When to Plant Rhubarb in Waco, Texas (76708)

Location

Waco, Texas

ZIP Code

76708

USDA Zone

Last Frost

Sunday, March 15, 2026

📅 Your 2026 Planting Dates

Start Seeds Indoors

Sunday, January 18, 2026

Transplant Outdoors

Sunday, March 29, 2026

Based on last frost Sunday, March 15, 2026 · Zone 8b

Pro tip: Start Rhubarb seeds indoors 8 weeks before your last frost date, then transplant outdoors around Sunday, March 29, 2026.

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🌿 Plant Details

Scientific Name Rheum rhabarbarum

Days to Maturity 365 days

☀️ Growing Requirements

☀️

Sun

Full Sun

💧

Water

Regular

Seeds typically germinate in 8-21 days

Ready to Plant Rhubarb in Waco?

Get your seeds now so they're ready by Sunday, January 18, 2026.

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🛠️ 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

🟡 Moderate

✅ Open-pollinated — seeds grow true to parent

When to Harvest Seed

Allow flower stalks to develop in early summer. Harvest when seeds in the large seed clusters turn brown.

Processing

Cut dried seed stalks, thresh to release seeds, winnow lightly.

Seed Viability

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

Pro Tip

Rhubarb seeds don't grow true to variety. For identical plants, propagate by crown division in early spring.

Frequently Asked Questions

When should I plant Rhubarb in Waco, Texas? +

In Waco (Zone 8b), start Rhubarb seeds indoors around Sunday, January 18, 2026 and transplant outdoors around Sunday, March 29, 2026.

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

The average last spring frost date for Waco, Texas (ZIP 76708) is around Sunday, March 15, 2026. This is based on NOAA climate normals for USDA Zone 8b.

How long does Rhubarb take to grow? +

Rhubarb typically matures in about 365 days from transplanting. In Waco, that means you can expect harvest around Sunday, March 29, 2026 plus 365 days.

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

Rhubarb should be started indoors 8 weeks before your last frost date. In Waco, that means starting around Sunday, January 18, 2026.

📚 More Rhubarb Planting Guides

🗺️

Rhubarb in Texas

Zone-by-zone breakdown · Full state guide

→ 🌡️

Zone 8b Rhubarb Guide

All cities in your zone · Avg dates

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Growing Rhubarb in Zone 8b

Rhubarb (Rheum rhabarbarum) is a popular garden vegetable. In Waco, Texas, which is in USDA Hardiness Zone 8b, you should start seeds indoors around Sunday, January 18, 2026.

Your average last frost date is Sunday, March 15, 2026. Plan to transplant your Rhubarb seedlings outdoors around Sunday, March 29, 2026, about 2 weeks after your last frost date.