Last frost date in Harper Woods, Michigan

April 29

Average last frost in spring. In an early year (1 in 10) it's over by April 15; in a late year (1 in 10) it comes after May 13.

October 22

Average first frost in fall. 1 year in 10 it comes by October 7.

Source: NOAA U.S. Climate Normals 1991–2020, station Grosse Pointe Farms (USC00203477), 3 miles from Harper Woods, elevation 613 ft. NOAA National Centers for Environmental Information. These are long-term averages, not a forecast.

What to plant now

Frost dates for Harper Woods, Michigan
Early yearAverageLate year
Last frost in springApr 15Apr 29May 13
First frost in fallOct 7Oct 22Nov 3

An early or late year is one in 10: 1 year in 10 the frost comes before the early date, and 1 year in 10 after the late date.

Frost-free days in an average year: 176

Planting calendar for Harper Woods

Fall planting

USDA dates for places whose average first freeze is about October 20 (Harper Woods: October 22).

USDA lists chervil and chives, garlic, horseradish, leeks, onion plants, onion seed, onion sets, parsnips, garden peas, shallots as generally spring-planted here.

Spring planting

USDA dates for places whose average last freeze is about April 30 (Harper Woods: April 29).

USDA lists chinese cabbage as generally fall-planted here.

Planting dates: USDA Home and Garden Bulletin No. 9 (1967), “Suburban and Farm Vegetable Gardens,” tables 4 and 5 (earliest safe spring and latest safe fall dates), applied to this place's NOAA frost dates. “Plants” means setting out transplants, not sowing seed. How we match the table.

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