Annual Flower

When to Plant Zinnias in Texas

The cut-and-come-again champion. The more you cut zinnias, the more they bloom. A cottage garden essential.

The Short Answer

Zinnias and Texas heat are a legendary combination — the flower thrives in blazing sun and hot conditions that wilt more delicate plants. Texas gardeners grow zinnias from April through November, producing some of the longest-blooming flower displays in the country.

Texas Frost Dates

Your planting dates depend on which part of Texas you're in. Here are the frost date ranges by region:

Region Zones Last Frost (Spring) First Frost (Fall)
North Texas (Dallas) 7b, 8a Mar 10 - Mar 25 Nov 5 - Nov 20
Central Texas (Austin/SA) 8a, 8b Feb 25 - Mar 15 Nov 15 - Dec 5
South Texas (Valley) 9a, 9b, 10a Jan 15 - Feb 10 Dec 10 - Jan 5
Texas Panhandle 6b, 7a Apr 10 - Apr 25 Oct 10 - Oct 25
East Texas 8a, 8b Mar 1 - Mar 20 Nov 10 - Nov 25

Zinnias Planting Schedule for Texas

North Texas (Dallas) (Zones 7b, 8a)

Average last frost: Mar 10 - Mar 25 · Average first frost: Nov 5 - Nov 20

Start Seeds Indoors
4 wks before frost
Transplant Outside
1 wks after frost
Direct Sow
1 wks after frost

Central Texas (Austin/SA) (Zones 8a, 8b)

Average last frost: Feb 25 - Mar 15 · Average first frost: Nov 15 - Dec 5

Start Seeds Indoors
4 wks before frost
Transplant Outside
1 wks after frost
Direct Sow
1 wks after frost

South Texas (Valley) (Zones 9a, 9b, 10a)

Average last frost: Jan 15 - Feb 10 · Average first frost: Dec 10 - Jan 5

Start Seeds Indoors
4 wks before frost
Transplant Outside
1 wks after frost
Direct Sow
1 wks after frost

Texas Panhandle (Zones 6b, 7a)

Average last frost: Apr 10 - Apr 25 · Average first frost: Oct 10 - Oct 25

Start Seeds Indoors
4 wks before frost
Transplant Outside
1 wks after frost
Direct Sow
1 wks after frost

East Texas (Zones 8a, 8b)

Average last frost: Mar 1 - Mar 20 · Average first frost: Nov 10 - Nov 25

Start Seeds Indoors
4 wks before frost
Transplant Outside
1 wks after frost
Direct Sow
1 wks after frost

Growing Zinnias in Texas

State-Specific Growing Tips

Direct sow from mid-March (south Texas) through April (north Texas). Zinnias love Texas heat and produce prolifically in full sun. Water at the base to prevent foliar disease. The state's dry periods actually benefit zinnias — the flowers prefer moderate water rather than constant moisture. Succession plant every 3-4 weeks for continuous color.

Recommended Varieties for Texas

Benary's Giant for cutting. Zinderella series for scabiosa-flowered types. Oklahoma series for large blooms bred for hot conditions. Any variety handles Texas heat.

Common Challenges in Texas

Powdery mildew, though less severe than in humid eastern states. Spider mites in hot, dry conditions. Japanese beetles are less common in Texas. The crop is remarkably trouble-free in Texas.

Growing Tips

Water at the base to prevent powdery mildew. Cut flowers just above a leaf node to encourage more branching and blooms.

Companion Planting

Plant zinnias alongside these companions for better growth:

Tomatoes Peppers

The Bottom Line

Zinnias can be grown successfully in Texas with proper attention to regional frost dates and local growing conditions. Timing varies across the state — North Texas (Dallas) gardeners work with a last frost around Mar 10 - Mar 25, while East Texas sees frost end around Mar 1 - Mar 20. Choose varieties suited to your region, amend your soil based on its specific needs, and monitor for the pests and diseases most common in your area. For exact dates based on your zip code, use our free planting date finder.

Related Guides

Zinnias Growing Guide National planting guide with all states Texas Planting Calendar All plants for Texas Zinnias in Alabama Alabama planting dates Zinnias in Alaska Alaska planting dates Zinnias in Arizona Arizona planting dates Zinnias in Arkansas Arkansas planting dates
Note: All dates are based on NOAA 30-year Climate Normals and represent historical averages, not predictions for any specific year. Always check your local weather forecast before planting frost-sensitive crops. Learn about our data sources.

Last reviewed: March 29, 2026

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