When to Plant Thyme in Arizona

Growing Thyme in Arizona: Complete Guide

Thyme (Thymus vulgaris) is a warm-season crop that needs a head start indoors before Arizona's last frost. Most Arizona gardeners begin seeds indoors around Sunday, November 30, 2025 and move transplants outside around Sunday, February 8, 2026, after the risk of frost has passed.

Because Arizona stretches across 10 USDA hardiness zones (5b, 6a, 6b, 7a, 7b, 8a, 8b, 9a, 9b, 10a), planting windows can shift by as much as six to eight weeks from one end of the state to the other. Gardeners in the warmer southern zones can start earlier, while those in cooler northern zones should wait until the zone table above shows their last frost has passed.

With 90 days to maturity, Thyme needs the indoor head start that Arizona's growing season requires. Starting indoors ensures you have strong transplants ready the moment outdoor conditions are right.

Thyme requires full sun (6+ hours) and low (drought tolerant) moisture. In the arid Southwest, intense sun and low humidity mean irrigation is essential; mulch to prevent rapid soil moisture loss.

For the most precise planting dates tailored to your exact location, enter your ZIP code on our planting calendar or use the zone table above to find the schedule for your area of Arizona.