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Ottawa County, MI — Planting Guide

Ottawa County is in USDA Zone 6a. The average last spring frost is May 9 and the first fall frost is October 9, giving you a growing season of approximately 153 days.

At an elevation of 1,027 ft, Ottawa County receives approximately 41.9 in of rainfall annually. Summer highs average 84°F with winter lows around 19°F. The predominant soil type is Silt Loam.

🌡️ Zone

6a (-10°F to -5°F min)

❄️ Last Frost

May 9

🍂 First Frost

October 9

📅 Growing Season

153 days

⛰️ Elevation

1,027 ft

🌧️ Annual Rainfall

41.9 in

Ottawa County, MI Moderate season
153 days
❄
Last Spring Frost May 9
➔ 153 growing days ➔
❄
First Fall Frost October 9

Ottawa County Soil Profile

Soil Type

Silt Loam

Soil pH

6.0-7.0

Drainage

Well Drained

Zone 6a Frost Countdown
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Last Frost: May 9 First Frost: Oct 9

Soil & Growing Conditions in Ottawa County

Soil Type

Silt Loam

Ideal for most crops — holds moisture and nutrients while draining well.

Watering Needs

Moderate rainfall (41.9 in.) — plan to water 1–2 times per week during the growing season.

Season Tips

153-day frost-free season

Start warm-season crops indoors and focus on short-season varieties. Cold frames extend your season by 3–4 weeks in fall.

Your Free Printable Garden Planner

Plan every bed, every planting, every harvest — in one place. This 22-page printable includes your zone's planting calendar, a month-by-month task list, a seed inventory tracker, a harvest log, and succession-planting charts. Built to print, write in, and actually use all season.

Instant PDF download. No spam, unsubscribe any time.

Recommended for Your Garden

🧪
Soil Test Kit $12-25

Test your soil pH, nitrogen, phosphorus, and potassium levels before planting.

Know your soil before you plant for best results.

📏
Digital pH Meter $10-20

Get instant, accurate soil pH readings to fine-tune your amendments.

Helpful for your garden setup.

🍂
Organic Compost $8-30

Boost soil fertility and structure with rich, well-aged organic compost.

Helpful for your garden setup.

🥬 Vegetables to Grow in Ottawa County

107 vegetables that grow well in Zone 6a with planting dates for Ottawa County.

