GrowZone

Seed-start answer

Start peppers seeds indoors around Mar 15

This uses ZIP 53202, the Milwaukee frost station, and the May 10 last-frost estimate.

Seed starting schedule

Peppers dates for Milwaukee, WI

StepDateHow to use it
Start IndoorsMarch 15, 2026Start seeds under lights or in a bright indoor seed-starting space.
Transplant OutdoorsMay 24, 2026Move hardened-off seedlings outside after the frost-risk window.