When to Plant Bee Balm in Boise, Idaho (83708)

Location

Boise, Idaho

ZIP Code

83708

USDA Zone

Last Frost

Friday, April 10, 2026

📅 Your 2026 Planting Dates

Start Seeds Indoors

Friday, February 13, 2026

Transplant Outdoors

Friday, April 24, 2026

Based on last frost Friday, April 10, 2026 · Zone 7a

Pro tip: Start Bee Balm seeds indoors 8 weeks before your last frost date, then transplant outdoors around Friday, April 24, 2026.

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🌿 Plant Details

Scientific Name Monarda didyma

Days to Maturity 365 days

Mature Height 24-48"

Spread 24"

☀️ Growing Requirements

☀️

Sun

Full Sun to Partial Shade

💧

Water

Regular (1-2 inches/week)

↔️

Spacing

18" apart

🌱

Planting Depth

0.125" deep

Seeds typically germinate in 10-21 days

Ready to Plant Bee Balm in Boise?

Get your seeds now so they're ready by Friday, February 13, 2026.

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🤝 Good Companions

TomatoPepperSquash

🤝

Full Companion Planting Guide for Bee Balm

See which plants help Bee Balm 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

Allow shaggy seed heads to dry fully on the stem. Harvest before winter winds scatter seeds.

Processing

Break apart dried seed heads over a bowl, separate seeds from chaff.

Seed Viability

Up to 2 years when stored cool, dark, and dry.

Pro Tip

Bee balm cross-pollinates between varieties and species — plants from saved seed may show color variation.

🪴

Raised Bed Planting Guides

A 4×8 bed fits 14 plants of Bee Balm. See plant counts, spacing grids, and companion pairings for every bed size →

Frequently Asked Questions

When should I plant Bee Balm in Boise, Idaho? +

In Boise (Zone 7a), start Bee Balm seeds indoors around Friday, February 13, 2026 and transplant outdoors around Friday, April 24, 2026.

What is the last frost date for Boise, Idaho? +

The average last spring frost date for Boise, Idaho (ZIP 83708) is around Friday, April 10, 2026. This is based on NOAA climate normals for USDA Zone 7a.

How long does Bee Balm take to grow? +

Bee Balm typically matures in about 365 days from transplanting. In Boise, that means you can expect harvest around Friday, April 24, 2026 plus 365 days.

Should I start Bee Balm indoors or direct sow in Idaho? +

Bee Balm should be started indoors 8 weeks before your last frost date. In Boise, that means starting around Friday, February 13, 2026.

📚 More Bee Balm Planting Guides

🗺️

Bee Balm in Idaho

Zone-by-zone breakdown · Full state guide

→ 🌡️

Zone 7a Bee Balm Guide

All cities in your zone · Avg dates

→

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Growing Bee Balm in Zone 7a

Bee Balm (Monarda didyma) is a popular garden vegetable. In Boise, Idaho, which is in USDA Hardiness Zone 7a, you should start seeds indoors around Friday, February 13, 2026.

Your average last frost date is Friday, April 10, 2026. Plan to transplant your Bee Balm seedlings outdoors around Friday, April 24, 2026, about 2 weeks after your last frost date.