When to Plant Verbena in Walpole, New Hampshire (03608)

Location

Walpole, New Hampshire

ZIP Code

03608

USDA Zone

Last Frost

Saturday, April 25, 2026

📅 Your 2026 Planting Dates

Start Seeds Indoors

Saturday, February 28, 2026

Transplant Outdoors

Saturday, May 9, 2026

Based on last frost Saturday, April 25, 2026 · Zone 5b

Pro tip: Start Verbena seeds indoors 8 weeks before your last frost date, then transplant outdoors around Saturday, May 9, 2026.

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🌿 Plant Details

Scientific Name Verbena hybrida

Days to Maturity 85 days

Mature Height 6-18"

Spread 18"

☀️ Growing Requirements

☀️

Sun

Full Sun (6-8 hours)

💧

Water

Moderate (1 inch/week)

↔️

Spacing

12" apart

🌱

Planting Depth

0.125" deep

Seeds typically germinate in 14-21 days

Ready to Plant Verbena in Walpole?

Get your seeds now so they're ready by Saturday, February 28, 2026.

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🤝 Good Companions

MarigoldPetuniaSalvia

🤝

Full Companion Planting Guide for Verbena

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

🛠️ Supplies You'll Need

🌱 Seed Starting Trays 🪴 Seed Starting Mix 💡 Grow Lights 🌡️ Heat Mat 🌍 Flower Garden Soil ✂️ Pruning Shears 🚿 Watering Can

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🌾 Seed Saving Guide

🟡 Moderate

⚠️ Many varieties are F1 hybrid — look for OP/heirloom types

When to Harvest Seed

Allow flower clusters to dry on the plant. Collect dry seed clusters.

Processing

Break apart dry clusters to release seeds, dry 1 week in open envelope.

Seed Viability

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

Pro Tip

Most garden verbenas are F1 hybrids. Verbena bonariensis is a good open-pollinated alternative that grows true from seed.

🪴

Raised Bed Planting Guides

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

Frequently Asked Questions

When should I plant Verbena in Walpole, New Hampshire? +

In Walpole (Zone 5b), start Verbena seeds indoors around Saturday, February 28, 2026 and transplant outdoors around Saturday, May 9, 2026.

What is the last frost date for Walpole, New Hampshire? +

The average last spring frost date for Walpole, New Hampshire (ZIP 03608) is around Saturday, April 25, 2026. This is based on NOAA climate normals for USDA Zone 5b.

How long does Verbena take to grow? +

Verbena typically matures in about 85 days from transplanting. In Walpole, that means you can expect harvest around Saturday, May 9, 2026 plus 85 days.

Should I start Verbena indoors or direct sow in New Hampshire? +

Verbena should be started indoors 8 weeks before your last frost date. In Walpole, that means starting around Saturday, February 28, 2026.

📚 More Verbena Planting Guides

🗺️

Verbena in New Hampshire

Zone-by-zone breakdown · Full state guide

→ 🌡️

Zone 5b Verbena Guide

All cities in your zone · Avg dates

→

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Growing Verbena in Zone 5b

Verbena (Verbena hybrida) is a popular garden vegetable. In Walpole, New Hampshire, which is in USDA Hardiness Zone 5b, you should start seeds indoors around Saturday, February 28, 2026.

Your average last frost date is Saturday, April 25, 2026. Plan to transplant your Verbena seedlings outdoors around Saturday, May 9, 2026, about 2 weeks after your last frost date.