Texas planting calendar

When to plant collard greens in Texas — sow, transplant & harvest dates

Texas is mostly USDA zone 8b (range 6a-10a). Dates below are derived from collard greens's frost tolerance and Texas's frost window — not generic national averages.

Collard Greens planting timetable for Texas

Stage	When in Texas	Anchor
Start seeds indoors	mid-February (February 15)	4 weeks before the last frost (mid-March (most of state))
Transplant outside	late February (February 22)	21 days before the last frost (mid-March (most of state))
First harvest (estimate)	early May (May 3)	~70 days from transplant

Dates are state-wide averages for the dominant zone. Local microclimates — elevation, urban heat, coastal moderation — can shift the window by 1-2 weeks. Use the frost-date calculator for a date tuned to your town.

Why Texas's climate shifts the collard greens dates

Texas's last spring frost averages mid-March (most of state) and first fall frost mid-November (most of state), which sets the whole planting clock. Texas is huge and spans cold Panhandle plains to a nearly frost-free Gulf and Rio Grande Valley. Most of the state has a long, hot season in zones 8-9. Sow early — collard greens bolt once daytime temperatures hold above 24 °C, so the earlier they go in, the longer the harvest.

Collards are one of the hardiest brassicas, tolerating temperatures down to about -7 °C once established, and one of the most heat-tolerant — unlike kale or cabbage, they continue producing in summer heat above 32 °C, which is why they are a staple in Zones 7–9 year-round. Transplant 2–4 weeks before last spring frost, or direct-sow where the season allows; for a fall harvest, start transplants 8–10 weeks before first fall frost. Succession-plant for continuous leaf harvest.

Frost-risk note

Don't plant before mid-March (most of state) — a hard freeze can still set young plants back. In the northern Panhandle near Dalhart (zone 6a) the safe date runs a week or two later.

Regional variation within Texas

the northern Panhandle near Dalhart (zone 6a) runs roughly 1-2 weeks behind the state average; the lower Rio Grande Valley near Brownsville (zone 10a) can plant 1-2 weeks earlier.

Houston — USDA zone 9b
San Antonio — USDA zone 9a
Dallas — USDA zone 8b
Austin — USDA zone 9a
El Paso — USDA zone 8b

What else to plant in Texas around then

The same early window suits peas, lettuce, spinach, and onion sets.

Quick-grow guide

Sun: Full sun — 6+ hours direct.
Soil temperature for germination: 7-29 °C (45-85 °F).
Spacing: 18-24 inches (45-60 cm) between plants.
Days to harvest: ~70 days from planting out.

Frequently asked questions

When is the best time to plant collard greens in Texas?

In Texas (mostly USDA zone 8b), sow collard greens indoors around mid-February, transplant outdoors late February (before the last frost, mid-March), and harvest from early May. Collard Greens are cold-hardy — they tolerate frost and actively prefer cool weather, so they go in well before the last spring frost and bolt in summer heat.

What USDA zone is Texas?

Most of Texas sits in USDA hardiness zone 8b, with the state spanning roughly 6a-10a from the northern Panhandle near Dalhart (zone 6a) to the lower Rio Grande Valley near Brownsville (zone 10a). The last spring frost averages mid-March (most of state) and the first fall frost mid-November (most of state).

Can you grow collard greens in Texas?

Yes. Texas's dominant zone 8b supports collard greens — the key is timing. Collard Greens are cold-hardy — they tolerate frost and actively prefer cool weather, so they go in well before the last spring frost and bolt in summer heat.

Does the planting date change across Texas?

the northern Panhandle near Dalhart (zone 6a) runs roughly 1-2 weeks behind the state average; the lower Rio Grande Valley near Brownsville (zone 10a) can plant 1-2 weeks earlier.

What else can I plant in Texas around the same time?

The same early window suits peas, lettuce, spinach, and onion sets.

Source and methodology

State zone spans from the USDA Plant Hardiness Zone Map (2023); frost-date averages from NOAA Climate Data Online. Hot-state two-season timing cross-checked against the UF/IFAS Florida Gardening Calendar and the University of Arizona Cooperative Extension planting calendar. Curated by the Growli editorial team.