New Mexico planting calendar

When to plant brussels sprouts in New Mexico — sow, transplant & harvest dates

New Mexico is mostly USDA zone 7a (range 4b-9a). Dates below are derived from brussels sprouts's frost tolerance and New Mexico's frost window — not generic national averages.

Brussels Sprouts planting timetable for New Mexico

Stage	When in New Mexico	Anchor
Start seeds indoors	late January (January 31)	12 weeks before the last frost (late April)
Transplant outside	mid-April (April 11)	14 days before the last frost (late April)
First harvest (estimate)	early July (July 10)	~90 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 New Mexico's climate shifts the brussels sprouts dates

New Mexico's last spring frost averages late April and first fall frost late October, which sets the whole planting clock. New Mexico is a high-desert state where elevation, intense sun, and aridity matter as much as the winter low. The south runs much warmer than the mountains. Sow early — brussels sprouts bolt once daytime temperatures hold above 24 °C, so the earlier they go in, the longer the harvest.

Brussels sprouts are a long-season crop — transplant outdoors 2–3 weeks before the last spring frost once seedlings are 10–15 cm tall, or start a fall crop by counting back 90–100 days from the first fall frost and setting transplants then. Flavour sweetens after the first hard frost (below -2 °C), making them one of the few vegetables that actually improves with autumn cold. Zones 9–10 can grow them as a winter crop but the lack of hard frost reduces flavour development.

Frost-risk note

Don't plant before late April — a hard freeze can still set young plants back. In the high Sangre de Cristo mountains (zone 4b) the safe date runs a week or two later.

Regional variation within New Mexico

the high Sangre de Cristo mountains (zone 4b) runs roughly 1-2 weeks behind the state average; the southern Rio Grande and Chihuahuan desert (zone 9a) can plant 1-2 weeks earlier.

Albuquerque — USDA zone 7b
Las Cruces — USDA zone 8a
Santa Fe — USDA zone 6b
Roswell — USDA zone 8a

What else to plant in New Mexico 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: ~90 days from planting out.

Frequently asked questions

When is the best time to plant brussels sprouts in New Mexico?

In New Mexico (mostly USDA zone 7a), sow brussels sprouts indoors around late January, transplant outdoors mid-April (before the last frost, late April), and harvest from early July. Brussels Sprouts 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 New Mexico?

Most of New Mexico sits in USDA hardiness zone 7a, with the state spanning roughly 4b-9a from the high Sangre de Cristo mountains (zone 4b) to the southern Rio Grande and Chihuahuan desert (zone 9a). The last spring frost averages late April and the first fall frost late October.

Can you grow brussels sprouts in New Mexico?

Yes. New Mexico's dominant zone 7a supports brussels sprouts — the key is timing. Brussels Sprouts 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 New Mexico?

the high Sangre de Cristo mountains (zone 4b) runs roughly 1-2 weeks behind the state average; the southern Rio Grande and Chihuahuan desert (zone 9a) can plant 1-2 weeks earlier.

What else can I plant in New Mexico 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.