It could just be the hot weather. The roses are too stressed by the heat, and mine are doing all kinds of ugly things too. Wait until it gets cooler and see if that doesn't bring a great improvement.

Ingrid

Flora -- Some roses have little vase life.
But there are things you can do which will increase vase life for most rose blooms (and other flowers, as well).

First, when you cut your rose blooms, cut them when the roses are still fairly tight.
If they're already perfectly open, there's nowhere for them to go but down-hill.

Second, you should stick the cut end of the stem UNDER WATER, and RE-CUT it. Your new cut should be on a 45-deg angle, so as to expose as much tissue as possible.

This will will eliminate a bubble of air which prevents the bloom from drawing up water.

Once the stem is re-cut, place the blooms in tepid-to-warm water, preferably so that the water covers the stem and foliage right up almost to the bloom.
Those tall, narrow French Florist buckets are perfect for this. But you could even use a tall, fairly narrow vase.

Sit your roses in a cool, dark place, and allow them to "repose" there for at least a couple of hours. When you take them out and arrange them in your vase, they should be full of water. Also, dirt and debris that might carry bacteria, or at least look bad, are probably gone.

Roses last best when the water is a little on the acidic side. If your water is alkaline, a small shot of lemon-lime soda will acidify it, and provide sugar to feed the blooms.
And bacteria in the water will hasten ageing, so a small amount of cheap gin (SERIOUSLY!) will help to preserve them.

Jeri

Here is a link that might be useful: French Florist Buckets

Thank you, Jeri. But you misread my post. They open beautifully when I cut them and bring them indoors. They DON"T if I leave them on the plant.

AH.
Well, in that case, it's probably weather-related.
But it is also possible that your plant isn't getting as much water as it needs in hot summer weather.

Right now, in CA, roses open and turn into potpourri in a few hours.

Jeri