When to Plant Fennel in Bowbells, North Dakota (58721)

Location

Bowbells, North Dakota

ZIP Code

58721

USDA Zone

Last Frost

Friday, May 15, 2026

📅 Your 2026 Planting Dates

Start Seeds Indoors

Friday, April 17, 2026

Transplant Outdoors

Friday, May 1, 2026

Based on last frost Friday, May 15, 2026 · Zone 4a

Pro tip: Start Fennel seeds indoors 4 weeks before your last frost date, then transplant outdoors around Friday, May 1, 2026.

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🌿 Plant Details

Scientific Name Foeniculum vulgare

Days to Maturity 80 days

☀️ Growing Requirements

☀️

Sun

Full Sun

💧

Water

Regular

Seeds typically germinate in 7-14 days

Ready to Plant Fennel in Bowbells?

Get your seeds now so they're ready by Friday, April 17, 2026.

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🤝 Good Companions

Dill

🤝

Full Companion Planting Guide for Fennel

See which plants help Fennel thrive, which to keep away, and raised bed layout tips →

🛠️ Supplies You'll Need

🌱 Seed Starting Trays 🪴 Seed Starting Mix 💡 Grow Lights 🌡️ Heat Mat 🪵 Raised Garden Bed 🌍 Vegetable Garden Soil 🛠️ Hand Trowel Set 🚿 Watering Can

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🌾 Seed Saving Guide

🟢 Easy

✅ Open-pollinated — seeds grow true to parent

When to Harvest Seed

Harvest umbels when seeds turn gray-green to brown — just before they drop.

Processing

Cut seed heads into a bag, dry 1–2 weeks, thresh to separate seeds.

Seed Viability

Up to 4 years when stored cool, dark, and dry.

Pro Tip

Fennel cross-pollinates with dill — keep at least 300 feet apart or sacrifice one crop when saving seed.

Frequently Asked Questions

When should I plant Fennel in Bowbells, North Dakota? +

In Bowbells (Zone 4a), start Fennel seeds indoors around Friday, April 17, 2026 and transplant outdoors around Friday, May 1, 2026.

What is the last frost date for Bowbells, North Dakota? +

The average last spring frost date for Bowbells, North Dakota (ZIP 58721) is around Friday, May 15, 2026. This is based on NOAA climate normals for USDA Zone 4a.

How long does Fennel take to grow? +

Fennel typically matures in about 80 days from transplanting. In Bowbells, that means you can expect harvest around Friday, May 1, 2026 plus 80 days.

Should I start Fennel indoors or direct sow in North Dakota? +

Fennel should be started indoors 4 weeks before your last frost date. In Bowbells, that means starting around Friday, April 17, 2026.

📚 More Fennel Planting Guides

🗺️

Fennel in North Dakota

Zone-by-zone breakdown · Full state guide

→ 🌡️

Zone 4a Fennel Guide

All cities in your zone · Avg dates

→

Other Plants for Bowbells

Blackberry Blueberry Raspberry Strawberry Basil Chamomile Chives Cilantro Dill Lavender Lemon Balm Marjoram Mint Oregano Parsley Rosemary Sage Tarragon Thyme Acorn Squash Artichoke Arugula Asparagus Beefsteak Tomato Beet Bell Pepper Bok Choy Broccoli Brussels Sprout Butternut Squash Cabbage Cantaloupe Carrot Cauliflower Cayenne Pepper Celery Cherry Tomato Chili Pepper Collard Green Common Bean Cucumber Eggplant Endive Garlic Grape Tomato Green Bean Habanero Pepper Head Lettuce Heirloom Tomato Honeydew Melon Jalapeño Pepper Kale Kohlrabi Leaf Lettuce Leek Lima Bean Mustard Okra Onion Parsnip Pea Poblano Pepper Pole Pea Potato Pumpkin Radicchio Radish Rhubarb Roma Tomato Rutabaga Serrano Pepper Shallot Snap Pea Snow Pea Spaghetti Squash Spinach Squash Sweet Corn Sweet Potato Swiss Chard Tomato Turnip Watermelon Zucchini Sunflower Marigold Zinnia Nasturtium Cosmos Echinacea (Coneflower) Petunia Black-eyed Susan Apple Tree Pear Tree Peach Tree Plum Tree Sweet Cherry Tree Lemon Tree Borage Lemongrass Ginger Stevia Tomatillo Edamame Fava Bean Mâche Mizuna Sorrel Shishito Pepper Banana Pepper Watermelon Radish Napa Cabbage Popcorn Broccoli Raab Catnip Valerian Lemon Verbena Bee Balm Anise Lovage Chervil Summer Savory Dahlia Snapdragon Pansy Sweet Pea Morning Glory Hollyhock Larkspur Bachelor Button Columbine Impatiens Salvia (Annual) Sweet Alyssum Celosia Lupine Verbena Elderberry Grape Vine Red Currant Gooseberry Serviceberry Fig Tree Avocado Tree Persimmon Tree Olive Tree

Growing Fennel in Zone 4a

Fennel (Foeniculum vulgare) is a popular garden vegetable. In Bowbells, North Dakota, which is in USDA Hardiness Zone 4a, you should start seeds indoors around Friday, April 17, 2026.

Your average last frost date is Friday, May 15, 2026. Plan to transplant your Fennel seedlings outdoors around Friday, May 1, 2026, about -2 weeks after your last frost date.