Farmington, MI

Farmington sits in zone 6b, where winter lows reach -5 to 0 degrees Fahrenheit. The growing season runs 172 days from the last spring frost (April 29) to the first fall frost (October 20). This is typical northern Michigan climate: cold enough to eliminate tender perennials, warm enough for temperate tree fruits, but short enough that heat-demanding crops require planning.

Stone fruits thrive here. Sour cherries, sweet cherries, plums (both European and Japanese), and peaches grow reliably, though the late April frost date poses a constant risk to early bloomers. Apples and pears anchor the orchard landscape and tolerate the cold winters without strain. American persimmons, though not indigenous to Michigan, succeed in zone 6b and are gaining interest as a low-maintenance, drought-hardy alternative to more finicky fruits.

The 172-day growing season is the governing constraint for warm-season crops. Tomatoes, peppers, and eggplants must be started indoors by early April (6 to 8 weeks before the last frost) to mature before October 20. Direct-seeded squash and beans need planting by late May to finish before the fall frost arrives.

Humidity from nearby water bodies increases disease pressure on deciduous fruits, particularly apple scab and fire blight on pears. Fungal issues are managed through variety selection and dormant-season pruning rather than heavy spray schedules. Late-spring frosts remain the wild card, occasionally destroying the year's fruit crop in a single night.

The late April frost date (April 29) is Farmington's defining constraint. Peaches and early-blooming plum varieties often set flowers by mid-April, only to see buds killed by a hard frost. This is not a rare event; frost in late April happens roughly one year in three.

Fire blight pressure rises in humid springs, particularly affecting pears. Susceptible varieties like Bartlett often require pruning out infected branches. Apple scab thrives in moisture and demands resistant varieties or preventive fungicide programs.

The short growing season (172 days) punishes late tomato transplants and heat-dependent crops. A September cold snap arriving even a week early can catch gardens with green fruit still on the vine. Winter damage to marginally hardy shrubs and perennials is also common; plants rated for zone 6b survive most years but not the occasional -15 degree night.

Delay spring planting until mid-May, not April 29. Even though the statistical last frost is April 29, a practical window of safety doesn't arrive until 2 to 3 weeks later. Tomatoes, peppers, and squash planted before mid-May often outperform earlier plantings simply because they escape the true lingering cold snaps.

Select peach and plum varieties rated for zone 5 or 5b, not just 6b. Cold-hardy varieties like Reliance peach and Shiro plum tolerate the occasional -15 degree winter and bloom slightly later, reducing frost damage risk. Standard zone 6b varieties often sustain damage in the worst winters.

Plan succession crops in the vegetable garden by early August. Cool-season greens, root crops, and brassicas planted by August 1 mature before October 20. Later sowings often fail to size before frost.