To keep your lilacs looking their best, they need to be pruned, fertilized and shaped almost every year, soon after they are done blooming in the late spring.
Most “sick tree” problems can be traced back to underlying stresses that have reduced the tree's vigor, making it more vulnerable to diseases or insect pests.
This article briefly discusses the most prevalent madrone disease problems, then offers a broader perspective on the health of this southern Oregon native.
Q: I have a California lilac tree in my back yard. A thick root is underneath the pavers and lifting them up. Will I kill the tree if I cut out that root? I sure don’t want to kill it!