Prevention of powdery mildew on hydrangeas
I'm in Cronulla NSW. Some of my hydrangeas develop powdery mildew when the humidity increases during summer. Can I spray now as a prevention ? for example like I do with Lime Sulphur on roses. Thanks in advance
Flowers and Ornamentals • Diseases
Hi Robyn,
Thank you for contacting Yates.
Yes you can use Lime sulphur on all ornamentals including hydrangeas to prevent powdery mildew, the winter rate is 20ml/L of water.
Hope this helps and happy gardening.
Yates
yates
Answered: 25 Aug, 2021