St Patrick's buds never fully open. They are wrinkled and deep brown at the base. When I remove the petals the core is dead and blackened. I can see no bugs.
I am trying to attach a photo.
Are you in the UK? Because this problem seems to be going rampant in Nottingham!
Florist roses, garden roses, all sorts of HTs are getting this :(
To be honest, I was just about to start a topic on this!
This same thing happened to my "National Trust" HT :(
Not exactly UK. I'm in California....
So what is it?
I hope someone has a answer for this because it's quite puzzling. Have you had hot dry weather, Andrea?
Yes we have had hot dry weather BUT none of my other roses, HTs or Austins, have been afflicted. I hand water the raised bed that St. Patrick is in. (It is raised but built over soil) If I had omitted watering for this plant, would this happen? I water 2 or 3 times each week. So the most this plant, if I missed it, would have gone without water is less than a week.
It could be Botrytis Blight (Botrytis cinerea), I have this problem and I am in California.
Thanks for your answer TT. I looked up Botrytis Cinerea and the sites that had info on it said that there is an accompanying grey mold. I have no mold, the buds just
shrivel and die. And the center turns black.
Take some to the County Extention office. Let us know when you get an answer.
Botrytis normally affects the outer petals most. On flowers it produces brown rotten spots, not usually noticeable gray fuzz, I have never seen or heard of the problem you describe on a HT. Some cluster-flowering roses abort some buds for mysterious reasons. The neck tissue turns reddish and then yellow.
Thanks Michael and Kentucky.
I removed all the affected buds. I'll just have to see if it returns.