Show all 107 vegetables with planting dates
Plant Start Indoors Direct Sow Transplant Fall Plant Harvest Days to Maturity
Acorn Squash Apr 4 May 16 May 23 — Aug 15 – Sep 19 80–100
Amaranth Mar 14 May 16 May 23 — Aug 22 – Oct 10 90–120
Arugula Apr 4 Apr 25 May 9 Jul 31 Jun 13 – Aug 15 30–50
Asparagus — — May 23 — — 730–1095
Beets — Apr 25 — Jul 31 Jun 20 – Jul 18 50–70
Belgian Endive Apr 4 Apr 25 May 9 Jul 31 Aug 29 – Oct 24 110–150
Bitter Melon Mar 14 May 16 May 23 — Jul 25 – Sep 5 60–90
Black Beans — May 16 — — Aug 15 – Oct 3 90–120
Bok Choy Apr 4 Apr 25 May 9 Jul 31 Jun 20 – Jul 25 40–60
Broccoli Apr 4 Apr 25 May 9 Jul 31 Jul 11 – Aug 22 60–90
Broccoli Rabe Apr 4 Apr 25 May 9 Jul 31 Jun 20 – Jul 25 40–60
Brussels Sprouts Apr 4 Apr 25 May 9 Jul 31 Aug 8 – Oct 3 90–130
Butternut Squash Apr 4 May 16 May 23 — Aug 22 – Sep 26 85–110
Cabbage Apr 4 Apr 25 May 9 Jul 31 Jul 11 – Sep 5 60–100
Calabash Mar 14 May 16 May 23 — Aug 15 – Oct 10 80–120
Carrots — Apr 25 — Jul 31 Jun 27 – Aug 1 60–80
Cauliflower Apr 4 Apr 25 May 9 Jul 31 Jul 4 – Sep 5 55–100
Celeriac Apr 4 Apr 25 May 9 Jul 31 Aug 22 – Sep 26 100–120
Celery Apr 4 Apr 25 May 9 Jul 31 Aug 1 – Sep 26 80–120
Celtuce Apr 4 Apr 25 May 9 Jul 31 Jul 11 – Aug 22 60–90
Chard Apr 4 Apr 25 May 9 Jul 31 Jul 4 – Aug 22 50–60
Chickpeas Apr 4 Apr 25 May 9 Jul 31 Aug 1 – Sep 12 80–110
Chicory Apr 4 Apr 25 May 9 Jul 31 Jul 11 – Aug 22 60–85
Chinese Cabbage Apr 4 Apr 25 May 9 Jul 31 Jul 4 – Aug 1 50–70
Christmas Lima Beans Mar 14 May 16 May 23 — Aug 15 – Sep 19 80–100
Collard Greens Apr 4 Apr 25 May 9 Jul 31 Jul 4 – Sep 5 55–75
Corn — May 16 — — Jul 18 – Sep 12 60–100
Cowpeas — May 16 — — Jul 18 – Aug 29 60–90
Cress Apr 4 Apr 25 May 9 Jul 31 May 23 – Jun 13 14–21
Crookneck Squash Apr 4 May 16 May 23 — Jul 11 – Aug 8 45–60
Crosne — Apr 25 — Jul 31 Sep 26 – Nov 7 150–200
Cucumber Apr 4 May 16 May 23 — Jul 18 – Sep 12 50–70
Daikon — Apr 25 — Jul 31 Jun 20 – Jul 18 50–70
Delicata Squash Apr 4 May 16 May 23 — Aug 15 – Sep 19 80–100
Edamame — May 16 — — Aug 1 – Sep 12 75–100
Eggplant Feb 28 May 16 May 23 — Aug 1 – Oct 3 65–85
Endive Apr 4 Apr 25 May 9 Jul 31 Jun 27 – Aug 1 45–65
Escarole Apr 4 Apr 25 May 9 Jul 31 Jul 4 – Aug 1 50–70
Fava Beans Apr 4 Apr 25 May 9 Jul 31 Jul 25 – Sep 5 75–100
Fennel Mar 14 May 16 May 23 — Jul 25 – Sep 5 60–90
Garlic — — — Aug 28 Nov 27 – Mar 12 90–240
Green Beans — May 16 — — Jul 11 – Sep 5 50–65
Horseradish — — May 23 — Sep 26 – Dec 5 120–180
Hot Peppers Feb 28 May 16 May 23 — Aug 1 – Nov 7 70–120
Hubbard Squash Apr 4 May 16 May 23 — Sep 5 – Oct 10 100–120
Kabocha Apr 4 May 16 May 23 — Aug 22 – Sep 19 85–100
Kai Lan Apr 4 Apr 25 May 9 Jul 31 Jun 27 – Jul 25 45–60
Kale Apr 4 Apr 25 May 9 Jul 31 Jul 4 – Aug 29 50–70
Kidney Beans — May 16 — — Aug 15 – Sep 19 85–110
Kohlrabi Apr 4 Apr 25 May 9 Jul 31 Jun 27 – Aug 1 45–65
Komatsuna Apr 4 Apr 25 May 9 Jul 31 Jun 13 – Jul 18 35–50
Leeks Apr 4 Apr 25 May 9 Jul 31 Aug 8 – Oct 24 90–150
