What to plant in March, zone 4a
In zone 4a, the typical last spring frost is May 12 and the first fall frost is September 28. Here is your March checklist.
Start indoors
Start these indoors this month:
- BasilMarch 17 to March 31
- BroccoliMarch 3 to March 17
- CabbageMarch 3 to March 17
- CauliflowerMarch 10 to March 24
- CollardsMarch 17
- EggplantMarch 17
- KaleFebruary 24 to March 10
- LettuceMarch 31 to April 7
- MarigoldMarch 31 to April 14
- ParsleyMarch 17 to March 31
- PepperMarch 17
- PetuniaMarch 3 to March 17
- RhubarbMarch 31
- SpinachMarch 31 to April 7
- Swiss ChardMarch 31 to April 7
- TomatoMarch 31 to April 7
Want your exact dates?
These are zone 4a averages. Enter your ZIP for a calendar built on your nearest weather station.
Open the planting calendarUSDA Plant Hardiness Zone Map, 2023. USDA Agricultural Research Service / Oregon State University PRISM Group. NOAA National Centers for Environmental Information, U.S. Climate Normals 1991-2020. Zone dates are medians; local conditions vary.