Knowledgebase
Rose problem #752056
Asked May 25, 2021, 2:10 PM EDT
Scott County Minnesota
Expert Response
THank you for writing.
Could you send me close up of both sides of a couple leaves with white spots especially seen at bottom part of plant in picture 1.
Also how do you water these plants?
Do you use a spring Weed killer?
Thank you.
Hello,
I hand water the roses if there is not enough rain by putting a slow run hose by the plant base.
We do have a lawn service that come out to do the yard but they have been advised to stay away from the roses. However, I did start noticing the deformity after they were last out.
Dawn
From: Ask Extension <<personal data hidden>>
Sent: Tuesday, May 25, 2021 6:47 PM
To: Dawn O’Connor <<personal data hidden>>
Subject: Re: Rose problem (#0021987)
Thank you for writing.
I believe that your rose probably has edema from overwatering.
https://www.gardeningknowhow.com/plant-problems/environmental/treating-edema-in-plants.htm
Stop the slow drip hose. https://scvrs.homestead.com/WaterRightAmount.html
Herbicide drift occurs when herbicide sprays are windblown onto plants. It would be OK to stop the use of herbicides due to risk to your plants and to plants that pollinators need for food. https://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=42510#:~:text=Roses%20are%20extremely%20sensitive%20to,there%20is%20no%20quick%20cure
Alterenatively this could be aphids or rose stem girdler but these seem less likely because I do not see the insects or characteristic damage https://apps.extension.umn.edu/garden/diagnose/plant/annualperennial/roses/stemsswollen.html
I hope this helps
