Free tool

Planting calendar

Enter your last spring frost date (or pick a zone) for seed-starting and planting windows as a timeline.

Your frost date

Everything is counted from your average last spring frost.

or

Windows are adapted from University of Minnesota Extension timing. Zone dates are rough averages; for better results use your local average last frost date (NOAA climate normals or your county extension office).

Enter your last frost date

Or pick a USDA zone for a rough estimate. Your calendar grows here as a timeline you can print.

Sources

Pairings are summarized in our own words from extension-service guidance. Research support for many companion effects is limited, so treat them as good habits, not guarantees.