Gardening in Maine

Everything we have worked out for Maine: 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 Portland, the last spring freeze runs April 22 to May 1 and the first fall freeze runs October 9 to October 21, USDA zones 3b-6a, 2,408 growing degree days in the year.

That is enough for early varieties, tight for anything late. Garlic does well: 30.4 weeks below 40 °F, comfortably past the six it needs to form a proper head.

Elsewhere on the property in Maine: 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.

Watering Pots and Containers in Maine

Watering Pots and Containers in Maine

Maine gardeners get an answer most of the country would envy: about 11.2 inches of rain falls across June, July and August, and only 3.8 days a year hit…

When to Plant Onions in Maine

When to Plant Onions in Maine

Maine onions go in the ground in early spring, not fall. At 43.65 degrees north (Portland), winters are long enough and cold enough that overwintered…

The Best Onion Varieties for Maine

The Best Onion Varieties for Maine

Maine sits at 43.65 degrees north latitude, measured at Portland, and the state gets 15 hours and 15 minutes of daylight on the longest day of the year.

The Best Grass Seed for Maine Lawns

The Best Grass Seed for Maine Lawns

Cool-season grasses like tall fescue, Kentucky bluegrass and fine fescue suit Maine’s climate, with fall seeding timed to the region’s frost dates.

The Best Apple Varieties for Maine

The Best Apple Varieties for Maine

Explains which apple varieties survive Maine’s cold winters and short frost-free season, based on NOAA climate data and each variety’s known bloom timing and hardiness.