What is wrong with my knock out roses? All 4 bushes have brown leaves

Bonnie williams
by Bonnie williams
  4 answers
  • Janet Pizaro Janet Pizaro on May 16, 2017

    That look like they either have an insect infestation,improper watering or a change in temperature to make them dry out like that.First thing remove any dead or disease that you see. Look for any signs of insects.For safety measures,apply a three in one rose care system,fungicide ,insect control,and a fertileizer by Bayer

  • Sylvia Candler Sylvia Candler on May 16, 2017

    From this distance, it appears to be wilt damage. Can you provide a close-up pic of the damage for better identification? Are there any tell-tell signs of critters or mold or anything else?

  • SandyG SandyG on May 16, 2017

    You don't have pets or neighbor pets do you? From the area and up, looks like could be pet peeing on plants. Also if using weed killers, make sure to do on a non-windy day and keep away from flowers. Not sure if either is the answer, just suggestions to consider.

  • Becky Becky on May 19, 2017

    If the leaves are curly and the thorns and stems seen larger than normal, it could have a fatal disease... I can't remember the name but my knockout roses developed it and all that could be done was to dig them up-along with the dirt down a foot or so. An experienced nurseryman would know if you show him an affected cutting. Hope it's not.