When to Plant Sweet Pea in Cable, Wisconsin (54821)

Location

Cable, Wisconsin

ZIP Code

54821

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 Sweet Pea directly outdoors 4 weeks before your last frost date.

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🌿 Plant Details

Scientific Name Lathyrus odoratus

Days to Maturity 65 days

Mature Height 48-72"

Spread 8"

☀️ Growing Requirements

☀️

Sun

Full Sun (6-8 hours)

💧

Water

Regular (1-2 inches/week)

↔️

Spacing

6" apart

🌱

Planting Depth

1" deep

Seeds typically germinate in 10-21 days

Ready to Plant Sweet Pea in Cable?

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

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🤝 Good Companions

CarrotRadishSpinach

⚠️ Avoid Planting Near

OnionGarlic

🤝

Full Companion Planting Guide for Sweet Pea

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

🛠️ Supplies You'll Need

🌍 Flower Garden Soil ✂️ Pruning Shears 🚿 Watering Can

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🌾 Seed Saving Guide

🟢 Easy

✅ Open-pollinated — seeds grow true to parent

When to Harvest Seed

Allow seed pods to dry and turn tan on the vine. Pick before they pop open and throw seeds.

Processing

Shell dried pods, spread seeds to dry 1 week before storing.

Seed Viability

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

Pro Tip

Sweet peas are self-pollinating before flowers open — excellent for keeping varieties pure.

🪴

Raised Bed Planting Guides

A 4×8 bed fits 4 per sq ft of Sweet Pea. See plant counts, spacing grids, and companion pairings for every bed size →

Frequently Asked Questions

When should I plant Sweet Pea in Cable, Wisconsin? +

In Cable (Zone 4a), direct sow Sweet Pea outdoors around Friday, April 17, 2026.

What is the last frost date for Cable, Wisconsin? +

The average last spring frost date for Cable, Wisconsin (ZIP 54821) is around Friday, May 15, 2026. This is based on NOAA climate normals for USDA Zone 4a.

How long does Sweet Pea take to grow? +

Sweet Pea typically matures in about 65 days from direct sowing. In Cable, that means you can expect harvest around Friday, April 17, 2026 plus 65 days.

Should I start Sweet Pea indoors or direct sow in Wisconsin? +

Sweet Pea does best when direct sown outdoors. In Cable, sow directly around Friday, April 17, 2026.

📚 More Sweet Pea Planting Guides

🗺️

Sweet Pea in Wisconsin

Zone-by-zone breakdown · Full state guide

→ 🌡️

Zone 4a Sweet Pea Guide

All cities in your zone · Avg dates

→

Other Plants for Cable

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 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 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 Sweet Pea in Zone 4a

Sweet Pea (Lathyrus odoratus) is a popular garden vegetable. In Cable, Wisconsin, 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. Sweet Pea grows well when direct sown, as it doesn't transplant well or germinates quickly outdoors.