When to Plant Verbena in Fort Knox, Kentucky (40121)

Location

Fort Knox, Kentucky

ZIP Code

40121

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 Verbena 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 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 Fort Knox?

Get your seeds now so they're ready by Friday, February 13, 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 Fort Knox, Kentucky? +

In Fort Knox (Zone 7a), start Verbena seeds indoors around Friday, February 13, 2026 and transplant outdoors around Friday, April 24, 2026.

What is the last frost date for Fort Knox, Kentucky? +

The average last spring frost date for Fort Knox, Kentucky (ZIP 40121) is around Friday, April 10, 2026. This is based on NOAA climate normals for USDA Zone 7a.

How long does Verbena take to grow? +

Verbena typically matures in about 85 days from transplanting. In Fort Knox, that means you can expect harvest around Friday, April 24, 2026 plus 85 days.

Should I start Verbena indoors or direct sow in Kentucky? +

Verbena should be started indoors 8 weeks before your last frost date. In Fort Knox, that means starting around Friday, February 13, 2026.

📚 More Verbena Planting Guides

🗺️

Verbena in Kentucky

Zone-by-zone breakdown · Full state guide

→ 🌡️

Zone 7a Verbena Guide

All cities in your zone · Avg dates

→

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Growing Verbena in Zone 7a

Verbena (Verbena hybrida) is a popular garden vegetable. In Fort Knox, Kentucky, 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 Verbena seedlings outdoors around Friday, April 24, 2026, about 2 weeks after your last frost date.