Interior Plains and Piedmonts with Grasslands and Xeric Shrub (Planicies y piedemontes interiores con pastizal y matorral xerilo) is a relatively small ecoregion of lacustrine valleys in central Mexico, ranging from 1,400 to 2,600 masl, that has been heavily transformed for agricultural and urban use but remains Mexico's most important region economically, ecologically, and politically.
Zone
Prairie
Common Name
Interior Plains and Piedmonts with Grasslands and Xeric Shrub
CEC Level III Code
13.4.1
CEC Level II Code
13.4 Temperate Sierras
Overview
Region facts
| Category | Details |
|---|---|
| Aliases | Interior Plains and Piedmonts with Grasslands and Xeric Shrub, Interior Plains & Piedmonts, Grasslands and xeric shrublands |
| Geographic Range | This is a relatively small, densely inhabited ecoregion in central Mexico, which serves as the country’s political, business, industrial, and commercial center, and is an area of major agricultural and livestock production, encompassing most of Mexico City. |
| Climate Snapshot | The predominant climate in this region is warm in the Bajío area and semi-dry and temperate in the central highlands, where it is influenced by elevation and the orographic shadow from the Transverse Neovolcanic Belt. |
| Terrain Profile | This region consists of a series of lacustrine valleys, including the Bajío region, Lerma Highland, and Mexican central highlands, with elevations ranging from 1,400 to 2,600 meters above sea level. |
| Vegetation Cover | The subregion is now 70 percent agricultural land, with natural vegetation conserved in only 18 percent and consisting mainly of induced grasslands, halophytic grasslands, desert rosette scrub, crasicaul scrub, oak thickets, tropical deciduous forest, low shrubs, and aquatic vegetation, along with small relicts of pin pine, juniper, and mesquite forests. |
| Wildlife Habitat | Despite habitat destruction, this subregion is ecologically important for migratory and resident birds, featuring endemic species like the Mexican axolotl, various fish (e.g., popoche chub, twoline skiffia), amphibians (e.g., Montezuma leopard frog), and birds (e.g., collared towhee). |
Eco snapshot
The subregion is now 70 percent agricultural land, with natural vegetation conserved in only 18 percent and consisting mainly of induced grasslands, halophytic grasslands, desert rosette scrub, crasicaul scrub, oak thickets, tropical deciduous forest, low shrubs, and aquatic vegetation, along with small relicts of pin pine, juniper, and mesquite forests.
Despite habitat destruction, this subregion is ecologically important for migratory and resident birds, featuring endemic species like the Mexican axolotl, various fish (e.g., popoche chub, twoline skiffia), amphibians (e.g., Montezuma leopard frog), and birds (e.g., collared towhee).
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 shelter as insects “wake up” | Plant/maintain early-blooming natives; leave some leaf litter and stems until warmer weather is steady |
| Spring | Steady bloom; nesting sites (especially for solitary bees) | Add a cluster of spring flowers; keep some bare, well-drained soil; avoid disturbing nesting areas |
| Summer | Reliable nectar during heat/dry spells; water access | Plant heat- and drought-tolerant bloomers; provide a shallow water dish with stones; water plants deeply but not daily |
| Late summer/fall | “Finish-line” nectar/pollen to build reserves; seeds and shelter | Plant late bloomers; avoid cutting everything back; let some plants go to seed |
| Winter or Dry Season | Protected overwintering habitat | Leave stems, seed heads, and a small brush/leaf pile; plan next season’s bloom sequence |
Keystone plants
Mix early, mid, and late bloomers so pollinators always find food.
Seed mix concept
Spring starter: early bloomers that help pollinators find food soon after they emerge.
Summer bridge: heat-tough flowers that keep nectar/pollen available through dry spells.
Fall finisher: late bloomers (often asters/goldenrods in many regions) that provide crucial end-of-season fuel.
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.
Blackberries and raspberries (genus Rubus) are flowering bramble shrubs that can feed pollinators in bloom and people later with tasty berries—great for yards, school gardens, and even large containers with support.
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.
Blueberries and huckleberries (genus Vaccinium) are berry-producing shrubs with spring flowers that can support pollinators and later feed people and wildlife—great for gardens, schoolyards, and even large containers.
Coneflowers (Echinacea) are tough, long-blooming wildflowers that bring steady color and reliable nectar and pollen to gardens, schoolyards, and even large containers.
Currants and gooseberries are Ribes shrubs that offer early-season flowers for pollinators and later berries for people and wildlife. They’re a great choice for edible landscapes, mixed borders, and small yards where you want a plant that does more than one job.
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.
Joe-Pye weeds are tall, late-season native wildflowers in the genus Eutrochium that bring big, fluffy flower clusters to gardens and give pollinators a reliable place to feed when many other plants are winding down.
Maples are familiar shade trees that offer early-season flowers and later seeds, supporting a range of pollinators and adding strong structure to yards, school grounds, and streetscapes.
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.
Oaks are long-lived trees that can anchor a yard, school ground, or park with shade, structure, and lots of seasonal interest. Many pollinators use oak flowers in spring, and the tree’s leaves and bark support a wide web of life over time.
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.
Rushes are tough, grass-like wetland plants (genus Juncus) that thrive in damp soil and help create calm, sheltered habitat at the edges of ponds, rain gardens, and low spots.
Sedges (genus Carex) are grass-like plants that form tidy clumps and thrive in many garden conditions, especially where soil stays a bit damp. They add texture, cover bare ground, and can support small wildlife by providing shelter and nesting material.
Serviceberries (genus Amelanchier) are small trees with early-season blossoms, edible berries, and strong wildlife value—an easy way to add beauty and pollinator support to a yard, school garden, or even a large container.
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.
Willows are fast-growing trees and shrubs in the genus Salix that offer some of the earliest pollen and nectar of the year, making them a strong choice for pollinator-friendly yards, parks, and school grounds.
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.
