Kwanzan Cherry Dieback: Borers, Decay, and Environmental Stress

A 14+ year old Kwanzan cherry has half its canopy dead with brown leaves, the other half green. No borer holes seen, but 17-year cicadas damaged it years ago. The expert suspects internal decay from bacteria/fungus, or heat stress, rather than cicada damage. Bark wounds or amber resin globs would indicate borers.

Recommended Actions

• Inspect trunk and large branches for bark wounds or resin.
• Prune out dead wood if feasible.
• If dieback is widespread, long-term prognosis is poor.
• Water deeply during drought; fertilize based on soil test.

Cherries are short-lived in hot climates; this tree may be nearing its natural end.