Central Irregular Plains is an ecoregion spanning southern Iowa, northern and western Missouri, eastern Kansas, and northeastern Oklahoma, characterized by rolling and irregular plains, a grassland/forest mosaic, and a mix of agricultural and industrial land uses.
Zone
Prairie
Common Name
Central Irregular Plains
CEC Level III Code
9.2.4
CEC Level II Code
9.2 Temperate Prairies
Overview
Region facts
| Category | Details |
|---|---|
| Aliases | Central Irregular Plains, CEC 9.2.4, Central Irregular Plains ecoregion |
| Geographic Range | The Central Irregular Plains ecoregion spans southern Iowa, northern and western Missouri, eastern Kansas, and northeastern Oklahoma. |
| Climate Snapshot | The Central Irregular Plains has a severe, mid-latitude, humid continental climate in the north and a milder humid subtropical climate to the south, characterized by hot summers, mild to cold winters, and mean annual precipitation of about 983 mm. |
| Terrain Profile | The terrain is characterized by rolling and irregular plains, featuring some cuestas and low hills. |
| Vegetation Cover | The historical vegetation of the Central Irregular Plains is a grassland/forest mosaic, featuring an allgrass prairie with little bluestem, big bluestem, switchgrass, and Indiangrass, and oak-hickory woodlands with various species of oak and hickory along streams. |
| Wildlife Habitat | White-tailed deer, badger, raccoon, skunk, muskrat, cottontail rabbit, mink, Canada geese, bobwhite quail, western meadowlark, and ring-neck pheasant characterize the diverse fauna of this ecoregion. |
Eco snapshot
The historical vegetation of the Central Irregular Plains is a grassland/forest mosaic, featuring an allgrass prairie with little bluestem, big bluestem, switchgrass, and Indiangrass, and oak-hickory woodlands with various species of oak and hickory along streams.
White-tailed deer, badger, raccoon, skunk, muskrat, cottontail rabbit, mink, Canada geese, bobwhite quail, western meadowlark, and ring-neck pheasant characterize the diverse fauna of this ecoregion.
Seasonal timing
Yearly needs
What pollinators need throughout the year, and what to do about it.
| Season | What pollinators need most | What you can do |
|---|---|---|
| Late winter/early spring | Early nectar/pollen; safe places to emerge | Plan for early blooms; leave last year’s stems/leaves a bit longer; prep a small bare-soil nesting spot |
| Spring | Steady food; nesting materials and sites | Plant early-blooming natives; provide shallow water; avoid mowing flowering patches |
| Summer | Continuous bloom; heat/drought support | Add mid-season flowers; water new plantings during dry spells; include some windbreak/shelter |
| Late summer/fall | High-energy nectar; late pollen; overwintering prep | Plant late bloomers; stop deadheading everything; leave seedheads and stems standing |
| Winter or Dry Season | Shelter and undisturbed habitat | Don’t “clean up” completely; keep leaf litter in corners; plan next year’s bloom gaps to fill |
Seed mix concept
Spring starter: early bloomers that help the first emerging bees.
Summer bridge: reliable mid-season flowers that carry pollinators through the busiest months.
Fall finisher: asters/goldenrods and other late bloomers that fuel end-of-season nesting and migration.
What You Can Do
Turn this knowledge into action. Whether you plant a single pot or a whole garden, you are building a vital bridge for local biodiversity.
Join the movement to restore our shared habitats.
Native plants
Asters are late-season wildflowers that bring a burst of daisy-like blooms when many gardens are winding down, making them a reliable choice for pollinator-friendly planting.
Blanketflowers (Gaillardia) are bright, long-blooming wildflowers that can bring steady color and pollinator visits to sunny gardens, schoolyards, and even containers.
Blazing stars (Liatris) are upright, purple-pink wildflowers that bloom in showy spikes and are well-loved by many pollinators. They’re a strong choice for sunny gardens, borders, and meadow-style plantings.
