Blueberry Yellow Leaves: Iron Chlorosis from High Soil pH

Q: My 6-year-old blueberries have yellow leaves with green veins. Water or mineral issue?

This is iron chlorosis. Georgia soil has plenty of iron, but high pH (>6.0) makes it unavailable. Blueberries need pH 4.8–5.5.

Fixes:

• Soil test via Extension (404-897-6261).
• Quick fix: sprinkle 0.5 lb sulfur per 100 sq ft to lower pH.
• Temporary: spray foliage with iron chelate (e.g., Ironite™).