When to Plant Lima Bean in Denton, Montana (59430)

Location

Denton, Montana

ZIP Code

59430

USDA Zone

Last Frost

Tuesday, May 5, 2026

📅 Your 2026 Planting Dates

Direct Sow Outdoors

Tuesday, May 5, 2026

Based on last frost Tuesday, May 5, 2026 · Zone 4b

Pro tip: Sow Lima Bean directly outdoors around your last frost date when soil starts to warm.

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🌿 Plant Details

Scientific Name Phaseolus lunatus

Days to Maturity 75 days

Mature Height 18-24"

Spread 6"

Type Bush

Fruit Size Medium (flat pods)

☀️ Growing Requirements

☀️

Sun

Full Sun (6-8 hours)

💧

Water

Regular (1 inch/week)

↔️

Spacing

6" apart

🌱

Planting Depth

1" deep

Seeds typically germinate in 7-14 days

Ready to Plant Lima Bean in Denton?

Get your seeds now so they're ready by Tuesday, May 5, 2026.

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🤝 Good Companions

CornSquashCucumberCarrot

⚠️ Avoid Planting Near

OnionGarlicFennel

🤝

Full Companion Planting Guide for Lima Bean

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

🛠️ Supplies You'll Need

🪵 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

Allow pods to dry and turn brown on the vine before picking.

Processing

Shell dried pods, cure seeds on screen for 2 weeks, then store in a cool dry place.

Seed Viability

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

Pro Tip

Lima beans self-pollinate before the flower opens — easy to keep varieties pure.

🪴

Raised Bed Planting Guides

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

Frequently Asked Questions

When should I plant Lima Bean in Denton, Montana? +

In Denton (Zone 4b), direct sow Lima Bean outdoors around Tuesday, May 5, 2026.

What is the last frost date for Denton, Montana? +

The average last spring frost date for Denton, Montana (ZIP 59430) is around Tuesday, May 5, 2026. This is based on NOAA climate normals for USDA Zone 4b.

How long does Lima Bean take to grow? +

Lima Bean typically matures in about 75 days from direct sowing. In Denton, that means you can expect harvest around Tuesday, May 5, 2026 plus 75 days.

Should I start Lima Bean indoors or direct sow in Montana? +

Lima Bean does best when direct sown outdoors. In Denton, sow directly around Tuesday, May 5, 2026.

📚 More Lima Bean Planting Guides

🗺️

Lima Bean in Montana

Zone-by-zone breakdown · Full state guide

→ 🌡️

Zone 4b Lima Bean Guide

All cities in your zone · Avg dates

→

Other Plants for Denton

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Growing Lima Bean in Zone 4b

Lima Bean (Phaseolus lunatus) is a popular garden vegetable. In Denton, Montana, which is in USDA Hardiness Zone 4b, you should direct sow seeds around Tuesday, May 5, 2026.

Your average last frost date is Tuesday, May 5, 2026. Lima Bean grows well when direct sown, as it doesn't transplant well or germinates quickly outdoors.