Check for thrips. They are tiny little worm like bugs that will be in the petals. They suck them dry and they turn brown and don't open.

Thanks, but it's not on the buds-no buds yet. It's on the leaves and usually starts at the bottom of the plant.

Is it the LEAVES that are turning brown? Or the petals?

If it's the petals, Buford is likely correct. If it's the leaves -- can you show us a photo?

I noticed this morning that one of my knock outs was doing the same thing. Sure hope someone knows what's going on.

Sorry, I have no clue how to send photos. But it is definitely the leaves-lots of them and it's spreading. I thought maybe it was powdery mildew but it isn't white, the color is definitely tan.

We would really have to see it. The trouble is that there are MANY reasons why leaves would turn brown, and we could guess all week without hitting the jackpot.

If you have photos on your computer, you can click on the little photo icon, which will let you browse to the photo you want. If you don't have a photo, you can use a digital camera or cell phone to take on. OR you can scan one in a flatbed scanner, and upload it in the same way.

If you can't do that, I would take some leaves to a good garden center (NOT Lowes or Home Depot) and ask their opinion. OR a local Rose Society, and ditto.

Have you sprayed anything on the leaves lately?

I haven't sprayed anything. We have a conservatory in two that usually has a master gardener available so I will take some leaves in to show them this week. Thanks so much for all the answers and help.

o they look like this?

and then turn into this?

This is sawfly damage. They are a tiny green worm/caterpillar on the under sides of the leaves. They mow across the leaf and cause those brown spots. The damaged part eventually falls out and leaves holes. I tried to find one to photograph but I've sprayed a couple times already and couldn't find one. Thank goodness! They can do a lot of damage. You can pick them off and squish them or hose them off with a hard water spray. You need to do this several times over a few days to get them all. Or you can spray with insecticidal soap or chemicals. It's up to you.

or do they look more like this?

This is more like what sunburn, fertilizer or spray burn would look like.

No, there are no holes so it doesn't seem to be sawflies. I haven't sprayed them at all, it'sw the Midwest so probably not sunburn, and there really hasn't been much fertilizer on them. I think I remember having the problem last year,, too, but not as bad. I think it happened now after two days of an all-day rain.

Maybe your having soil drainage problems?

Sorry focused on the fact it happened after rains instead of leaf damage color... Yes waterlogged soil does cause mostly yellow leaves...

Waterlogged foliage is yellow. I suggest contacting your local cooperative extension for testing - you may have a soil-borne pathogen Good luck.

I just went to our town conservatory and brought a sample of the tan dried out leaves. They think it's sawflies. But I don't have any holes. The non-organic remedy was neem oil and that's what I already sprayed them with the other day. So I guess I"ll find out soon if it helped.

You can have the dried areas without holes and it still be Rose Slug damage..

If spraying you can use Safers insecticide soap or Spinosad.... Be careful of spraying oil sprays in warmer temps as they can burn leaves...

I would not use any type of oil unless the temps for the next week are going to be in the low 70s or below. Anything higher than that and your leaves will burn. I have cooked rose leaves with oil solutions at temps of 76 and up.

I seem to have this problem too. Most of my roses have a few leaves like that but no holes. I just snipped off the leaves. Hopefully that will work.

Paper thin. Did anyone figure anything out? We’ve had rain but not an over abundance in years past. These plants are about 15 years old.

Sawfly damage likely.

HU-855363151

2 hours ago

Paper thin. Did anyone figure anything out? We’ve had rain but not an over abundance in years past. These plants are about 15 years old.

FYI, I don’t believe she was ever part of this discussion. If she was, she must have deleted her comments.

I don’t think she posts here anymore. At least under that name. She may have changed it at some point after they found out what the problem was. I heard it was malabsorption.

You're hilarious rifis. Oddly enough I had the exactly same thing on a small, but long cane of New Dawn. I just cut it off, but couldn't figure out the cause. Didn't seem to be cane borer, but who know. the rest of the two plants seem fine.