I planted a 25 gal weeping willow last fall. It now has rusty looking spots on the underneath side of the leaves and some of the leaves are yellow. How do i eliminate this problem?
I planted it in the ground 1.5 yrs ago from a 5 gal container from home depot. Today it has sap seeping from four areas on the trunk, some branches and leaves are brittle & dry. I water it once per wk and it's in full sun. I'm in Marin County, California
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