrophylla... so frustrating. The DT and neem is controlling it, but I still end up needing to hand pick a small few in the morning and at night. The DT will take care of your beetles and caterpillars though! You can sprinkle on the leaves at night to deter whatever decides to feast on them.

I checked my rose this morning and I also have a couple of dry leaves on one cane... I wonder what the issue is! Did you stick your finger a few inches below the soil surface to check the root balls for dryness? Even though it rained, it might not have saturated the root ball enough if the foliage acted as an umbrella.

Sorry I apologize I did not see all the images and misunderstood what I saw. I thought I was looking at weird discoloration which the spider mites do, they do not open holes. The holes actually could be from sawfly damage and that explains why you don’t see any bugs.

@dianela7analabama thank you. I‘m aware of the sawfly damage. What I’m worried about is the dry leaves. The whole plant dried up from night to day. I think is heat stress since temperature has been around 90s. I just don’t understand why only 1 plant. I’m worried she is going to die. She was ver dry today. I will update w another picture tomorrow. thank you for all the help

Give it at least 2 gal water daily for a few days and see what it looks like.

2 days later:

Most of the leaves are gone..

is this too much water or too little water? The sprinklers are on every day, all other roses seem fine. Ugh, am I losing this plant?

thank you @Sheila z8a Rogue Valley OR will try that every morning. I hope I can save her!

I realize I am not in your area, but sprinklers work better for lawns than roses. Here, your ailing rose's emitter would not be working if the rose looked like that.

Hi - I live in your zone and I know what you mean about the mega rains last week. I try to water twice a week if we don't have rain, but usually I only do it once. We got so much Friday I haven't watered since and my rose leaves are all fine. I've never seen leaves look like that unless they got hit with some sort of weed killer or something else? Especially if it's just one rose in a group. Wouldn't a lack of water (or too much) also affect the others? My plants are in full sun all day and they are not that dried out and if your others are fine, maybe it's something else?

Do the canes look dry or is it just the leaves?

@threeboxerlover DEZ7a right? We had so much rain I didn’t even think of watering. No insecticides or fertilizer lately. I haven't done much bc it has been so hot Lately. I think she is basically drying up. The canes looks to be drying too

Ceres, those canes do seem dessicated. Are you sure something isn't damaging the roots?

@Vaporvac Z6-OhioRiverValley is what I’m thinkin. going to dig it out today and move it to a pot. Something has to be going out to dry out this much

It turns out the rose was drowning 😫😫 I dug her out today and there was water at the bottom, still hasn’t drained. so I guess I have a Drainage problem. Now I have to worry about the other 5 roses I have planted in this area. How do I address this? I read sand? Would sand just in the hole help?

thank you guys! I hope I was able to salvage the rose.

Did a pipe break?

Wow! Thank goodness you dug her up. So sorry!

I have a similar area where it's boggy. I'm currently digging many up the roses there as they suffered in the Spring. Mine is due to compacted clay and rain. My friend in KY has the same and I had him dig very deep narrow holes at the bottom of the rose holes with a pole digger which he then filled with gravel since he can't move his. This seems to have worked very well. He also replanted them raised above the ground level to for a sort of raised bed. Why do you think it's so wet?

@Vaporvac Z6-OhioRiverValley I also Have clay soil (I think 🤔) , why is so wet I don’t know. I have noticed some of my lawn in front of the garden beds seems to be always kind of wet. I might have to get someone her to see it.... ugh. for now, I will remove the roses and maybe plant them back in on fall raised like you said....