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Japanese Maple Chlorosis Diagnosis: Overwatering and Soil pH Correction

Three 2-year-old 'Crimson Queen' Japanese maples in Maryland show yellowing leaves (chlorosis) with weekly watering. Diagnosis and treatment.

Diagnosis: Likely Overwatering

Chlorosis = nitrogen unavailable to plant
Causes: Overwatering, pH imbalance, or drought
Photo evidence suggests overwatering

Treatment Protocol

Reduce watering frequency
Apply NPK fertilizer
Mulch with acidic peat/fertilizer blend (hydrangea-type products)

Why This Works

Japanese maples prefer acidic soil (low pH)
Acidic conditions improve nitrogen uptake
Hydrangea products formulated for acid-loving plants

Monitoring

New growth should green up within weeks. Adjust watering to maintain moist (not wet) soil. These maples hate "wet feet."

Landscaping and Design: Japanese Crimson Maple Failure to Leaf Out: Diagnostic Checklist; Dwarf Japanese Maple Varieties for Atlanta Afternoon Sun; Heat-Tolerant Japanese Maples and Oleander Survival in North Texas; Crimson Queen Japanese Maple Turning Green: Excess Nitrogen or Shade; Japanese Maple Care for Vibrant Color and Winter Hardiness; Japanese Maples: Elegant Dwarf Acers for Every Garden; Japanese Maple Trees: Varieties, Uses, and Growing Tips; Cutleaf Japanese Maple 'Crimson Queen': Weeping Laceleaf Elegance in Deep Red; 12 Sun-Tolerant Japanese Maples for Brilliant Color in Full Sun; Japanese Maple 'Crimson Queen': Weeping Dwarf with Rich Crimson Foliage

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