smart: After I prune my mini rose bush, the stems that were pruned eventually turn dark brown or black and die. Sometimes the whole stem will eventually do this and die. How do you prevent any of the cut stems on the bush from completely dieing off? The bush gets plenty of sunlight, are planted outdoors and they get watered at the base. The temperature outdoors has been about 91 degrees.After pruning a mini rose, stems turn brown or black?There are two important factors that could contribute to the damage to the stems of your mini-roses. What kind of shears are you using? and how sharp are they? The main types of pruners are anvil, and bypass. Anvil's have one sharp blade and one flat. The sharp one presses the branch against the flat one, then cuts through sorta like a guillotine. Those aren't the prefered pruners. The other pruners, bypass, are more like scissors in the way that they work. They are better. In either case if the shears aren't sharp, they'll do more crushing and less cutting. Pruners should be sharpened at least once per year. Anyplace that sharpens scissors should be able to sharpen your shears. If you're not sure where to go, try Joanne Fabrics... the same folks that make quality scissors (Fiskar etc) also make pruning shears, they should have recommendations on where to take them to sharpen them. The other factor is cleanliness. You want the Doctor or Dentist to have sterilized instuments before they cut into you right? Diseases, whether animal or plant, are communicable that way. So, when was the last time you cleaned your pruners? Every week? At least once a month right? A little rubbing alcohol or bleach solution will do the trick. I keep a bottle of dollar store rubbing alcohol with my pruners, a splash goes a long way. Monitor your water and fertilizer, and your plant should recover. I hope that this helps Good luck-After pruning a mini rose, stems turn brown or black?Pruning should only be done in cool weather, between 0c and 40c, plus by the sound of it you need to sterilise your pruners after each cut.After pruning a mini rose, stems turn brown or black?Pruning ANYTHING when it's hot is not good. Anytime you prune a plant, you're cutting it. And any time you cut it, it's going to lose water. The warmer the temps, the more water loss. I'm not surprised to hear that the stems die back. If you can help it, wait until temperatures are in the 50's, or at least the 60's before you do your pruning.|||you should be able to cut roses any time of the year.we all cut roses for the vase inside.the reason youre getting dieback is you secateurs may not be sharp enough and not leaving a clean cut.leaving to much stem can also create a window for disease to enter.cut out all the diseased and dying wood and spray with a fungicide.always bleach your tools before and after to stop the spread.