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Sugar Maples Dropping Green Leaves: Drought Stress or Fungal Issue?

Two maple trees are losing green leaves in summer; some leaves are fully green, others dried and light brown. Owner asks if it's fatal and if trees should be removed.

Primary Suspect: Drought Stress

Early leaf drop with green or browned foliage is a classic drought response. Severely stressed trees show color change in August; leaves may wilt, curl, brown, and drop prematurely.

Secondary Risks

Stressed trees are vulnerable to fungal pathogens that cause further decline.

Recommendation

If trees are valuable, hire a Certified Arborist to assess root health, soil moisture, and potential fungal infections. Do not remove trees based solely on one season's leaf drop—many recover with proper care.

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