Nebraska · zones 4b–5b
When to plant kale in Nebraska.
Sow or transplant between Mar 21 to Apr 18 in a typical year, keyed to Nebraska's median last frost around Apr 28. A second, fall sowing fits Jul 6 to Aug 21. Dates below are state medians; your ZIP code shifts them by days to weeks.
The 2026 windows
Kale dates for a typical Nebraska season.
1 · Start indoors
Feb 7 to Mar 7
About 6 weeks before set-out. Warm spot, real light.
2 · Set out
Mar 21 to Apr 18
Keyed to the ~Apr 28 last frost. Sow 0.25" deep, 16" apart.
Fall round
Jul 6 to Aug 21
Counted back from the ~Oct 6 first frost.
Harvest
~45 days later
~2 lb per plant over ~16 weeks.
Nebraska spans more than one climate: Zone 5 is the most common zone, but the state runs 4b to 5b. 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.
Nebraska growing notes
Kale is one of the few plants in a Nebraska garden that a hard frost improves instead of ends, and the difference shows up on the tongue before it shows up anywhere else.
A Crop the Frost Improves Instead of Ends
Most of what grows in a Nebraska garden is finished the moment a hard frost hits, but kale keeps standing after tomatoes, beans, and squash have all blackened and quit. A transplant set out in late summer has the whole cooling stretch of fall ahead of it, harvested leaf by leaf rather than all at once, and it is often still worth cutting from well after the season's first freeze has already ended everything planted beside it.
The change worth checking for is not a number, it is a leaf. Cut one from the plant before the season's first hard frost and again a week or two after, and taste them side by side: the leaf cut after the cold has a rounder, milder flavor than the sharper bite of the one cut before it. Spring-grown kale is racing the opposite direction. Once this state's hot, dry wind sets in, the leaves toughen and sharpen fast, and a spring planting is usually past its best eating well before a fall one even gets started.
A Wide, Generous Plant That Has to Get Established Twice
Kale is started from seed sown about a quarter inch deep, then set out as a transplant spaced a generous 16 inches apart, room the plant needs because a single one, given the roughly 45 days it takes to size up, can go on to produce around 2 pounds of leaf. That size is why kale gets grown from a transplant instead of seeded straight into the row: a plant this productive is worth the head start indoors.
The harder establishment stretch is not the spring planting, it is the fall one. A spring transplant goes into cool, slow-warming ground with the rest of the season to recover from any setback. A fall transplant goes into the hottest, driest stretch of a Nebraska summer, set into baked soil and dry wind right when it has the least root system to draw water with. A new fall transplant needs watering-in checked daily rather than every few days, until the roots catch up enough to support the leaves already growing on it.
Two Ways to Read the Same Green Worm
Cabbage worms and loopers are usually treated as one problem, but they move differently, and that difference is the fastest way to tell them apart without handling either one. An imported cabbageworm crawls in a smooth, even line, while a cabbage looper has no legs in the middle of its body and travels by arching its back into a loop and drawing its hind end up to its front, the same hitching gait a measuring worm uses. Both blend into kale's own green well enough that the easiest way to find either is to spot the damage first, ragged holes eaten between the leaf veins, then trace it back to the worm still sitting nearby.
Cabbage root maggot works underground and earlier in a plant's life: adult flies lay eggs at the base of a young transplant, and the larvae that hatch feed on the roots below it. A seedling that collapses at midday even though the bed underneath it is still damp is worth pulling to check, since scarred, tunneled roots explain a struggling top that otherwise looks like nothing more than a watering problem. Black rot enters through the natural pores along a leaf's edge and shows as a yellow, V-shaped patch pointing back toward a vein that has gone black inside it. Flea beetles chew small shot holes into young leaves, worse on a transplant still small and stressed than on one already established, and aphids cluster on new growth the same as they do throughout the rest of the garden.
In Nebraska: watch for
The pests that find kale here.
A middle-length season, about 161 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: Nebraska gives kale about 161 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 Nebraska: questions
When should I plant kale in Nebraska?+
In a typical Nebraska year, sow kale or set out transplants between Mar 21 to Apr 18, keyed to the state's median last frost around Apr 28. There's also a fall window: Jul 6 to Aug 21. Your exact dates shift with your ZIP code and microclimate.
When do I start kale seeds indoors in Nebraska?+
Start seeds inside about 6 weeks before set-out: roughly Feb 7 to Mar 7 for a typical Nebraska season.
What USDA zone is Nebraska?+
Nebraska spans zones 4b–5b, mostly zone 5. 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.