What can I plant in March in Seattle?

In Seattle, ZIP 98101, GrowZone filters each supported crop by its ZIP-specific start-indoors, transplant, and direct-sow windows for March.

Should I use a ZIP planting calendar or a zone calendar?

Use the ZIP calendar for crop timing because it includes the Seattle frost station and USDA zone 9a; zone-only pages are broad planning references.

Month planting calendar

What to plant in March in Seattle (98101)

In Seattle, ZIP 98101, zone 9a, here is what you can start indoors, transplant, or direct-sow in March, and what to wait on until later.

Source: seattle-tacoma frost station, USDA zone 9a, last updated 2026-06-28. Verify locally before planting high-value crops because microclimates, current weather, and yard exposure can move the safe date.

Start indoors

No supported crops start indoors in March for ZIP 98101.

Transplant

Tomatoes Mar 27
Basil Mar 30
Lettuce Mar 6
Cucumbers Mar 30
Zucchini Mar 30
Kale Mar 6

Direct-sow

Basil Mar 30
Lettuce Mar 6
Cucumbers Mar 30
Zucchini Mar 30
Cilantro Mar 6
Bush beans Mar 27

What to plant in March in Seattle (98101)

Start indoors

Transplant

Direct-sow

Get March reminders for your ZIP