When to Plant Broccoli in Dallas, TX
Published: April 21, 2026
Broccoli Planting Dates for Dallas, TX
| Start seeds indoors | January 4–11 |
| Last frost (average) | February 15 |
| Transplant outdoors | January 18–28 |
| Direct sow outdoors | January 18–28 |
| Minimum soil temperature | 40°F |
| Expect first harvest | March 19 – April 8 |
| Fall crop planting | September 22–October 2 |
| Fall crop harvest | November 21 |
| First fall frost (average) | December 1 |
Best Broccoli Varieties for Dallas, TX
For Zone 8a Dallas, the best-performing broccoli varieties are Calabrese, DeCicco, and Packman — all rated for heat tolerance in warm-zone summers. Green Magic is a solid second choice for the fall crop where a quicker 60-day maturity makes the most of a shorter fall window. These varieties are typically stocked by local nurseries and are the safest bets for gardeners new to broccoli in Dallas.
Growing Broccoli in Dallas
Dallas sits in Zone 8a, with an average last frost of February 15 and first fall frost around December 1 — giving a 289-day frost-free growing season. Cool-season crops like broccoli benefit from Dallas's cooler spring and fall windows, when temperatures stay in the 55–75°F sweet spot that produces the best flavor and least bolting.
In Dallas's warm climate, broccoli works best as a fall, winter, and early-spring crop. Summer heat bolts most cool-season vegetables before they can produce a harvestable head or root. Plan primary plantings in October through February in Dallas, not April through June.
Dallas's heavy clay soil benefits from raised beds or deep organic matter amendment before planting broccoli. Clay retains moisture well but compacts easily — add 3 to 4 inches of compost and work it in to 12 inches before planting. Consistent watering (1.5 inches per week) is especially important in clay soil, which can crack and pull away from roots during dry spells; mulch around plants to stabilize moisture.
Broccoli Calendar for Dallas
| Month | Task |
|---|---|
| January | Start seeds indoors under grow lights |
| February | Last frost — harden off seedlings outdoors |
| January | Transplant outdoors into warm soil |
| March | Expect first harvest window to open |
| September | Start fall crop — transplants or direct sow |
| December | First fall frost — harvest remaining, end of outdoor season |
Broccoli Tips for Dallas Gardeners
- •For spring: start indoors 6 weeks before last frost and transplant outdoors 4 weeks before last frost.
- •For fall: start indoors in summer — count 10 weeks back from your first fall frost date.
- •Plant cool-season broccoli in Dallas during October through February — spring plantings bolt before producing a usable crop in warm zones.
Common Broccoli Pests in Dallas
- •Cabbage Worm — peaks June–August in Zone 8a (active March–October); green caterpillars on brassicas; apply Bt spray or use row covers.
- •Cabbage Looper — peaks June–August in Zone 8a (active March–October); loop-walking green caterpillars; Bt spray works well.
- •Aphids — peaks June–August in Zone 8a (active March–October); clusters on leaf undersides; blast with a strong water spray or apply neem oil.
Check plants every 2–3 days during peak season — early intervention prevents most infestations from becoming serious.
What to Plant with Broccoli in Dallas
In Dallas's warm climate, Onion and Garlic are the most beneficial plants to grow alongside broccoli. Onion deters carrot fly, aphids, and several root-zone pests through sulfur compounds. Keep broccoli away from Tomato — it competes for nutrients or shares pest pressure. Warm-climate gardeners especially benefit from dense, layered companion plantings that shade soil and reduce water loss.
Frequently Asked Questions
When should I plant broccoli in Dallas, TX?
In Dallas (Zone 8a), start broccoli seeds indoors around January 4–11 and transplant outdoors around January 18–28. The city's average last frost of February 15 is the anchor date — count 6 weeks back for seed starting and 4 weeks back for transplanting.
What zone is Dallas, TX for broccoli growing?
Dallas is USDA Zone 8a. For broccoli, this means a frost-free growing season of roughly 41 weeks running from February 15 to December 1. Cool-season crops like broccoli thrive in this zone with both spring and fall planting windows available.
When is broccoli harvest season in Dallas?
Expect the first broccoli harvest in Dallas around March 19, with harvest continuing through April 8. This is based on 60–80 days from transplant or direct sow. A fall crop planted September 22–October 2 adds a second harvest around November 21.
How long does it take to grow broccoli in Dallas, TX?
From transplant or direct sow to first harvest, broccoli takes 60–80 days in Dallas's climate. Based on a typical planting date of January 18–28, expect your first harvest around March 19. Dallas's warm Zone 8a climate tends toward the faster end of this range — warmer soil and longer days accelerate maturity.
What soil does broccoli need in Dallas?
Dallas's heavy clay soil compacts easily and drains slowly — problematic for broccoli which needs oxygenated roots. Build a raised bed or amend deeply with 3–4 inches of compost worked into the top 12 inches. Add gypsum if the soil is severely compacted. Consistent watering matters especially in clay because the soil can crack and pull away from roots during dry spells.