GrowZone

Seed-start answer

Start cucumbers seeds indoors around Mar 30

This uses ZIP 02108, the Boston frost station, and the Apr 20 last-frost estimate.

Seed starting schedule

Cucumbers dates for Boston, MA

StepDateHow to use it
Start IndoorsMarch 30, 2026Start seeds under lights or in a bright indoor seed-starting space.
Transplant OutdoorsApril 30, 2026Move hardened-off seedlings outside after the frost-risk window.
Direct SowApril 30, 2026Sow seed outside when the crop and soil can handle the window.