When to Plant in Michigan

Michigan's two peninsulas create diverse growing conditions. The Lower Peninsula's fruit belt along Lake Michigan has surprisingly mild conditions, while the Upper Peninsula has a much shorter growing season.

The Great Lakes moderate temperatures near the coasts but can bring unpredictable late-spring weather. Inland areas tend to have more extreme temperature swings than lakeside locations.

Common Mistakes

Planting before Memorial Day in most of Michigan — late frosts are common through mid-May.
Not taking advantage of the Lake Michigan fruit belt's extended season near the coast.
Ignoring soil temperature — cold soil slows germination even after air temperatures warm up.
Not using row covers or cold frames — they can add 3-4 weeks to Michigan's growing season.

FAQ

What is the last frost date?

The last frost date is the typical date in spring when your area has its final frost. After this date, it's generally safe to plant warm-season crops outdoors.

When should I start tomatoes indoors in Michigan?

Start tomato seeds indoors about 6–8 weeks before your last frost date. For most of Michigan, that means mid to late March.

Can I plant before the last frost?

Yes — cool-season crops like lettuce, peas, spinach, and broccoli can handle light frost and should be planted 4–6 weeks before your last frost date.

Why does timing vary so much within Michigan?

The Great Lakes create a moderating effect on nearby areas. The western fruit belt stays milder, while inland areas and the Upper Peninsula have shorter seasons and later frost dates.

What if I live in a frost-free area?

Michigan doesn't have frost-free areas, but the Lake Michigan shoreline has notably milder conditions. Enter your zip code in the app for your exact frost dates.

How does Plan My Garden create my schedule?

You enter your zip code, and we look up your local frost dates. Then based on the crops you pick, we calculate when to start seeds, transplant, and harvest — personalized to your location.