Newly Planted Leyland Cypress Browning in 100°F Heat

Ten 6-foot Leyland cypresses planted 2 months ago show basal browning in 100°F+ temperatures. Owner questions watering frequency.

Watering Protocol for Establishment

• Method: Pan test—sprinkler until 1" collected
• Frequency: Every 3 days if no rain
• Mulch: 3" organic (pine straw), not touching trunk
• Critical: Leylands cannot tolerate saturated soil

Diagnosing the Browning

• Too much water: Yellowing, lower needle drop, soggy soil
• Too little water: Similar symptoms, dry soil at 4–6"
• Transplant shock: Temporary, if top growth remains green

Immediate Action

1. Check soil moisture at 4–6" depth under mulch
2. If wet: stop watering until dry
3. If dry: apply 1" water
4. Monitor top foliage—green tips = recovery likely

Leylands are sensitive to both extremes. The pan method eliminates guesswork. Mulch is essential for moisture moderation in extreme heat.