What to plant in March, zone 4b
In zone 4b, the typical last spring frost is May 8 and the first fall frost is October 1. Here is your March checklist.
Start indoors
Start these indoors this month:
- BasilMarch 13 to March 27
- BroccoliFebruary 27 to March 13
- CabbageFebruary 27 to March 13
- CauliflowerMarch 6 to March 20
- CollardsMarch 13
- EggplantMarch 13
- KaleFebruary 20 to March 6
- LettuceMarch 27 to April 3
- MarigoldMarch 27 to April 10
- ParsleyMarch 13 to March 27
- PepperMarch 13
- PetuniaFebruary 27 to March 13
- RhubarbMarch 27
- SpinachMarch 27 to April 3
- Swiss ChardMarch 27 to April 3
- TomatoMarch 27 to April 3
Want your exact dates?
These are zone 4b 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.