When to Plant Dill in Houston, Texas (77039)

Location

Houston, Texas

ZIP Code

77039

USDA Zone

Last Frost

Tuesday, February 10, 2026

📅 Planting Calendar

Direct Sow Outdoors Tuesday, January 13, 2026

Pro Tip: Sow Dill directly outdoors 4 weeks before your last frost date.

🌿 Plant Details

Scientific Name Anethum graveolens

Days to Maturity 40 days

Mature Height 24-36"

Spread 12"

Type Leaf

Fruit Size N/A

☀️ Growing Requirements

☀️

Sun

Full Sun (6-8 hours)

💧

Water

Moderate

↔️

Spacing

12" apart

🌱

Planting Depth

0.25" deep

Seeds typically germinate in 7-14 days

Ready to Plant Dill in Houston?

Get your seeds now so they're ready by Tuesday, January 13, 2026.

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🤝 Good Companions

CabbageOnionLettuceCucumber

⚠️ Avoid Planting Near

CarrotTomato

See the full companion planting guide for Dill →

🛠️ Supplies You'll Need

🪵 Raised Garden Bed 🌍 Vegetable Garden Soil 🛠️ Hand Trowel Set 🚿 Watering Can

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Common Dill Varieties

Popular cultivars to look for at your local nursery or seed supplier.

Mammoth

open-pollinated

Tall, vigorous dill growing to 5 feet; maximum seed production for pickling.

Fernleaf

hybrid 40d

Compact dwarf variety ideal for containers and small gardens; slow to bolt.

Bouquet

open-pollinated

Most popular all-purpose variety with abundant seeds and tender leaves for fresh use.

Dukat

open-pollinated

Scandinavian variety with extra-dark foliage and superior leaf flavor; slower bolting.

🌾 Seed Saving Guide

🟢 Easy

✅ Open-pollinated — seeds grow true to parent

When to Harvest Seed

Allow seed heads to fully mature and turn brown. Harvest before they shatter.

Processing

Cut entire seed head into a paper bag, allow to dry, shake out seeds.

Seed Viability

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

Pro Tip

Dill cross-pollinates with fennel — keep at least 150 feet apart or sacrifice one species for seed purity.

🪴

Raised Bed Planting Guides

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

Frequently Asked Questions

When should I plant Dill in Houston, Texas? +

In Houston (Zone 9b), direct sow Dill outdoors around Tuesday, January 13, 2026.

What is the last frost date for Houston, Texas? +

The average last spring frost date for Houston, Texas (ZIP 77039) is around Tuesday, February 10, 2026. This is based on NOAA climate normals for USDA Zone 9b.

How long does Dill take to grow? +

Dill typically matures in about 40 days from direct sowing. In Houston, that means you can expect harvest around Tuesday, January 13, 2026 plus 40 days.

Should I start Dill indoors or direct sow in Texas? +

Dill does best when direct sown outdoors. In Houston, sow directly around Tuesday, January 13, 2026.

Other Plants for Houston

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Growing Dill in Zone 9b

Dill (Anethum graveolens) is a popular garden vegetable. In Houston, Texas, which is in USDA Hardiness Zone 9b, you should direct sow seeds around Tuesday, January 13, 2026.

Your average last frost date is Tuesday, February 10, 2026. Dill grows well when direct sown, as it doesn't transplant well or germinates quickly outdoors.