When to plant Microgreens in Macomb County, MI
Macomb County gardeners should plant Microgreens between April 14 and May 5 in spring. With Macomb County's Zone 6b climate (last frost April 28), Microgreens needs 7–21 days to mature — plant by September 29 for a full harvest. A second sowing from August 11 to August 25 extends the harvest into fall.
When to Plant Microgreens in Macomb County, MI
Your June planting checklist for Macomb County, Michigan
June is a pivotal month for Macomb County, Michigan gardens. Focus on these tasks first and you'll set up the rest of the season for success.
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Start microgreens under lights
Bottom-water once the first true leaves appear — it keeps stems dry and knocks back damping-off.
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Pick microgreens
Morning harvests are best — cooler temperatures mean crisper produce and longer fridge life.
Microgreens are young seedlings of vegetables and herbs harvested at the cotyledon or first true leaf stage. They pack concentrated flavors and nutrients in a tiny package.
Macomb County, Michigan is in USDA Zone 6b. The average last spring frost is April 28 and the first fall frost is October 20, giving you a growing season of approximately 175 days.
At an elevation of 628 feet, Macomb County receives approximately 33.7 inches of rainfall annually with predominantly silt loam soil. Summer highs average 91°F, providing good warmth for Microgreens during the growing season.
Macomb County Soil Profile
Soil Type
Silt Loam
Soil pH
5.8-6.9
Drainage
Well Drained
Microgreens Planting Risk Windows
Percentages indicate frost risk at transplant. The 70% safe window means there is a 30% chance of frost after transplant — suitable for cold-hardy crops or gardeners with frost protection. The 90% safe window is best for tender plants.
Soil Compatibility in Macomb County
How your county's soil matches Microgreens's growing requirements.
Soil pH
Your soil pH (5.8–6.9) overlaps with Microgreens's range (6.0–7.0), though not a perfect match.
Soil Texture
The silt loam soil in Macomb County is excellent for Microgreens — good drainage, moisture retention, and nutrient holding capacity.
Organic Matter
Organic matter is excellent (4.4%) — Microgreens will thrive.
How to Plant Microgreens
Fall planting: Sow 10 weeks before your first frost date for a fall harvest.
Succession Planting Microgreens
Sow every 0.7 weeks. Last sowing by Sep 29 to harvest before frost.
For a dedicated fall crop, sow by Aug 11.
Microgreens Water Budget
Monthly Watering Guide for Microgreens
Microgreens needs approximately 1 inches of water per week (4.3" per month). Here's how your county's rainfall compares month by month.
| Month | Microgreens Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 1.3" | 0" | ❄️ Dormant |
| Feb | — | 1.5" | 0" | ❄️ Dormant |
| Mar | — | 2.2" | 0" | ❄️ Dormant |
| Apr | 4.3" | 3.8" | 0.5" | 💧 Light watering |
| May | 4.3" | 3.7" | 0.6" | 💧 Light watering |
| Jun | 4.3" | 4.1" | 0.2" | 💧 Light watering |
| Jul | 4.3" | 4" | 0.3" | 💧 Light watering |
| Aug | 4.3" | 3.5" | 0.8" | 💧 Light watering |
| Sep | 4.3" | 2.7" | 1.6" | 💧 Light watering |
| Oct | 4.3" | 2.6" | 1.7" | 💧 Light watering |
| Nov | — | 2.3" | 0" | ❄️ Dormant |
| Dec | — | 2" | 0" | ❄️ Dormant |
Water needs are for active growing months only (Apr–Oct in Macomb County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Microgreens Heat Requirements (GDD)
What are Growing Degree Days (GDD)?
Growing Degree Days measure the total warmth your plants receive during the growing season. Think of it as a "heat bank" — every day above 50°F deposits warmth that helps your plants grow.
Each plant needs a certain amount of accumulated heat to mature. If your county provides more GDD than the plant needs, it's a great fit. If it's close, you may want to choose faster-maturing varieties or start seeds indoors to get a head start.
Microgreens Planting Timeline — Macomb County, MI
Microgreens Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | March 24 | Mar 24 – Apr 7 |
| Transplant Outdoors | April 28 | Apr 28 – May 12 |
| Direct Sow | April 14 | Apr 14 – May 5 |
| Harvest | May 5 | May 5 – Jun 2 |
| Fall Sowing | August 11 | Aug 11 – Aug 25 |
Plant 0.5" deep · 2" apart · Rows 6" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | Start Indoors |
| April | Start Indoors Transplant Outdoors Direct Sow |
| May | Transplant Outdoors Direct Sow Harvest |
| June | Harvest |
| July | — |
| August | Fall Sowing |
| September | — |
| October | — |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Partial Shade (3-6 hours)
💧 Water
1"/week · Only during dry spells
📅 Days to Maturity
7–21 days
🧪 Soil pH
Needs 6–7 · Your soil: acceptable
🗺️ USDA Zone
Zone 6b
📆 Growing Season
175 days in Macomb County
Growing Tips for Microgreens in Macomb County
Direct sow Microgreens outdoors after April 28 in Macomb County when soil has warmed and frost danger has passed.
Your generous 175.0-day season in Macomb County allows multiple plantings of Microgreens. Sow every 3.0 days for continuous harvest.
General growing tips
Sow seeds densely on shallow trays of moist growing medium. Cover until germination, then provide light. Harvest with scissors when 1-3 inches tall. Grow year-round indoors.
Microgreens in Other Locations
Frequently Asked Questions
When should I plant Microgreens in Macomb County, MI?
Macomb County is in Zone 6b with an average last frost of April 28. Plan your Microgreens planting based on this frost date — see the calendar above for exact timing.
What planting zone is Macomb County, MI?
Macomb County, Michigan is in USDA Hardiness Zone 6b. The average last spring frost is April 28 and first fall frost is October 20.
When should I plant Microgreens in Macomb County, MI?
In Macomb County, MI, plant Microgreens after the last frost (around April 28) and before the first frost (around October 20). Best results when soil holds above 50°F.
What growing zone is Macomb County, MI for Microgreens?
Macomb County sits in USDA Zone 6b. Microgreens grows reliably in zones 1a through 13b, so it's a good fit here.
Can Microgreens grow in Macomb County's climate?
Yes — Microgreens grows well in Macomb County's temperate climate. Macomb County averages a 175-day frost-free season, with last frost around April 28 and first frost around October 20.
Your Macomb County Garden Planner — Free
A 22-page printable planner built for Macomb County (Zone 6b). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.