When to Plant Sweet Alyssum in Amarillo, Texas (79110)

Location

Amarillo, Texas

ZIP Code

79110

USDA Zone

Last Frost

Friday, April 10, 2026

📅 Your 2026 Planting Dates

Direct Sow Outdoors

Friday, March 13, 2026

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

Pro tip: Sow Sweet Alyssum directly outdoors 4 weeks before your last frost date.

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🌿 Plant Details

Scientific Name Lobularia maritima

Days to Maturity 45 days

Mature Height 4-8"

Spread 9"

☀️ Growing Requirements

☀️

Sun

Full Sun to Partial Shade

💧

Water

Moderate (1 inch/week)

↔️

Spacing

6" apart

🌱

Planting Depth

0.125" deep

Seeds typically germinate in 5-10 days

Ready to Plant Sweet Alyssum in Amarillo?

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

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🤝 Good Companions

TomatoBroccoliLettuceVegetable Garden

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Full Companion Planting Guide for Sweet Alyssum

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

🛠️ Supplies You'll Need

🌍 Flower Garden Soil ✂️ Pruning Shears 🚿 Watering Can

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🌾 Seed Saving Guide

🟢 Easy

✅ Open-pollinated — seeds grow true to parent

When to Harvest Seed

Tiny seed pods form along stems after flowers fade. Harvest when stems are dry and tan.

Processing

Strip dried stems over a bowl — tiny seeds fall easily. Dry 1 week before storing.

Seed Viability

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

Pro Tip

Self-sows prolifically in mild climates — often naturalizes without any active seed saving.

🪴

Raised Bed Planting Guides

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

Frequently Asked Questions

When should I plant Sweet Alyssum in Amarillo, Texas? +

In Amarillo (Zone 7a), direct sow Sweet Alyssum outdoors around Friday, March 13, 2026.

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

The average last spring frost date for Amarillo, Texas (ZIP 79110) is around Friday, April 10, 2026. This is based on NOAA climate normals for USDA Zone 7a.

How long does Sweet Alyssum take to grow? +

Sweet Alyssum typically matures in about 45 days from direct sowing. In Amarillo, that means you can expect harvest around Friday, March 13, 2026 plus 45 days.

Should I start Sweet Alyssum indoors or direct sow in Texas? +

Sweet Alyssum does best when direct sown outdoors. In Amarillo, sow directly around Friday, March 13, 2026.

📚 More Sweet Alyssum Planting Guides

🗺️

Sweet Alyssum in Texas

Zone-by-zone breakdown · Full state guide

→ 🌡️

Zone 7a Sweet Alyssum Guide

All cities in your zone · Avg dates

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Growing Sweet Alyssum in Zone 7a

Sweet Alyssum (Lobularia maritima) is a popular garden vegetable. In Amarillo, Texas, which is in USDA Hardiness Zone 7a, you should direct sow seeds around Friday, March 13, 2026.

Your average last frost date is Friday, April 10, 2026. Sweet Alyssum grows well when direct sown, as it doesn't transplant well or germinates quickly outdoors.