Lentils Apr 4 Apr 25 May 9 Jul 31 Aug 1 – Sep 12 80–110
Lettuce Apr 4 Apr 25 May 9 Jul 31 Jun 13 – Aug 22 30–60
Lima Beans — May 16 — — Jul 18 – Aug 29 60–90
Loofah Mar 14 May 16 May 23 — Sep 5 – Nov 7 100–150
Luffa Mar 14 May 16 May 23 — Aug 22 – Nov 7 90–150
Mache Apr 4 Apr 25 May 9 Jul 31 Jun 20 – Jul 25 40–60
Melon Apr 4 May 16 May 23 — Aug 1 – Sep 19 70–100
Microgreens Apr 4 Apr 25 May 9 Jul 31 May 16 – Jun 13 7–21
Mitsuba Apr 4 Apr 25 May 2 Jul 31 Jun 27 – Aug 22 50–70
Mizuna Apr 4 Apr 25 May 9 Jul 31 Jun 13 – Jul 11 30–45
Mustard Greens Apr 4 Apr 25 May 9 Jul 31 Jun 13 – Aug 15 30–50
Napa Cabbage Apr 4 Apr 25 May 9 Jul 31 Jul 4 – Aug 8 55–75
New Zealand Spinach Mar 14 May 16 May 23 — Jul 18 – Aug 15 55–70
Okra Mar 14 May 16 May 23 — Jul 18 – Sep 12 50–65
Onion Apr 4 Apr 25 May 9 Jul 31 Aug 8 – Sep 26 90–120
Pac Choi Apr 4 Apr 25 May 9 Jul 31 Jun 20 – Jul 18 40–55
Parsnip — Apr 25 — Jul 31 Aug 8 – Sep 19 100–130
Patty Pan Squash Apr 4 May 16 May 23 — Jul 11 – Aug 8 45–60
Peas Apr 4 Apr 25 May 9 Jul 31 Jul 4 – Aug 29 55–70
Peppers Feb 28 May 16 May 23 — Jul 25 – Oct 3 60–90
Pole Beans Mar 14 May 16 May 23 — Jul 18 – Sep 12 55–70
Potatoes Mar 14 May 16 May 23 — Aug 1 – Oct 10 70–120
Pumpkin Apr 4 May 16 May 23 — Aug 22 – Oct 10 85–120
Purslane Apr 4 Apr 25 May 9 Jul 31 Jun 20 – Jul 25 40–60
Radicchio Apr 4 Apr 25 May 9 Jul 31 Jul 11 – Aug 15 60–80
Radish — Apr 25 — Jul 31 May 23 – Jun 13 22–35
Rhubarb — — May 30 — — 365–730
Romanesco Apr 4 Apr 25 May 9 Jul 31 Jul 25 – Sep 5 75–100
Rutabaga — Apr 25 — Jul 31 Jul 18 – Aug 22 80–100
Salsify — Apr 25 — Jul 31 Aug 8 – Sep 19 100–130
Savoy Cabbage Apr 4 Apr 25 May 9 Jul 31 Jul 18 – Sep 12 70–110
Scallions Apr 4 Apr 25 May 9 Jul 31 Jul 4 – Aug 1 50–70
Scarlet Runner Beans Mar 14 May 16 May 23 — Jul 25 – Aug 29 60–80
Shallot Apr 4 Apr 25 May 9 Jul 31 Aug 8 – Sep 26 90–120
Shiso Mar 21 May 16 May 23 — Jul 18 – Sep 12 50–70
Snap Peas Mar 14 May 16 May 23 — Jul 18 – Sep 12 55–70
Snow Peas Apr 4 Apr 25 May 9 Jul 31 Jul 4 – Aug 29 50–65
Soybeans — May 16 — — Aug 8 – Oct 3 80–120
Spaghetti Squash Apr 4 May 16 May 23 — Aug 22 – Sep 19 85–100
Spinach Apr 4 Apr 25 May 9 Jul 31 Jun 13 – Aug 15 35–50
Squash (Summer) Apr 4 May 16 May 23 — Jul 11 – Sep 12 45–65
Squash (Winter) Apr 4 May 16 May 23 — Aug 15 – Oct 10 80–120
Sunchoke — — May 23 — Sep 12 – Nov 7 110–150
Sweet Corn — May 16 — — Jul 18 – Aug 29 60–90
Sweet Potatoes Mar 14 May 16 May 23 — Aug 22 – Oct 10 90–120
Tatsoi Apr 4 Apr 25 May 9 Jul 31 Jun 13 – Jul 18 35–50
Tomatillo Mar 14 May 16 May 23 — Jul 25 – Oct 3 60–85
Tomatoes Mar 14 May 16 May 23 — Jul 25 – Oct 3 60–85
Turnip — Apr 25 — Jul 31 Jun 6 – Jul 11 40–60
Watercress Apr 4 Apr 25 May 9 Jul 31 Jun 20 – Jul 25 40–60
Watermelon Apr 4 May 16 May 23 — Aug 1 – Sep 19 70–100
Wax Beans — May 16 — — Jul 11 – Sep 5 50–65
Winter Melon Mar 14 May 16 May 23 — Aug 22 – Oct 10 90–120
Yard Long Beans Mar 14 May 16 May 23 — Jul 18 – Aug 29 55–80
Zucchini Apr 4 May 16 May 23 — Jul 11 – Sep 5 45–60

