• Coastal cities (Boston, NYC, Philadelphia, Baltimore) have warmed faster than the inland portion of this ecoregion and now read as a half-zone milder than published USDA maps suggest near urban heat islands.
• Mid-Atlantic salt-marsh and barrier-island ecosystems are stressed by sea-level rise on top of warming; coastal plant palettes need to plan for both saline incursion and warmer winters.
• Garden-relevant: native pitch pine, scrub oak, and bayberry remain on-trajectory; northern species (paper birch, white pine at low elevation) face cumulative summer-heat stress.