It's probably the summer heat. Where is your location? Purple roses burn easily in the heat and petal formation changes in summer. I'm in a hot zone, so I have a purple rose in an area in my garden that has filtered light from a nearby tree in the afternoon.

If you like, you can add your location and/or zone to your name. Otherwise, you will get asked that question a lot. Location is useful information for someone to know before replying to your posts. Welcome to the gardenweb!

Thank you so much! I'm in New York City. Where should I add my location? I just added it to About Me but I'm not sure if there is another spot for that information. Regarding the roses, I scooted them into a shadier spot but i don't have any way to get dappled light on my balcony - it's either full light or shade.

You can add your location and climate zone by changing your user name to include them, so they will be on every post.

There is nothing wrong with your roses - roses react to changing weather sometimes by changing the color of the blooms. I think any rose would be better off in sun than in total shade. Just make sure they are getting enough water.

Jackie

The only thing I could think of is thrips damage, which leaves brown edges on rose petals that resemble burns. But I don't see anything like that on your roses. I agree with Jackie. Diane

The reason why I have my roses in a location where they can get filtered sun in the afternoon is so they can survive my summers. Your roses should be fine in your cooler location. Here are examples of how roses change with the weather:

Rhapsody in Blue in early spring

Warm spring day, almost 90 degrees F. The blooms have burnt petals, but still look good from a distance, lol. My other, non-purple roses do much better with the sun. Nevertheless, Rhapsody in Blue is one of my favorite roses.

Summer, 108 degrees F

This is my friend's Moonstone rose in spring:

This is her Moonstone rose in summer:

What a difference weather makes! Roses in my zone will look good again in the fall. Any blooms now are very small or don't open at all. During summer, I enjoy the photos of roses from people who live in cooler zones.

Bonnie

That's amazing. I had no idea they changed so dramatically! But still my roses seem sad, and lots of leaves have turned yellow. Perhaps it's a watering issue. I'll scoot them back into the sun per your suggestions.

I assume they are in pots? Make sure they drain well - get some "pot feet" (little clay thingies - 3 of them go under the edges of each pot to keep them off the ground, so they will drain). Any nursery should have some.

Then, when you are sure the pots are draining, make sure they are getting enough water. Yellow leaves can be from standing water, or from not enough water.

Oh, how big are the pots they are in?

Jackie

I'm not sure how big but pretty large - around 16 inches across, a foot high, with space underneath to drain. I stuck my finger underneath the pot and it's always dry. I'm not sure if I should be watering daily, or watering more when I water, but it does get dry quick even a few inches down into the soil.

Interesting change in moonstone. Either way, it is still a beauty.

Pretty! The anticipation of each bloom is exciting to me. That's why I love roses so much. Thanks for sharing :-)