Q.Woody Shrubs Sick and Dying, Why?
First an apparently healthy rosemary started dying from the “trunk” out. I destroyed it but now a hedge of rosemary and cistus in a nearby spot are dying. .there seem to be some sort of white lumpy spots on the branches. What is it? What can I do to save the rest?
How long have the plants been in this area? Is it well drained? I've found that rosemary is very intolerant of wet feet in the winter, and cold with wet feet sounds the death knell. Don't know about the white lumpy spots unless it's mealybugs or scale that mimics mealies.
This could be a sign of sprayed pesticide off run from around the area leaching into your property