New Mexico · zones 6a–8a
When to plant kale in New Mexico.
Sow or transplant between Mar 13 to Apr 10 in a typical year, keyed to New Mexico's median last frost around Apr 20. A second, fall sowing fits Jul 25 to Sep 9. Dates below are state medians; your ZIP code shifts them by days to weeks.
The 2026 windows
Kale dates for a typical New Mexico season.
1 · Start indoors
Jan 30 to Feb 27
About 6 weeks before set-out. Warm spot, real light.
2 · Set out
Mar 13 to Apr 10
Keyed to the ~Apr 20 last frost. Sow 0.25" deep, 16" apart.
Fall round
Jul 25 to Sep 9
Counted back from the ~Oct 25 first frost.
Harvest
~45 days later
~2 lb per plant over ~16 weeks.
New Mexico spans more than one climate: Zone 7 is the most common zone, but the state runs 6a to 8a. That's why the planner works from your ZIP code's frost dates, not your zone: mountain and coastal gardens in the same state can be three weeks apart.
New Mexico growing notes
Kale is the crop in this bed most willing to sit through this state's first hard freeze, and a lot of gardeners think it tastes better for the wait.
One planting each season, not a running succession
Unlike a fast crop reseeded every couple of weeks, kale here is a single planting each time it goes in: set as a transplant rather than direct-sown seed, given a full 16 inches in the row, it takes 45 days before it has filled out enough to start cutting from regularly. Both the spring and fall windows work for it, one transplanting in spring, a separate one in fall.
Which of those two single plantings is worth the greater effort depends on where the garden sits. In the low desert toward 7b and 8a, mild winters mean a fall-transplanted bed can often keep producing leaves right through the cold months, which makes fall the stronger window down there. Up in the higher zones near 6a, a hard, sustained freeze is a real risk once winter sets in, and a fall planting needs to be established well before that arrives; a spring planting, timed to finish before summer heat builds, tends to be the more dependable of the two that high.
A generous yield and a taste test worth running yourself
A single kale plant, given its full 16 inches, can return around 2 pounds of leaf over a season, picked the way you'd pick chard: the larger outer leaves taken off a few at a visit while the center keeps pushing new growth. That habit of cutting a little and leaving the center is what gets a plant anywhere near that number instead of stopping it at one harvest.
Kale is also the crop here most willing to stay in the ground past the season's first hard freeze, and plenty of gardeners find a leaf cut after that freeze tastes noticeably milder than one cut the week before. Rather than take that on faith, cut a leaf from the same plant on both sides of the season's first hard freeze and taste them side by side; it costs nothing and settles the question better than any general claim could.
The leaf pests, and the two that work underground
Cabbage worms and loopers chew ragged holes across the flat leaves kale is actually grown for, and since the leaf itself, not a tight head, is the harvested part, a few holes cost less than the same caterpillar would cost a crop grown for its head. Checking leaf undersides for small green frass pellets and the pale caterpillars themselves, especially in deeply crinkled types like Redbor where they hide well in the folds, keeps a light problem from turning into a stripped plant. Flea beetles peck a stipple of small holes into young transplants, but an established kale plant with tough, mature leaves generally shrugs off feeding that would have stalled it as a seedling.
Aphids settle into the deep crinkles of curly-leaf varieties especially, tucked into folds a simple rinse won't reach, worth remembering before a leaf goes straight from garden to pan. Black rot enters through the leaf edge and works inward, turning the tissue yellow in a wedge with the veins inside it gone dark, almost black; there's no curing a leaf that's already showing it, only removing it and switching off overhead watering, which is how the bacteria spreads from leaf to leaf in the first place. Cabbage root maggot attacks underground, the larvae feeding on the roots and stem base of a young transplant until it wilts in daylight despite moist soil and eventually topples over; a collar of cardboard or heavy paper fitted snugly around the stem at transplanting, sitting flush with the soil, blocks the adult fly from laying eggs at the base where the damage starts.
In New Mexico: watch for
The pests that find kale here.
A middle-length season, about 188 frost-free days, means kale overlaps cabbage worms & loopers for a stretch each summer. Check plants every week or two and treat early.
Green caterpillars chewing ragged holes; green droppings.
Organic fix: Handpick, cover with netting, spray Bt.
Gray-green clusters tucked into the leaf folds.
Organic fix: Blast with water, then insecticidal soap.
Tiny holes peppering the young leaves.
Organic fix: Row cover from day one; diatomaceous earth.
Black rot
Yellow V-shaped wedges cutting in from the leaf edge, veins blackening inside.
Organic fix: Pull infected plants, water at the base, keep brassicas out of that bed 3 years.
Seedlings wilt, yellow and stall for no reason; white maggots tunnel the roots.
Organic fix: Row cover before the flies are up, when yellow rocket blooms; rotate the bed.
Your season math: New Mexico gives kale about 188 frost-free days, and it needs roughly 45 days to a first harvest. It's a one-planting crop, so time that single sowing well.
Planting kale in New Mexico: questions
When should I plant kale in New Mexico?+
In a typical New Mexico year, sow kale or set out transplants between Mar 13 to Apr 10, keyed to the state's median last frost around Apr 20. There's also a fall window: Jul 25 to Sep 9. Your exact dates shift with your ZIP code and microclimate.
When do I start kale seeds indoors in New Mexico?+
Start seeds inside about 6 weeks before set-out: roughly Jan 30 to Feb 27 for a typical New Mexico season.
What USDA zone is New Mexico?+
New Mexico spans zones 6a–8a, mostly zone 7. But frost dates, not zones, set planting time. The free planner uses your ZIP code's actual frost dates.
How many kale plants do I need?+
Depends who you're feeding. The crop page has exact counts per household size, or the free planner does the math for your family in about 60 seconds.