Frost Crack vs. Sunscald on Young Autumn Maple

2-yr-old Autumn maples: brown leaf spots, withering, trunk bark splitting/peeling.

Vertical winter split = frost crack or sunscald.
Young maples especially susceptible to sunscald.
Sunscald: late winter sun warms thin bark → active cells freeze at night → killed.
South/southwest side most affected.

Gently remove loose bark (faster healing).
Prevent next winter: Wrap trunk with burlap, kraft paper, or tree wrap (nursery-sold).
Shade south/west sides with boards/screens.

Tree usually recovers quickly. Frost cracking deeper but similar care.

Trees: Borer Damage and Decay in Autumn Blaze Maple; Autumn Blaze Maple Sunscald: Recovery in Progress; Maple Trunk Bark Peeling: Wound Care (Bark Scoring); Coral Bark Maple Winter Kill: Scrape Test for Life; Paperbark Maple Sparse Foliage and Heavy Seeding: Causes and Fixes; Coral Bark Maple Losing Bark: Sunscald, Borers, or Natural Exfoliation?; Maple Bark Peeling: Decay Fungi and Borer Prevention; Car Impact on Maple: Bark Stripping Repair and Borer Prevention; Large White Grubs in Maple Trunks: Flatheaded Borers; Maple with Holes and Black Bark: Borers and Surface Fungus

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