🍓 Fruits to Grow in Ottawa County

27 fruits that grow well in Zone 6a with planting dates for Ottawa County.

Show all 27 fruits with planting dates
Plant Start Indoors Direct Sow Transplant Fall Plant Harvest Days to Maturity
Alpine Strawberries — — May 30 — Aug 29 – Dec 12 90–180
Aronia — — May 30 — — 730–1095
Blackberries — — May 30 — — 365–730
Blueberries — — May 30 — — 730–1095
Boysenberries — — May 30 — — 365–730
Cantaloupe — — May 30 — Aug 8 – Sep 12 70–90
Che Fruit — — May 30 — — 1095–1825
Cranberries — — May 30 — — 730–1095
Currants — — May 30 — — 730–1095
Elderberries — — May 30 — — 730–1095
Goji Berries — — May 30 — — 730–1095
Gooseberries — — May 30 — — 730–1095
Grapes — — May 30 — — 730–1095
Ground Cherry — — May 30 — Aug 8 – Oct 3 65–80
Hardy Kiwi — — May 30 — — 1095–1825
Haskaps — — May 30 — — 730–1095
Honeydew — — May 30 — Aug 22 – Oct 3 80–110
Jostaberry — — May 30 — — 730–1095
Lingonberries — — May 30 — — 730–1095
Medlar — — May 30 — — 1095–1825
Mulberries — — May 30 — — 730–1825
Pawpaw — — May 30 — — 1095–2555
Persimmon — — May 30 — — 1095–2555
Quince — — May 30 — — 1095–1825
Raspberries — — May 30 — — 365–730
Serviceberries — — May 30 — — 730–1095
Strawberries — — May 30 — Aug 29 – Dec 12 90–365

🌿 Herbs to Grow in Ottawa County

35 herbs that grow well in Zone 6a with planting dates for Ottawa County.

Show all 35 herbs with planting dates
Plant Start Indoors Direct Sow Transplant Fall Plant Harvest Days to Maturity
Angelica Apr 4 Apr 25 May 2 Jul 31 — 365–730
Anise Apr 4 Apr 25 May 2 Jul 31 Aug 1 – Oct 17 90–120
Basil Mar 21 May 16 May 23 — Jul 18 – Sep 19 50–75
Bee Balm — — May 16 — Aug 15 – Oct 31 90–120
Borage Apr 4 Apr 25 May 2 Jul 31 Jun 27 – Aug 15 50–60
Caraway Apr 4 Apr 25 May 2 Jul 31 — 365–450
Catnip — — May 16 — Jul 18 – Sep 19 60–80
Chamomile Apr 4 Apr 25 May 2 Jul 31 Jul 4 – Sep 12 60–90
Chervil Apr 4 Apr 25 May 2 Jul 31 Jun 13 – Aug 15 40–60
Chives — — May 16 — Jul 18 – Sep 26 60–90
Cilantro Apr 4 Apr 25 May 2 Jul 31 Jun 13 – Aug 15 40–60
Comfrey — — May 16 — Jul 18 – Sep 26 60–90
Cumin Apr 4 Apr 25 May 2 Jul 31 Aug 15 – Oct 17 100–120
Dill Apr 4 Apr 25 May 2 Jul 31 Jun 13 – Aug 15 40–60
Epazote Mar 21 May 16 May 23 — Jul 11 – Sep 5 45–60
Fennel (herb) Apr 4 Apr 25 May 2 Jul 31 Jul 4 – Sep 12 60–90
Feverfew — — May 16 — Aug 15 – Oct 31 90–120
Garlic Chives — — May 16 — Jul 18 – Sep 26 60–90
Horehound — — May 16 — Aug 1 – Sep 26 75–90
Hyssop — — May 16 — Jul 25 – Sep 26 70–90
Lemon Balm — — May 16 — Jul 18 – Sep 5 60–70
Lemon Thyme — — May 16 — Jul 25 – Sep 26 70–90
Lovage — — May 16 — Jul 25 – Sep 26 70–90
Marjoram — — May 16 — Jul 18 – Sep 26 60–90
Mint — — May 16 — Jul 18 – Sep 26 60–90
Oregano — — May 16 — Jul 18 – Sep 26 60–90
Parsley Apr 4 Apr 25 May 2 Jul 31 Jul 4 – Sep 5 60–80
Rue — — May 16 — Jul 25 – Sep 26 70–90
Sage — — May 16 — Aug 1 – Sep 26 75–90
Savory — — May 16 — Jul 11 – Sep 5 50–70
Sorrel Apr 4 Apr 25 May 2 Jul 31 Jun 13 – Aug 15 40–60
Tarragon — — May 16 — Jul 18 – Sep 26 60–90
Thai Basil Mar 21 May 16 May 23 — Jul 18 – Sep 19 50–75
Thyme — — May 16 — Jul 25 – Sep 26 70–90
Valerian — — May 16 — Sep 19 – Nov 28 120–180

