Italian Cypress Browning in Austin: Canker or Overwatering?

Two Italian Cypress Turning Brown Despite Regular Watering

An Austin, TX homeowner planted two Italian cypress last spring. They water 2×/week all winter, use cedar mulch, and now see browning. They wonder if mulch holds too much moisture or if they're overwatering.

Primary Suspect: Cypress Canker (Seiridium cardinale)

• Fatal fungal disease spread by wind-borne spores.
• Enters through bark wounds; girdles branches.
• Symptoms: yellow/brown flagging, resinous cankers, progressive dieback.
• No cure. Prune out infected branches well below visible damage to prolong life.

Watering & Mulch Assessment

• Overwatering: 2×/week in winter is excessive for established Italian cypress (drought-tolerant). Reduce to 1 inch/week only if no rain.
• Cedar mulch: Not the cause. Proper mulch (2–3″, not on trunk) conserves moisture and moderates temperature.

Action Plan

1. Inspect for cankers (sunken, resinous lesions on bark).
2. Prune dead/browning branches to healthy wood; sterilize tools between cuts.
3. Switch to deep weekly watering only during drought.
4. Maintain proper mulch.

Key Takeaway

Browning Italian cypress in Austin is likely cypress canker, not mulch. Reduce watering, prune infected wood, and monitor. No chemical cure exists.