Question 1

When should I plant tomatoes in ZIP 85701?

Accepted Answer

In ZIP 85701, the main tomatoes target is around Feb 22, based on the representative Tucson frost station and USDA zone 9b.

Question 2

When should I start tomatoes seeds indoors in 85701?

Accepted Answer

Start tomatoes seeds indoors in ZIP 85701 around Jan 4, about 42 days before the Feb 15 last-frost estimate.

Question 3

When is the last frost in Tucson?

Accepted Answer

Tucson (ZIP 85701) has an average last spring frost around Feb 15, based on the representative Tucson frost station.

Question 4

When is the first frost in Tucson?

Accepted Answer

Tucson (ZIP 85701) has an average first fall frost around Dec 5, leaving about 293 frost-free days.

Question 5

Is this a guaranteed planting date?

Accepted Answer

No. GrowZone uses frost-date estimates, hardiness zones, and crop timing rules for planning. Local microclimates and current weather can shift the right date.

Step	Date	How to use it
Start Indoors	January 4, 2026	Start seeds under lights or in a bright indoor seed-starting space.
Transplant Outdoors	February 22, 2026	Move hardened-off seedlings outside after the frost-risk window.

Start tomatoes seeds indoors around Jan 4

Tomatoes dates for Tucson, AZ