Birch -- Yellow Leaves
1. Lack of moisture. Birches are shallow rooted trees and require anywhere from 1 to 3 inches of water per week depending on soil types (more on sandy, less on clay) and temperatures (more during hot weather, less in cool periods).
2. Iron chlorosis. Birches require a slightly acidic soil. Check the pH level; ideally birches thrive between 5.5 and 6.5.
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