Clovers are small, easygoing plants in the genus Trifolium that can add nectar and pollen to gardens, lawns, and pots while helping cover bare soil.
Coneflowers (Echinacea) are tough, long-blooming wildflowers that bring steady color and reliable nectar and pollen to gardens, schoolyards, and even large containers.
Coreopsis (often called tickseed) is a cheerful, long-blooming group of wildflowers that can brighten gardens and containers while offering easy-to-find nectar and pollen for many pollinators.
Goldenrods are tough, sunny wildflowers in the genus Solidago that light up late-season gardens with golden blooms and provide reliable nectar and pollen when many other flowers are fading.
Ironweeds are tall, purple-blooming wildflowers in the genus Vernonia that bring late-season color and steady nectar to pollinator gardens.
Milkweeds are tough, nectar-rich wildflowers in the genus Asclepias that can turn a garden bed, schoolyard edge, or even a sunny pot into a pollinator stop.
Mountain mints are tough, fragrant native wildflowers that bloom in summer and are famous for drawing in a busy mix of pollinators. They’re easy to grow, handle a range of garden conditions, and make a great “plant it and watch it” choice for pollinator patches.
Prairie clovers (genus Dalea) are prairie wildflowers with tidy, clover-like leaves and bottlebrush-style blooms that are popular with many pollinators. They’re a great choice for sunny, well-drained spots where you want long-lasting summer color without fussy care.
Prairie coneflowers (Ratibida) are tough, sunny wildflowers with drooping petals and a bold cone-shaped center that pollinators can easily find. They’re a great choice for low-fuss gardens, schoolyards, and naturalized patches where you want long-lasting summer color.
Native sunflowers are bright, tough wildflowers in the genus Helianthus that feed pollinators and add cheerful color from mid-season into fall.
Wild bergamot and other bee balms (the genus Monarda) are easygoing native wildflowers known for their shaggy, pom‑pom blooms that draw in lots of pollinators. They’re a great choice when you want long-lasting summer color and a plant that feels lively with buzzing visitors.
Wild indigos (genus Baptisia) are long-lived native wildflowers known for upright flower spikes, clover-like leaves, and a tough, low-fuss nature once established. They’re a strong choice for pollinator-friendly gardens where you want reliable blooms and a plant that can hold its own without constant care.
Silphium (often called rosinweed) is a group of tall, tough native wildflowers known for sunflower-like blooms and long-lasting nectar and pollen. They’re a strong choice for pollinator gardens, schoolyards, and naturalized edges where you want big plants that can handle summer heat once established.
Pollinators
Adults visit flowers for nectar and can move pollen between blooms; their presence is a sign of diverse, functioning habitats.
Many brushfoots move pollen between flowers as they feed, and their caterpillars are part of healthy food webs.
Bumble bees are important pollinators of many wildflowers and garden plants, helping ecosystems and food crops reproduce.
Adults visit flowers for nectar and pollen, and many species’ larvae help keep plant-eating pests in check.
They can move pollen between flowers while feeding on nectar, especially for blooms that open or scent up in the evening.
They move pollen between flowers while foraging, helping many wild plants and garden plants set seed and fruit.
They move pollen between flowers while foraging, helping many wild plants and garden crops set seed and fruit.
They move pollen between flowers while foraging, helping many wild plants and garden plants set seed and fruit.
They can move pollen while drinking nectar, and they also help control many plant-eating insects.
They’re part of healthy food webs and plant communities, and their caterpillars depend on a wide range of native trees and shrubs.
Skippers visit many flowers for nectar and can help move pollen between blooms while they feed.
Many small moths move pollen while feeding on nectar, supporting wild plants and garden blooms—especially in the evening and at night.
Many adults visit flowers and can move pollen between blooms, while also helping control some garden pests.
Adult swallowtails visit many flowers for nectar and can help move pollen between blooms as they feed.
They help move pollen between flowers in gardens, parks, and natural areas, supporting seed and fruit production.
They visit a wide range of flowers for nectar and can help move pollen between blooms as they feed.
