Gardening in Ohio

Everything we have worked out for Ohio: what to plant and when, which varieties finish in time, the pests that actually turn up here, and the jobs that pay off month by month. We also cover the rest of the property, from lawns and soil to home care and energy, because a garden rarely stops at the vegetable bed.

The numbers first, because everything else follows from them. Measured at the weather station in Columbus, the last spring freeze runs May 5 to May 15 and the first fall freeze runs October 5 to October 15, USDA zones 5b-6b, 3,783 growing degree days in the year.

Garlic does well: 21.8 weeks below 40 °F, comfortably past the six it needs to form a proper head.

Elsewhere on the property in Ohio: lawn care, soil and amendments, watering, flowers and borders and the pests that turn up here.

Figures from NOAA's 1991-2020 climate normals. A state is not one climate: elevation, a large lake or the coast can move these dates by two weeks either way, so check your own county with the extension service before you spend money.

What Eats Parsnip in Ohio, and When

A freshly harvested white parsnip lies in dark garden soil with green foliage visible, mountains in the blurred background.

Ohio State University Extension (Ohioline) documents nine garden pests for this territory, but only a handful of them have any business on a parsnip bed.

When to Overseed a Lawn in Ohio

Weeds sprouting along a concrete edge in a lawn area during warm season.

The safe window to overseed a cool-season lawn in Ohio runs from mid-August through mid-September, timed so new grass gets roughly 45 days of active…

First and Last Frost Dates in Ohio

First and Last Frost Dates in Ohio

Ohio’s spring and fall frost dates near Columbus, what the USDA hardiness zones mean for your yard, and how to turn both into an actual planting date.