Question 1

When should I plant kale in ZIP 98101?

Accepted Answer

In ZIP 98101, the main kale target is around Mar 6, based on the representative Seattle frost station and USDA zone 9a.

Question 2

When should I start kale seeds indoors in 98101?

Accepted Answer

Start kale seeds indoors in ZIP 98101 around Feb 13, about 35 days before the Mar 20 last-frost estimate.

Question 3

When is the last frost in Seattle?

Accepted Answer

Seattle (ZIP 98101) has an average last spring frost around Mar 20, based on the representative Seattle frost station.

Question 4

When is the first frost in Seattle?

Accepted Answer

Seattle (ZIP 98101) has an average first fall frost around Nov 20, leaving about 245 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 13, 2026	Start seeds under lights or in a bright indoor seed-starting space.
Transplant Outdoors	March 6, 2026	Move hardened-off seedlings outside after the frost-risk window.
Direct Sow	February 27, 2026	Sow seed outside when the crop and soil can handle the window.

Start kale seeds indoors around Feb 13

Kale dates for Seattle, WA