Question 1

When should I plant tomatoes in ZIP 74103?

Accepted Answer

In ZIP 74103, the main tomatoes target is around Apr 12, based on the representative Tulsa frost station and USDA zone 7b.

Question 2

When should I start tomatoes seeds indoors in 74103?

Accepted Answer

Start tomatoes seeds indoors in ZIP 74103 around Feb 22, about 42 days before the Apr 5 last-frost estimate.

Question 3

When is the last frost in Tulsa?

Accepted Answer

Tulsa (ZIP 74103) has an average last spring frost around Apr 5, based on the representative Tulsa frost station.

Question 4

When is the first frost in Tulsa?

Accepted Answer

Tulsa (ZIP 74103) has an average first fall frost around Oct 30, leaving about 208 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	February 22, 2026	Start seeds under lights or in a bright indoor seed-starting space.
Transplant Outdoors	April 12, 2026	Move hardened-off seedlings outside after the frost-risk window.

Start tomatoes seeds indoors around Feb 22

Tomatoes dates for Tulsa, OK