GrowZone

Seed-start answer

Cilantro is usually direct-sown around Apr 6

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

Seed starting schedule

Cilantro dates for Boston, MA

StepDateHow to use it
Direct SowApril 6, 2026Sow seed outside when the crop and soil can handle the window.