Nebraska · zones 4b–5b
When to plant lettuce in Nebraska.
Sow between Mar 21 to May 5 in a typical year, keyed to Nebraska's median last frost around Apr 28. A second, fall sowing fits Jul 23 to Sep 21. Dates below are state medians; your ZIP code shifts them by days to weeks.
The 2026 windows
Lettuce dates for a typical Nebraska season.
Direct sow
Mar 21 to May 5
Keyed to the ~Apr 28 last frost. Sow 0.25" deep, 6" apart.
Fall round
Jul 23 to Sep 21
Counted back from the ~Oct 6 first frost.
Harvest
~45 days later
~0.4 lb per plant over ~1 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
Leaf lettuce fits more separate plantings into a Nebraska season than anything else in the garden, and that density is what makes a lost round here a minor setback instead of a real loss.
The Densest Succession in the Nebraska Garden
A hailstorm or a hard, scorching wind that flattens a short row here costs two weeks, not the season, because another sowing is usually already up a few feet away or ready to go into the ground the same afternoon. Leaf lettuce needs only about 45 days from seed to a full cutting, and against a season stretching close to 161 days, that is room for something no other crop in a Nebraska garden gets: as many as a dozen separate sowings in a single year rather than one or two, a density that works here less as a luxury than as a hedge.
The rhythm splits into two runs rather than one steady stream. Spring sowings come fast and close together while the ground is still cool and workable, then the pace breaks off through the hottest stretch of summer, when seed dropped into baked, sun-warmed ground either sits without coming up or germinates only to bolt within days instead of filling out into a cuttable head. Sowings pick back up as the weather cools toward fall, and those later rounds are usually the ones a Nebraska garden depends on most, filling out steadily in easing heat instead of racing to finish before it arrives.
Reading the Bolt Before It Ruins the Bowl
Bolting is the plant switching from making leaves to making seed, and once it starts, the leaves already on the plant change with it. The visible sign comes first: a thick central stem pushes up from the middle of the rosette, taller and more upright than the leafy growth around it, well before any flower opens. Once that stem is climbing, the clock is already running on the leaves' quality, not just their supply.
The test that matters most happens in the mouth, not the eye. Pull a leaf from a plant that has just started to bolt and taste it against a leaf from one that has not: the bolting plant's leaves turn noticeably more bitter as the plant pours its energy into that central stem, and no amount of watering reverses it once it has started. A spring sowing pushed even a little late toward the hot stretch is the one most likely to reach the table already past that point; a fall sowing, maturing into cooling weather instead of building heat, is the one that most reliably gets cut while it is still sweet and tender.
Slugs, Cutworms, and a Mildew That Needs Wet Leaves
Slugs and snails favor exactly what a lettuce bed offers: low, tender leaves and damp soil underneath them. They feed at night, leaving ragged holes without the clean edges a beetle leaves, and the giveaway left behind is a dried, silvery slime trail across the soil or the leaf itself, visible hours after the animal has moved on. Cutworms work differently and earlier, severing a young seedling clean at the soil line overnight so a full stretch of tiny plants is just gone by morning; ring the stem itself, not the whole transplant, with a paper collar sunk an inch deep, and the worm never reaches bare tissue at ground level.
Downy mildew shows as a faint yellow patch on the upper leaf, matched by a gray-purple fuzz underneath that only appears on a damp morning. It needs standing water on the leaf, so it hits harder in Nebraska's humid east than out toward the drier, semi-arid panhandle, where leaves dry too fast for the spores to take hold. Pulling infected leaves and widening the spacing on the next sowing beats any spray applied after the fact. Aphids are the other leaf pest to watch, gathering on the undersides of the youngest leaves near the rosette's center; a faint stickiness on the foliage just below that cluster gives them away before the insects themselves are easy to spot.
In Nebraska: watch for
The pests that find lettuce here.
A middle-length season, about 161 frost-free days, means lettuce, leaf overlaps aphids for a stretch each summer. Check plants every week or two and treat early.
Clusters tucked into the heart of the head.
Organic fix: Rinse well; insecticidal soap on young plants.
Ragged holes and slime trails, worse after rain.
Organic fix: Iron-phosphate bait; a diatomaceous-earth ring; hand-pick at night.
Seedlings clipped off at the soil line overnight.
Organic fix: Collars around the stems; Bt or diatomaceous earth.
Pale yellow patches boxed in by the leaf veins, with white fuzz underneath.
Organic fix: Give plants room, let them dry between waterings, clear old leaves, and pick resistant varieties.
Your season math: Nebraska gives lettuce about 161 frost-free days, and it needs roughly 45 days to a first harvest. That fits about 12 re-sown rounds across the season, so you can keep it coming instead of picking once.
Planting lettuce in Nebraska: questions
When should I plant lettuce in Nebraska?+
In a typical Nebraska year, sow lettuce between Mar 21 to May 5, keyed to the state's median last frost around Apr 28. There's also a fall window: Jul 23 to Sep 21. Your exact dates shift with your ZIP code and microclimate.
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 lettuce 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.