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Starting Seed Indoors

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When is the last frost date where you live?

When is the last frost date where you live? Image by  Lilli2de

The web is buzzing about planting seeds. It certainly is the right time somewhere in the world to start seeds indoors, but not yet for us here in Michigan.

The information on the back of seed packets talks about 4,5,6, or more weeks before the last frost date to start seeds indoors. Most tomato plants can be started indoors 6 to 8 weeks before the last expected frost date. When is the last frost date in your garden?

Plantmaps.com has a great interactive map that makes it easier to understand our multi-zoned geography that includes Zones 3a to 6b.

Double-click on the map, or use the + icon to zoom in to see your exact location. Our last frost date in Michigan varies from April 21 to June 21—that’s 2 months! Look at these examples from plantmaps.com.

Alpena Last Frost: May 1 – May 10
Ann Arbor Last Frost: Apr. 21 – Apr. 30
Clinton Township Last Frost: Apr. 21 – Apr. 30
Dearborn Last Frost: Apr. 21 – Apr. 30
Detroit Last Frost: Apr. 21 – Apr. 30
Flint Last Frost: May 1 – May 10
Grand Rapids Last Frost: May 1 – May 10
Kalamazoo Last Frost: May 1 – May 10
Lansing Last Frost: May 11 – May 20
Livonia Last Frost: Apr. 21 – Apr. 30
Marquette Last Frost: May 11 – May 20
Sault Ste Marie Last Frost: May 21 – May 31
Southfield Last Frost: Apr. 21 – Apr. 30
Sterling Heights Last Frost: Apr. 21 – Apr. 30
Warren Last Frost: Apr. 21 – Apr. 30
Westland Last Frost: May 1 – May 10

6 weeks prior to the last frost date in Saginaw is (May 10 minus 6 weeks) March 29—plus or minus the actual outdoor conditions.
6 weeks prior to the last frost date in Sault Ste Marie is (May 21 minus 6 weeks) April 9—plus or minus the actual outdoor conditions.

We have a few months to wait. Let’s enjoy the winter and dream about spring.

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