GrowZone

Seed-start answer

Start peppers seeds indoors around Mar 15

In ZIP 53202, start peppers seeds indoors around Mar 15, about 56 days before the May 10 last-frost estimate.

Source: milwaukee-mitchell frost station, USDA zone 6a, last updated 2026-06-28. Verify locally before planting high-value crops because microclimates, current weather, and yard exposure can move the safe date.

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.