What to plant in March, zone 3a
In zone 3a, the typical last spring frost is May 29 and the first fall frost is September 5. Here is your March checklist.
Start indoors
Start these indoors this month:
- BroccoliMarch 20 to April 3
- CabbageMarch 20 to April 3
- CauliflowerMarch 27 to April 10
- KaleMarch 13 to March 27
- PetuniaMarch 20 to April 3
Want your exact dates?
These are zone 3a 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.