London (change)
Today 9°C / 5°C
Tomorrow 10°C / 10°C

Rose bloom balling

Symptoms

Apparently healthy rose buds develop and fatten but fail to open. They eventually wither or drop off.
Find it on: roses
Time to act: summer

Overview

Balling is triggered by cool, damp conditions, often in a partially shady site, where water-saturated outer petals fail to dry out before being scorched by the sun. The mushy plant tissue dries to form a stiff straightjacket around the petals, preventing the flower from opening. An invisible soft, slimy layer of mycelium then fuses the petals together. The problem is most acute on roses with a multitude of thin petals.
Solution
Apparently healthy rose buds develop and fatten but fail to open. They eventually wither or drop off.
Organic
The only option is to cut off the damaged buds and wait for new ones to develop. Be careful not to trigger the problem by splashing water onto the buds when watering your roses. If damaged buds aren't removed, there's a risk that grey mould may develop and cause the stems to die back. If this happens, prune back shoots to healthy growth.



Discuss this problem

Talkback: Rose bloom balling
Your comment will appear after a quick registration step

cherrypip 24/11/2011 at 15:28

my light pink roses have developed darker pink splodgees and rings on them,dose anyone know what this is??

valatwell 24/11/2011 at 15:29

I'm looking for a pink rose bush, with good scent but not too thorny. Also with very good repeat flowering. Any suggestions

GeorgieE 13/05/2012 at 22:57

We had a hard rain about three weeks ago other than that my rose flowers do not get water on them & they are in a full sun area.

Alina W 14/05/2012 at 10:05

The staining is due to rain, as is any balling that you get. Drier weather will solve the problem, although individual flowers will stay stained.