May: Heat begins — protect, shade, and pre-stage.
May is when Arizona reminds you it's a desert. Daytime temps cross 100°F by mid-month, soil moisture evaporates fast, and any project not under shade gets harder. The month is about protecting what you've planted and pre-staging for monsoon.
What to do — and why it matters in Arizona.
Switch to summer schedule, deep + infrequent.
Encourages root depth; shallow daily watering causes fungal collapse.
Second citrus feeding.
Mid-May is the canonical 2nd-of-3 Arizona citrus feeds.
Stop planting new desert trees until October.
Transplant survival drops below 50% after May 15 in the lower Valley.
Phosphate + algaecide preventive treatment.
Monsoon dust loads phosphates within weeks — get ahead of it.
Raise mow height to 1.5".
Longer blades shade soil and cut summer water needs 10–15%.
Inspect transformer ventilation.
Heat-soaked transformers fail in July; air-flow checks save mid-summer outages.
Book the right month for the right build.
Arizona project timing matters more than most homeowners realize. Excavation lead times, plaster cure windows, monsoon prep, and HOA approvals all push optimal start dates 2–9 months ahead. Here's what to lock in this month for smooth delivery.
- Monsoon-resilient drainage upgrades.
- Permanent holiday lighting installs (book now for October install).
- Pool covers and auto-fill systems before peak evap.