United Kingdom 
why are there brown spots on my periwinkle?
24 Jan, 2010
United Kingdom
why are there brown spots on my periwinkle?
24 Jan, 2010
after the weather they could be frost damage. These tend to be pretty hardy and pest free. if only a few leaves are affected then pull them off and throw them in the household bin. dont compost just incase it is a fungal infection.
24 Jan, 2010