by Mark Stare
(Bel Air, MD)
Arborvitae showing brown patches
Last year we removed over grown 20 year old Leylands. They were blocking the sun completely from our back yard. Had the soil tested and it was fine. Planted Arborvitae in the same spot. They sprouted new buds this spring so I put the weed block mesh down and mulched. Since then we have gotten brown spots.
I have been watering twice a week about 5 gallons per tree each time.
How do I fix this and get my plants healthy again?