Lawn Care Schedule for Tempe, Arizona
Zone 9b is frost-free in most years, with warm-season grasses active nearly 12 months. Lawn care revolves around summer heat management, consistent irrigation, and year-round weed pressure rather than cold hardiness or dormancy timing.
Arizona's dual-season lawn approach is well established: Bermuda dominates in summer while cool-season ryegrass is overseeded each fall to maintain winter color during Bermuda's dormancy.
Zone 9b Timing Guide
- Pre-emergent window:
- January
- Active growing season:
- Year-round active
Local Pests & Diseases
Bermuda lawns face relatively few pest pressures in Arizona's arid climate, though white grubs occasionally appear in irrigated turf.
Recommended Grass Types for Tempe
Month-by-Month Treatment Calendar
Overseeded ryegrass provides winter color; Bermuda fully dormant beneath it
Continue moderate irrigation for overseeded ryegrass
Feed overseeded ryegrass as it carries the lawn through late winter
Continue ryegrass feeding as Bermuda begins to stir beneath it
Transition feeding begins as Bermuda reawakens and ryegrass starts to thin naturally
Peak summer irrigation demand — desert evaporation rates are extreme
Lower pressure than humid climates but still worth monitoring
Continue Bermuda feeding through peak heat
Maintain consistent deep irrigation
Final Bermuda feeding before preparing for fall overseeding
Overseed with perennial ryegrass for winter color as Bermuda begins to slow
Establish irrigation routine for newly overseeded ryegrass as Bermuda goes dormant
Reduced watering as ryegrass matures into its winter routine
Related Guides
Treatment Guides for the Transition Belt
Fertilization
Feed your lawn at the right time — not on the bag's schedule.
Overseeding
Thicken thin turf and fill bare spots during the optimal seeding window.
Aeration
Break up compaction and open the soil to water, air, and nutrients.
Watering
Water deep and infrequent — not shallow and daily.
Grub Control
Prevent root damage before you see it — curative treatments are less effective.
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