When to Plant Zinnia in Texas

Zinnia (Zinnia elegans) is a fast-growing, heat-loving annual that produces bold, dahlia-like blooms from early summer until hard frost. One of the easiest flowers to grow from direct-sown seed, zinnias thrive in hot, dry conditions and are magnets for butterflies and beneficial insects. They make excellent companion plants alongside marigolds in the vegetable garden.

Texas spans USDA hardiness zones 10a, 6b, 7a, 7b, 8a, 8b, 9a, 9b (with planting data available), so planting dates vary by your location within the state. Click your zone below for the most accurate dates.

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Click your county for exact Zinnia planting dates based on your local frost dates.

Hover over a county to see details. Click to view planting guide.

Zinnia Planting Calendar for Texas

▸ Zone 10a ~364 day growing season · Full guide →

Last frost: January 1 · First frost: December 31 · 364 day season

Activity	When	Date Range
Start Indoors	December 4	Dec 4 – Dec 18
Transplant Outdoors	November 20	Nov 20 – Dec 4
Direct Sow	November 20	Nov 20 – Dec 11
Bloom	January 29	Jan 29 – Aug 13

▸ Zone 6b ~205 day growing season · Full guide →

Last frost: April 3 · First frost: October 25 · 205 day season

Activity	When	Date Range
Start Indoors	March 6	Mar 6 – Mar 20
Transplant Outdoors	April 3	Apr 3 – Apr 17
Direct Sow	April 3	Apr 3 – Apr 24
Bloom	June 12	Jun 12 – Sep 18

▸ Zone 7a ~221 day growing season · Full guide →

Last frost: March 25 · First frost: November 1 · 221 day season

Activity	When	Date Range
Start Indoors	February 25	Feb 25 – Mar 11
Transplant Outdoors	March 25	Mar 25 – Apr 8
Direct Sow	March 25	Mar 25 – Apr 15
Bloom	June 3	Jun 3 – Sep 23

▸ Zone 7b ~235 day growing season · Full guide →

Last frost: March 18 · First frost: November 8 · 235 day season

Activity	When	Date Range
Start Indoors	February 18	Feb 18 – Mar 4
Transplant Outdoors	March 18	Mar 18 – Apr 1
Direct Sow	March 18	Mar 18 – Apr 8
Bloom	May 27	May 27 – Sep 30

▸ Zone 8a ~255 day growing season · Full guide →

Last frost: March 8 · First frost: November 18 · 255 day season

Activity	When	Date Range
Start Indoors	February 8	Feb 8 – Feb 22
Transplant Outdoors	March 1	Mar 1 – Mar 15
Direct Sow	March 1	Mar 1 – Mar 22
Bloom	May 10	May 10 – Sep 27

▸ Zone 8b ~276 day growing season · Full guide →

Last frost: February 25 · First frost: November 28 · 276 day season

Activity	When	Date Range
Start Indoors	January 28	Jan 28 – Feb 11
Transplant Outdoors	February 11	Feb 11 – Feb 25
Direct Sow	February 11	Feb 11 – Mar 4
Bloom	April 22	Apr 22 – Sep 23

▸ Zone 9a ~303 day growing season · Full guide →

Last frost: February 10 · First frost: December 10 · 303 day season

Activity	When	Date Range
Start Indoors	January 13	Jan 13 – Jan 27
Transplant Outdoors	January 20	Jan 20 – Feb 3
Direct Sow	January 20	Jan 20 – Feb 10
Bloom	March 31	Mar 31 – Sep 15

▸ Zone 9b ~329 day growing season · Full guide →

Last frost: January 25 · First frost: December 20 · 329 day season

Activity	When	Date Range
Start Indoors	December 28	Dec 28 – Jan 11
Transplant Outdoors	December 28	Dec 28 – Jan 11
Direct Sow	December 28	Dec 28 – Jan 18
Bloom	March 8	Mar 8 – Sep 6

Growing Tips for Texas

Direct-sow after last frost when soil reaches 60°F; seeds germinate in 5-7 days. In zones 3-5 a brief indoor start (4 weeks) is worthwhile but transplant carefully — zinnias dislike root disturbance. Deadhead frequently to extend bloom. Excellent cut flower; harvesting regularly encourages branching. Avoid overhead watering to reduce powdery mildew.

Zinnia in Other States

Frequently Asked Questions

When should I plant Zinnia in Texas?

Planting dates for Zinnia in Texas depend on your USDA zone. Texas spans zones 10a, 6b, 7a, 7b, 8a, 8b, 9a, 9b. Check the planting calendar above for your specific zone's frost dates and planting windows.

What zone is Texas for planting?

Texas contains USDA hardiness zones 10a, 6b, 7a, 7b, 8a, 8b, 9a, 9b. Your specific zone depends on your location within the state — northern and higher-elevation areas are in colder zones, while southern and coastal areas are warmer.

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