When does pre-emergent application typically open in Phoenix, AZ?

Pre-emergent application typically opens in April to May for Phoenix, AZ, when 2-inch soil temperature reaches the 50–55°F threshold for several consecutive days. Apply earlier than that and the herbicide degrades before crabgrass germinates; apply later and weeds have already sprouted. This is informational guidance only, not a prescription. The label is the law. Consult your local Cooperative Extension office before applying any product.

What grass types grow best in Phoenix, AZ?

Phoenix, AZ is primarily a warm-season climate. Warm-season grasses (Bermuda, Zoysia, St. Augustine, Centipede, Bahia) thrive once 2-inch soil sits in the 65–90°F range and go dormant brown over winter. Picking a grass family that matches the climate is the single biggest lawn-care decision; transition-zone homeowners often maintain blends and accept that neither family will look perfect year-round. This is informational guidance only, not a prescription. The label is the law. Consult your local Cooperative Extension office before applying any product.

When is the first fall frost typically expected in Phoenix, AZ?

Phoenix, AZ sees little to no typical fall frost in most years. Cool-season tasks anchored to a frost date use a calendar-fallback window instead. This is informational guidance only, not a prescription. The label is the law. Consult your local Cooperative Extension office before applying any product.

How often is this schedule updated?

Recommendations recompute every 6 hours from the latest reading at Tucson 11 W, about 99 miles from Phoenix. This is informational guidance only, not a prescription. The label is the law. Consult your local Cooperative Extension office before applying any product.

What soil temperature do warm-season grasses need to germinate?

Seeded warm-season grasses like Bermuda and Zoysia germinate best when 2-inch soil temperature sits in the 65–90°F range for several consecutive days; below that range, seed sits dormant or rots. St. Augustine establishes from sod or plugs rather than seed, but takes hold in the same warm-soil window. The re-entry interval (REI) on any post-emergent products you apply during establishment is on the product label; respect it before letting pets or children back on treated areas. This is informational guidance only, not a prescription. The label is the law. Consult your local Cooperative Extension office before applying any product.

Where does the soil temperature data for Phoenix come from?

Soil temperature for Phoenix comes from Tucson 11 W, a station in the NOAA US Climate Reference Network (USCRN) located about 99 miles away. Daily readings at depths from 2 inches down to 40 inches feed the schedule's window-open and window-closing decisions. This is informational guidance only, not a prescription. The label is the law. Consult your local Cooperative Extension office before applying any product.

Lawn Care Schedule for Phoenix, AZ

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Right now in Phoenix

76°F at 2-inch depth · Measured in the ground · Tucson 11 W (NOAA USCRN #53131), 99 mi SE · read 2 days ago (Oct 26, 2026) · updates nightly with about a 1-day sensor lag

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Lawn Care Schedule for Phoenix, AZ

Right now in Phoenix

Lawn Care Schedule for Phoenix, AZ

Right now in Phoenix

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