🌸 Flowers to Grow in Ottawa County

53 flowers that grow well in Zone 6a with planting dates for Ottawa County.

Show all 53 flowers with planting dates
Plant Start Indoors Direct Sow Transplant Fall Plant Bloom Days to Maturity
Ageratum Mar 21 May 9 May 9 — Jul 4 – Oct 10 60–75
Alliums — — — Aug 28 Sep 25 – Oct 23 28–42
Anemones Apr 11 — May 9 — Jun 13 – Jul 11 90–120
Astilbe Mar 7 — May 16 — Jul 25 – Oct 3 70–100
Bachelor's Button Mar 28 Apr 11 May 9 Aug 28 Jul 11 – Sep 26 60–90
Begonias Feb 28 — May 16 — Jul 25 – Oct 24 70–90
Black-eyed Susan Mar 7 May 9 May 16 — Aug 1 – Nov 14 60–80
Bleeding Hearts Mar 7 — May 16 — Jul 11 – Aug 15 60–90
Calendula Mar 28 Apr 11 May 9 — Jun 27 – Sep 26 50–70
California Poppy — Apr 11 — — Jun 20 – Aug 1 60–90
Celosia Apr 4 May 16 May 16 — Jul 18 – Oct 31 60–90
Columbine Mar 7 May 23 May 23 — Jul 18 – Aug 22 70–100
Coreopsis Mar 7 May 16 May 16 — Jul 25 – Nov 14 60–80
Cosmos Apr 11 May 9 May 9 — Jul 18 – Oct 24 60–90
Crocus — — — Aug 28 Jul 17 – Aug 7 10–20
Daffodils — — — Aug 28 Jul 24 – Aug 14 20–40
Dahlias Apr 11 May 16 May 16 — Aug 1 – Nov 14 70–120
Daylily Mar 7 — May 16 — Aug 1 – Nov 14 60–90
Dianthus Mar 14 Apr 11 Apr 25 — Jun 13 – Sep 12 60–80
Echinacea (Purple Coneflower) Mar 7 May 23 May 23 — Aug 15 – Nov 21 70–90
Foxglove Mar 7 May 16 May 16 — Jul 11 – Aug 15 80–120
Gaillardia (Blanket Flower) Mar 21 May 16 May 16 — Jul 25 – Nov 28 70–100
Geraniums Feb 28 — May 16 — Jul 25 – Oct 24 70–100
Gladiolus — May 9 May 9 — Jul 25 – Nov 7 70–100
Hostas Feb 28 — May 16 — Aug 1 – Nov 14 60–90
Hyacinths — — — Aug 28 Aug 14 – Sep 4 14–28
Hydrangeas Feb 28 — May 16 — Jul 25 – Oct 31 90–150
Impatiens Mar 14 — May 16 — Jul 25 – Oct 31 60–75
Irises — Division May 16 — Jul 11 – Aug 8 60–100
Larkspur — Apr 11 — — Jun 20 – Aug 15 60–90
Lavender Feb 28 — May 23 — Aug 1 – Sep 26 90–120
Lilies — Division May 16 — Jul 25 – Oct 31 70–120
Lobelia Mar 7 — Apr 25 — Jun 20 – Sep 12 70–80
Lupine Mar 7 May 16 May 16 — Jul 11 – Aug 15 75–100
Marigolds Mar 28 May 16 May 16 — Jul 11 – Oct 10 50–70
Nasturtium Apr 11 May 16 May 16 — Jul 11 – Oct 31 55–65
Pansy Feb 28 — May 9 Aug 14 Jul 4 – Sep 5 70–90
Peonies — Division May 16 — Jul 18 – Aug 22 90–120
Petunia Mar 14 — May 16 — Jul 25 – Oct 31 70–90
Phlox Mar 7 May 16 May 16 — Jul 25 – Oct 17 80–110
Portulaca Apr 4 May 16 May 16 — Jul 4 – Oct 17 50–70
Ranunculus Mar 28 — May 9 — Jun 20 – Jul 18 90–120
Roses Feb 28 — May 16 — Jul 25 – Nov 14 90–180
Salvia Mar 7 — May 16 — Jul 25 – Oct 31 70–90
Sedum (Stonecrop) Mar 7 — May 16 — Sep 5 – Nov 21 60–90
Snapdragon Feb 28 Apr 18 May 9 — Jul 18 – Sep 26 70–100
Sunflower Apr 18 May 16 May 16 — Aug 8 – Oct 31 70–100
Sweet Alyssum Mar 21 Apr 18 May 9 — Jun 20 – Aug 29 45–60
Sweet Pea Mar 28 Apr 4 May 9 — Jul 25 – Oct 3 65–85
Tulips — — — Aug 28 Aug 7 – Sep 4 15–30
Vinca (Annual) Feb 28 — May 16 — Jul 25 – Oct 31 70–90
Yarrow Mar 7 May 9 May 16 — Jul 25 – Nov 14 60–90
Zinnia Apr 11 May 16 May 16 — Jul 25 – Oct 31 60–70

