Nebraska Nature Guide: May 2026
May is the green peak of spring in Nebraska. The last songbird migrants pour through the river woodlands, grassland birds settle onto the prairie to nest, the Sandhills and mixedgrass prairie burst into early-summer bloom, and the frost-free date finally arrives for warm-season planting.
What to look for this week
- Feeders are at their winter peak across Nebraska — chickadees, nuthatches, and cardinals work the seed, while bald eagles already gather at open water below the Platte dams and around Lake McConaughy.
- The Quadrantid meteor shower peaks in a short, sharp burst around January 3; watch after midnight from a dark Sandhills site such as Merritt Reservoir.
- A planning week — order seeds and favor short-season varieties that finish in the cold Sandhills and panhandle corner of the state.
- The massive bare cottonwoods along the Platte and Missouri show their winter silhouettes, the state tree's furrowed gray bark stark against the snow.
Birds This Month
May is the height of spring songbird migration and the start of the nesting season in Nebraska. The river woodlands along the Missouri and Platte fill with warblers — yellow, yellow-rumped, common yellowthroat, American redstart, and a dozen migrants — along with rose-breasted grosbeaks, indigo buntings, Baltimore and orchard orioles, scarlet tanagers, and great crested flycatchers. Ruby-throated hummingbirds arrive at feeders and gardens.
On the prairie the grassland birds settle in to breed: western meadowlarks, dickcissels, grasshopper sparrows, bobolinks, and upland sandpipers calling overhead in the Sandhills. The Rainwater Basin and reservoirs still hold late shorebirds on the mudflats — sandpipers, plovers, and the elegant American avocet. In the panhandle, look for lark buntings, mountain bluebirds, and Bullock's orioles on the western grasslands and pine country.
This month's tip: bird a riverside woodland in the first two weeks for the warbler peak, then walk a Sandhills prairie for the full grassland-bird chorus as nesting begins.
What's Blooming
May opens the early-summer prairie bloom across Nebraska. On the mixedgrass and Sandhills prairie, white spires of prairie larkspur rise, golden Alexanders and prairie ragwort glow yellow, blue-eyed grass and spiderwort open in the mornings, and the cushions of plains pricklypear swell toward bloom. The roadsides and prairie edges foam with wild plum and chokecherry finishing and New Jersey tea beginning.
In the eastern woodlands the spring ephemerals fade as the canopy closes, giving way to wild geranium, jack-in-the-pulpit, and columbine in the shade. Gardens reach a high point with peonies, irises, poppies, lilacs, and the first roses. By late May the Sandhills meadows green and bloom, and the first prairie roses and spiderwort mark the turn toward the great summer prairie show ahead.
Garden This Month
May is the big warm-season planting month in Nebraska, once the frost-free date passes — early May in the southeast, mid-to-late May across the center, and into the last week in the Sandhills and panhandle. Set out hardened tomatoes, peppers, eggplant, and squash transplants, and direct-sow beans, sweet corn, cucumbers, melons, and pumpkins into warm soil. Keep a few row covers within reach, because a freak late-May cold snap can still nip tender plants in the higher, western parts of the state.
The cool-season crops are producing now — harvest asparagus, radishes, lettuce, spinach, and the first green onions, and sow successions of beans and greens for a staggered harvest. Mulch the warm-season beds to hold soil moisture against the building heat and Nebraska wind, stake and cage tomatoes before they sprawl, and stay ahead of weeds. Plant out summer annuals and dahlias, and water new transplants well as the dry, windy stretch of early summer sets in.
Zone 4b (Sandhills and panhandle): the last frost finally clears in the second half of May here — wait for it, then set out tomatoes, peppers, and squash and direct-sow beans, sweet corn, and melons; the short, intense northern summer rewards prompt planting once warmth holds.
Zone 5a (central Nebraska): after the mid-May frost-free date, plant out tomatoes, peppers, eggplant, and squash, and direct-sow beans, corn, cucumbers, and melons; keep cool-season successions going and mulch as the heat begins.
