Lawn Care in Tucson, AZ
Your complete lawn care guide for Tucson — USDA Zone 9a, warm-season grass recommendations, and a soil-temperature-driven schedule.
Current Conditions
Soil Temp (4" depth)
81°F
→ Stable
Today's High
91°F
Today's Low
68°F
What to Do Now
Action
Apply Pre-Emergent Now
Soil temp has been at or above 55°F for 3 consecutive days — crabgrass seeds are starting to germinate. Apply pre-emergent immediately if not already done.
Info
Active Growth Period
Soil temp is 81°F — Bermuda Grass is in its peak growth range (65-85°F). Maintain regular mowing schedule.
Best Grass Types for Tucson
Bermuda Grass
WarmMowing Height: 0.5"–2"
Ideal Soil Temp: 65°F–85°F
St. Augustine Grass
WarmMowing Height: 3"–4"
Ideal Soil Temp: 65°F–85°F
Zoysia Grass
WarmMowing Height: 1"–2.5"
Ideal Soil Temp: 65°F–85°F
Bahia Grass
WarmMowing Height: 3"–4"
Ideal Soil Temp: 65°F–85°F
Centipede Grass
WarmMowing Height: 1.5"–2.5"
Ideal Soil Temp: 65°F–85°F
Tucson Lawn Care Calendar
Round 1 — Early Spring Pre-Emergent
Soil temp reaches 55°F- Pre-Emergent Herbicide — Apply pre-emergent herbicide before soil reaches 55°F to prevent summer annual weeds.
Round 2 — Spring Green-Up
Soil temp reaches 65°F- Low-N / High-K Stress Fertilizer — Apply a low-nitrogen, high-potassium fertilizer as warm-season turf exits dormancy.
- Pre-Emergent (2nd Application) — Second split-app of pre-emergent for extended weed prevention.
- Bio-Stimulant(optional) — Bio-stimulant to jumpstart soil biology as soil temps rise.
Round 3 — Early Summer
28-42 days after previous round- High-Nitrogen Fertilizer — Apply high-nitrogen fertilizer during peak warm-season growth.
- Grub Preventative — Apply preventative grub control (e.g. GrubEx / chlorantraniliprole) before grubs hatch. Critical for warm-season lawns where grubs can cause severe damage.
- Post-Emergent Broadleaf Herbicide(optional) — Spot-treat or blanket-spray broadleaf weeds while they are actively growing. Use warm-season safe formulations (avoid 2,4-D on St. Augustine).
- Bio-Stimulant(optional) — Bio-stimulant for root depth and nutrient uptake.
- Moisture Manager(optional) — Optional wetting agent to improve water distribution during heat.
Round 4 — Mid Summer
28-42 days after previous round- High-Nitrogen Fertilizer — Continue high-nitrogen feeding during warm-season peak growth.
- Surface Insect Control(optional) — Apply a surface insecticide (e.g. bifenthrin) to control armyworms, chinch bugs, sod webworms, and other surface-feeding pests.
- Bio-Stimulant(optional) — Bio-stimulant for sustained soil health.
Round 5 — Late Summer
28-42 days after previous round- High-Nitrogen Fertilizer — Final high-nitrogen application before growth slows in fall.
- Surface Insect Control(optional) — Monitor for late-season armyworm and chinch bug activity. Apply surface insecticide if damage is present.
- Bio-Stimulant(optional) — Bio-stimulant to prepare turf for seasonal transition.
Round 6 — Fall Transition
Soil temp drops to 70°F- Low-N / High-K Stress Fertilizer — Switch to low-nitrogen, high-potassium to harden turf for winter dormancy.
- Pre-Emergent (Fall) — Fall pre-emergent to prevent cool-season annual weeds (poa annua).
- Post-Emergent Broadleaf Herbicide(optional) — Fall is an effective time for broadleaf weed control in warm-season lawns. Target weeds as they prepare for winter.
- Bio-Stimulant(optional) — Bio-stimulant to support root carbohydrate storage.
Round 7 — Late Fall / Dormancy
Soil temp drops to 55°F- Bio-Stimulant(optional) — Light bio-stimulant application to maintain soil biology through winter dormancy. No nitrogen fertilizer needed.
Frequently Asked Questions
When should I fertilize my lawn in Tucson, AZ?
In Tucson (USDA Zone 9a), start fertilizing when soil temperatures consistently reach 65°F in spring, typically April-May. Apply high-nitrogen fertilizer every 4-6 weeks through the growing season.
What is the best grass for Tucson, AZ?
Tucson is in USDA Zone 9a, a warm-season zone. The best grass types include Bermuda Grass for full sun, Zoysia for moderate shade tolerance, and St. Augustine for shaded areas.
What USDA zone is Tucson, AZ?
Tucson is in USDA Hardiness Zone 9a. This means the average annual minimum winter temperature ranges from 20°F to 25°F. This zone classification helps determine which grass types and planting schedules work best for your lawn.
When should I apply pre-emergent in Tucson?
In Tucson, apply pre-emergent herbicide when soil temperatures at 4" depth reach 55°F and are rising. A split application works best: half rate at 55°F, then the second half about 2–3 weeks later when soil reaches 65°F. This extends crabgrass prevention through early summer. Check the current soil temperature at the top of this page for real-time guidance.
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