Monthly Planting Guide for Ottawa County

Gardening Guides & Resources

Helpful guides from The Ultimate Homestead to improve your garden in Ottawa County.

🌿
Bucket Gardening Read guide →
🌿
How to Grow Spinach Read guide →
🌿
How to Grow Peas Read guide →
🌿
How to Design a Small Garden Read guide →
🌿
Urban Gardening Guide Read guide →
🌿
Full Sun Container Plants Read guide →

Frequently Asked Questions

What planting zone is Ottawa County, MI?

Ottawa County is in USDA Hardiness Zone 6a. This zone classification determines which perennial plants survive winter and sets the baseline for frost timing across the county.

When is the last frost in Ottawa County, MI?

Based on 30 years of NOAA weather station data, the median last spring frost in Ottawa County falls around May 9. Plan transplants and direct-sow dates relative to this date.

When is the first fall frost in Ottawa County, MI?

The median first fall frost in Ottawa County arrives around October 9. Harvest or protect frost-sensitive crops — tomatoes, peppers, basil, squash — before this date.

🌱

Your Ottawa County Garden Planner — Free

A 22-page printable planner built for Ottawa County (Zone 6a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.

Instant PDF download. No spam, unsubscribe any time.

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The Gardener's Encyclopedia to Companion Planting

The Gardener's Encyclopedia to Companion Planting

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The pairings that make vegetables, herbs, and flowers grow better — and the ones that quietly wreck a bed.

  • Proven pairings for 200+ vegetables, herbs, flowers, and fruits
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Seed Saving & Storage Guide

Seed Saving & Storage Guide

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Most saved seeds go bad before next season. This shows exactly when to pick, how to dry, and where to store seeds from 200 plants so yours don't.

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Composting Guide for Homesteaders

Composting Guide for Homesteaders

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Turn kitchen scraps and yard waste into compost that actually feeds the garden — instead of a pile that smells, attracts pests, and never breaks down.

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Data sources: USDA Plant Hardiness Zone Map (2023), NOAA 30-Year Climate Normals. Frost dates represent 50% probability averages; local conditions vary by elevation and microclimate. Last updated: July 2026.

Sources & credits

Every number on this page traces back to a primary horticulture or government data source. Click through to verify.

Plant varieties + growing data

Soil survey + temperature data

Drought monitoring

Household-consumption benchmarks

Derived

Other

Frost dates

Modeling

Precipitation + climate normals

Curated

Pest + disease pressure

Local extension offices

Daylight hours + sun data

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