Zone 5b (southeast, lower Missouri Valley): the warmest tier is in full warm-season planting — set out all the tender crops early in the month, direct-sow beans, corn, okra, and melons, and harvest the first asparagus, lettuce, and radishes.
What's at the Farmers Market
May fills Nebraska's farmers markets with spring's full range. Asparagus is at its peak and abundant, joined by rhubarb, plentiful spinach, lettuce, arugula, radishes, green onions, and salad turnips, and the first strawberries in the warm southeast by the end of the month. Bunched cooking greens, fresh herbs, and the season's first baby carrots and beets come on.
The stands also overflow with vegetable and flower starts, hanging baskets, and bedding plants for the home garden, alongside honey, farm eggs, and grass-fed Sandhills beef and pork. Look for the first cut flowers — peonies, irises, and tulips — and for morels from the timber. Buy asparagus and greens as fresh as possible and refrigerate them promptly; pick up strawberries fully ripe, since they won't sweeten further, and use them within a day or two.
Night Sky This Month
May's mild, comfortable nights make for easy stargazing under Nebraska's dark skies, with the spring constellations high and the summer Milky Way beginning to rise late. The darkest skies are the Sandhills around Valentine and Merritt Reservoir, the Niobrara valley, and the panhandle's Wildcat Hills, far from any city glow.
Overhead, the Big Dipper rides near the zenith; follow its handle's arc to orange Arcturus in Boötes, then on to blue-white Spica in Virgo. The keystone of Hercules climbs in the east, carrying the fine Great Globular Cluster (M13), and the Coma and Virgo galaxy fields ride high for telescopes. Late in the night, the Summer Triangle of Vega, Deneb, and Altair rises in the east, and the first arm of the summer Milky Way begins to lift over the Sandhills horizon.
This year's exact planet positions vary — the printable Nebraska night-sky guide gives the current month's details for your location.
Butterflies & Pollinators
May brings a strong flush of butterflies to Nebraska's prairies, gardens, and river woodlands. Black and eastern tiger swallowtails are flying well, joined by the large giant swallowtail in the southeast and the early summer broods of cabbage whites, orange and clouded sulphurs, and spring azures. Pearl crescents are abundant in the grasslands, and the first red admirals, painted ladies, and American ladies work the blooming prairie and gardens.
The returning monarchs are now breeding across the state, their caterpillars feeding on common, butterfly, and showy milkweed in prairie, ditch, and garden. Skippers begin to appear in numbers — silver-spotted, least, and a range of grass skippers darting low through the grass. May is a fine month to walk a prairie or a milkweed-rich roadside in the afternoon and watch the season build toward its June and July peak. Leaving milkweed and native nectar plants undisturbed now supports the monarch broods that will carry through the summer.
Trees This Month
By May, Nebraska's trees are in full, fresh leaf. The bottomland forest along the Platte and Missouri is dense and green — cottonwoods, silver maples, green ashes, hackberries, and boxelders all leafed out — and the eastern cottonwoods begin to ripen the seed capsules that will release their drifting cotton in June. The black walnuts and bur oaks, last to wake, finish leafing out, the oaks dangling pollen catkins.
The understory flowers: black locust hangs fragrant white clusters, catalpa prepares its showy blooms, and the American plum and chokecherry set their small green fruit. In the panhandle the ponderosa pines of the Pine Ridge and Wildcat Hills release their yellow pollen. This remains a good month to plant balled-and-burlapped and container trees and to water young plantings well, as the warm, dry, windy stretch of early summer arrives and new trees draw heavily on soil moisture.
Go deeper with the Nebraska guides
The complete Nebraska birding, native-plant, wildflower, and night-sky guides — or the whole year in one bundle.
Same month elsewhere: May in Nevada · May in New Hampshire · May in New Jersey