Question 1

When should I plant kale in ZIP 73102?

Accepted Answer

In ZIP 73102, the main kale target is around Mar 22, based on the representative Oklahoma City frost station and USDA zone 7b.

Question 2

When should I start kale seeds indoors in 73102?

Accepted Answer

Start kale seeds indoors in ZIP 73102 around Mar 1, about 35 days before the Apr 5 last-frost estimate.

Question 3

When is the last frost in Oklahoma City?

Accepted Answer

Oklahoma City (ZIP 73102) has an average last spring frost around Apr 5, based on the representative Oklahoma City frost station.

Question 4

When is the first frost in Oklahoma City?

Accepted Answer

Oklahoma City (ZIP 73102) 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	March 1, 2026	Start seeds under lights or in a bright indoor seed-starting space.
Transplant Outdoors	March 22, 2026	Move hardened-off seedlings outside after the frost-risk window.
Direct Sow	March 15, 2026	Sow seed outside when the crop and soil can handle the window.

Start kale seeds indoors around Mar 1

Kale dates for Oklahoma City, OK