This page records what Tucson Water and University of Arizona Cooperative Extension publish about
lawns in the Tucson area: the water situation, which grass is best adapted to the heat, how a lawn
is kept green through winter, and how much water winter turf needs. Each figure is attributed to
the publication it comes from, with the date it was read.
The water situation
Tucson Water is in Tier 2 of its Drought Preparedness and Response Plan — the tier declared when Lake Mead falls below 1,045 feet — and year-round
water-waste rules apply. Landscape decisions here are made against a standing constraint rather
than a seasonal one.
Source: Tucson Water (City of Tucson) — tucsonaz.gov Drought Preparedness. Read 2026-08-03.
Which grass is best adapted
University of Arizona Cooperative Extension names the low desert of Arizona, which it states
includes Tucson, as an area where bermudagrass is the best adapted turfgrass for the heat and its
water requirements.
Source: UA Cooperative Extension az1817 (Umeda, April 2020) —
extension.arizona.edu az1817. Read 2026-07-30.
Overseeding for winter color
Bermudagrass goes dormant in winter. A cool-season grass is seeded into it beforehand to hold
color through the cool months.
| Factor | Published value |
|---|---|
| Ideal timing | October |
| Daytime air temperature at overseeding | 80-85 F |
| Nighttime air temperature at overseeding | about 55 F |
| Most common winter grass | Perennial ryegrass |
| Period it stays green | October through May |
| Seed rate | 12 to 15 pounds per 1,000 square feet |
Source: UA Cooperative Extension az1683 (Kopec & Umeda, October 2015) —
extension.arizona.edu az1683. Read 2026-07-30.
How much water winter turf needs
Between November and May, a range of one-half to one and one-half inches per week of water may
be needed by the winter turf. That range is stated for winter turf generally. Monthly figures
published alongside it are derived from weather-station data for a different Arizona city and are
not reproduced here.
Source: UA Cooperative Extension az1817 (Umeda, April 2020) —
extension.arizona.edu az1817. Read 2026-07-30.
Frequently asked questions
Which grass suits the Tucson climate best?
Bermudagrass. UA Cooperative Extension az1817 names it the best adapted turfgrass for the heat
and its water requirements in the low desert area that includes Tucson.
When should a lawn be overseeded?
October, when daytime air temperatures are 80-85 F and nighttimes are about 55 F (az1683).
How much ryegrass seed is needed?
12 to 15 pounds per 1,000 square feet (az1683).
How long does overseeded ryegrass stay green?
October through May (az1683).
How much water does winter turf need?
One-half to one and one-half inches per week between November and May (az1817).
Sources
- Tucson Water (City of Tucson) — www.tucsonaz.gov/Departments/Water/Conservation/Landscape- (read 2026-07-26)
- University of Arizona Cooperative Extension az1683 (Kopec & Umeda, October 2015), Overseeding Winter Grasses into Bermudagrass Turf — extension.arizona.edu/publication/overseeding-winter-grass (read 2026-07-30)
- University of Arizona Cooperative Extension az1817 (Umeda, April 2020), A Turfgrass Maintenance Guide for Residential and Commercial Lawns in the Low Elevation Arizona Desert — extension.arizona.edu/publication/turfgrass-maintenance-gu (read 2026-07-30)
In Tucson, the useful starting point is the property itself: Sonoran Desert heat, arid winters and summer monsoon runoff and caliche layers and rocky, alkaline desert soil shape what can be planted and how water moves. Use the address to check Tucson Water conservation guidance and Pima County rules; a plan that respects caliche layers and rocky, alkaline desert soil and the area’s established vegetation—buffalograss, palo verde, mesquite and agave—is easier to evaluate.
Question 1 for watering decisions is how guide will be verified on this property. Leave the answer open until the applicable measurement, inspection, or owner selection is recorded in the scope.