What causes brown spots on hydrangea?

Westie
by Westie
  2 answers
  • Janet Pizaro Janet Pizaro on Apr 21, 2017

    Brown spots are usually a sign of fungus or an insect infestation. Look carefully on the underside of the leaves,check for webbing etc.

  • Maria Noble Maria Noble on Apr 21, 2017

    Small, round, brown or purplish spots on hydrangea leaves are common. Often, affected leaves turn yellowish green and fall off, although the plant usually survives. The problem is caused by a fungus that spreads via spores in wet or humid conditions.