Late August · Tropical warm-season Watch

Hawaii lawn conditions

Updated

Match water to windward vs leeward exposure; mow on schedule; scout insects and fungal spots after wet spells. Honolulu-class Sunday near ~84 °F showers (~41%) / Monday ~84 showers (~41%) / Tuesday ~85 showers (~43%).

Do this week

  1. Water leeward/dry exposures on wilt; cut back windward lawns after frequent showers.
  2. Mow frequently enough to stay within the one-third rule for bermuda, zoysia, or St. Augustine.
  3. Split light nitrogen only when turf is actively growing and not waterlogged.
  4. Scout for tropical sod webworm and armyworm chewing after muggy stretches.

Watch for

  • Uneven irrigation from trade winds
  • Fungal leaf spots after prolonged leaf wetness
  • Nutsedge in chronically wet pockets
  • Thatch buildup on aggressive bermuda/zoysia
Regional notes & context

Why this week

Hawaii lawns do not follow a continental dormancy calendar. Late August is still active growth—manage water by exposure and keep scouting rather than copying Mainland fall stop dates blindly.

Seasonal notes

  • Island and elevation differences matter more than the statewide label.
  • Follow county water rules and local extension species sheets.

Last updated

Content refreshed August 23, 2026 (Sunday midday) for Hawaii. Educational orientation only—not a site-specific diagnosis.