When to Plant Dill in Box Elder, Montana (59521)

Location

Box Elder, Montana

ZIP Code

59521

USDA Zone

Last Frost

Friday, May 15, 2026

📅 Your 2026 Planting Dates

Direct Sow Outdoors

Friday, April 17, 2026

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

Pro tip: Sow Dill directly outdoors 4 weeks before your last frost date.

🌿 Plant Details

Scientific Name Anethum graveolens

Days to Maturity 40 days

Mature Height 24-36"

Spread 12"

Type Leaf

Fruit Size N/A

☀️ Growing Requirements

☀️

Sun

Full Sun (6-8 hours)

💧

Water

Moderate

↔️

Spacing

12" apart

🌱

Planting Depth

0.25" deep

Seeds typically germinate in 7-14 days

Ready to Plant Dill in Box Elder?

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

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🤝 Good Companions

CabbageOnionLettuceCucumber

⚠️ Avoid Planting Near

CarrotTomato

See the full companion planting guide for Dill →

🛠️ Supplies You'll Need

🪵 Raised Garden Bed 🌍 Vegetable Garden Soil 🛠️ Hand Trowel Set 🚿 Watering Can

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Common Dill Varieties

Popular cultivars to look for at your local nursery or seed supplier.

Mammoth

open-pollinated

Tall, vigorous dill growing to 5 feet; maximum seed production for pickling.

Fernleaf

hybrid 40d

Compact dwarf variety ideal for containers and small gardens; slow to bolt.

Bouquet

open-pollinated

Most popular all-purpose variety with abundant seeds and tender leaves for fresh use.

Dukat

open-pollinated

Scandinavian variety with extra-dark foliage and superior leaf flavor; slower bolting.

🌾 Seed Saving Guide

🟢 Easy

✅ Open-pollinated — seeds grow true to parent

When to Harvest Seed

Allow seed heads to fully mature and turn brown. Harvest before they shatter.

Processing

Cut entire seed head into a paper bag, allow to dry, shake out seeds.

Seed Viability

Up to 3 years when stored cool, dark, and dry.

Pro Tip

Dill cross-pollinates with fennel — keep at least 150 feet apart or sacrifice one species for seed purity.

🪴

Raised Bed Planting Guides

A 4×8 bed fits 32 plants of Dill. See plant counts, spacing grids, and companion pairings for every bed size →

Frequently Asked Questions

When should I plant Dill in Box Elder, Montana? +

In Box Elder (Zone 4a), direct sow Dill outdoors around Friday, April 17, 2026.

What is the last frost date for Box Elder, Montana? +

The average last spring frost date for Box Elder, Montana (ZIP 59521) is around Friday, May 15, 2026. This is based on NOAA climate normals for USDA Zone 4a.

How long does Dill take to grow? +

Dill typically matures in about 40 days from direct sowing. In Box Elder, that means you can expect harvest around Friday, April 17, 2026 plus 40 days.

Should I start Dill indoors or direct sow in Montana? +

Dill does best when direct sown outdoors. In Box Elder, sow directly around Friday, April 17, 2026.

📚 More Dill Planting Guides

🗺️

Dill in Montana

Zone-by-zone breakdown · Full state guide

→ 🌡️

Zone 4a Dill Guide

All cities in your zone · Avg dates

→

Other Plants for Box Elder

Blackberry Blueberry Raspberry Strawberry Basil Chamomile Chives Cilantro 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 Fennel 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 Dill in Zone 4a

Dill (Anethum graveolens) is a popular garden vegetable. In Box Elder, Montana, which is in USDA Hardiness Zone 4a, you should direct sow seeds around Friday, April 17, 2026.

Your average last frost date is Friday, May 15, 2026. Dill grows well when direct sown, as it doesn't transplant well or germinates quickly outdoors.