Troubleshooting Chlorosis and Leaf Spot in Red Tip Photinia

Step 1: Soil Test

Target pH 5–6. Also test for soluble salts. Photinias are in the rose family and prone to Entomosporium leaf spot—have a local nurseryman inspect.

Step 2: Check Drainage

Dig a 12-inch hole, fill with water. It should drain in a couple of hours. If it drains in 15 minutes, add organic matter to hold moisture. If still full next day, raise the bed.

Step 3: Rule Out Other Causes

• Herbicide drift?
• Sudden onset? Recent construction or drainage changes?
• Rodent burrows, sap oozing?
• Are other plants affected? (Soil issue would affect more than Photinias.)
• "Post-hole syndrome": roots circling in the original planting hole, strangling the plant (common at 5–10 years).

Superthrive Note

It's a bio-activator, not a fertilizer. Some swear by it for stressed plants.

Bottom Line

Find a reputable independent nursery—chances are they've seen this locally.