You can also identify it by cankers that form on stems and branches.
39+ Black Spots On Hydrangea Stems. You can also identify it by cankers that form on stems and branches. Department of agriculture plant hardiness zones 8 through 10, and are all subject to black spotting on their leaves in the right conditions.
How To Identify And Treat Hydrangea Diseases Gardener S Path from gardenerspath.com
Blackspot, diplocarpon rosae, is a nasty fungus that manifests itself on rose bushes as black spots on leaves progressing to black spots fringed with yellow rings on both sides of the leaves. These spots are made up of blood vessels that have expanded, or dilated, and become visible on the surface of your skin. The larvae of this weevil injure hydrangea by feeding on eggs are laid in soft stem tissue.
Black spots on hydrangea leaves.
I think the limelights need to be in my garden next year! These hydrangeas are known as 'remontant'. They seem to be found most abundantly in gardens in the northern regions of the u.s. Nothing is simpler than preparing your hydrangea stems and placing them in a mason jar filled with fresh water.
