Bring your Colorado garden to life with brilliant blooms that feed migrating monarchs. From goldenrods to blazing stars and milkweeds, these native nectar plants keep butterflies fluttering all season.
Colorado sits at a crossroads for monarchs. Our mountains, foothills, high plains, and canyon country all fall into different monarch nectar regions, which means you have a huge menu of excellent native flowers to choose from. The trick is simple: match plants to your part of the state, stack blooms from spring through fall, skip pesticides, and let your garden run a little wild in the best possible way.
Colorado overlaps four monarch nectar regions: Northern Plains, Rocky Mountains, Southern Plains, and Southwest. Below is a friendly walk through each region, organized so you can pick what fits your corner of the state. Think of it as a choose your own nectar adventure: eastern prairie, foothill townhome, mountain meadow, or desert canyon getaway.
| Genus | Asclepias |
|---|---|
| Native Plants | Colorado, Rocky Mountains, United States |
| Attracts | Birds, Butterflies, Hummingbirds |
Along the Front Range and into the high valleys, use this list to mix meadow style perennials with tough shrubs. Focus on sunny spots and staggered bloom from July into fall when monarchs wander through.
For lower elevation, hot, open landscapes (think southeast Colorado and similar climates), layer in Southern Plains selections. Many also blend well into prairie style plantings on the Front Range.
For gardens in southwest Colorado, canyon country, or very dry, warm Western Slope sites, lean on the Southwest set. These plants are built for lean soils, sun, and big temperature swings.
To truly boost monarchs in Colorado, pair multiple native milkweeds (butterfly, showy, swamp, whorled, spider where suitable) with a dense, overlapping mix of nectar plants from the lists above. Plant in sweeps, water deeply until established, then taper off. Avoid insecticides, ask nurseries about neonic free stock, and let seed heads stand into winter so birds and beneficial insects can share the wealth.
Do this, and your Colorado landscape becomes more than pretty. It becomes a dependable fueling station stitched into the larger migration route, one patch of orange wings at a time.
Monarchs are most visible during their migration seasons.
In spring and early summer (around mid-May onward), you’ll see them moving north through the plains and foothills.
In fall (September into early October), they return south, refueling on native flowers before continuing toward their winter homes.
You can spot them in open fields, meadows, gardens, or anywhere milkweed and nectar plants are available.
Usually one to three generations occur each season.
In spring, adults arrive and lay eggs on emerging milkweed. Their caterpillars grow, pupate, and emerge as summer butterflies.
Later generations breed through the warm months, and the final brood becomes the migrating generation, traveling hundreds of miles south.
Milkweed is the only plant monarch caterpillars can eat. Females lay eggs exclusively on milkweed leaves, which serve as both nursery and food source for their young.
Without milkweed, monarch populations cannot survive. Native species are best adapted to Colorado’s climate and safer for local ecosystems.
Monarchs face several major challenges:
Habitat loss from development and intensive land use.
Pesticides and herbicides, which kill both butterflies and the plants they depend on.
Climate change and severe weather, disrupting migration and breeding cycles.
Declining overwinter populations, reducing the number of migrants reaching Colorado each year.
Absolutely! You can make a difference by:
Planting native milkweeds and nectar-rich flowers that bloom from spring through fall.
Avoiding pesticides and leaving some wild patches or seed heads over winter.
Providing shallow water dishes with pebbles for safe drinking.
Joining citizen science programs that track monarch sightings, eggs, or caterpillars.
Even a small garden can become a vital rest stop for migrating monarchs.
Colorado sits at a natural crossroad between the eastern and western monarch populations.
In spring, butterflies head north from their overwintering grounds. In late summer and fall, the final generation migrates south, using Colorado’s open landscapes as a refueling stop.
Migration is multi-generational — no single butterfly completes the full round trip.
Monarchs are native to North America, and Colorado is part of their breeding and migration range. They’re not here year-round, but they use Colorado as both a breeding ground and a migration corridor.
No. Colorado’s winters are too cold for monarchs to survive outdoors.
Instead, they migrate to warmer areas — central Mexico for eastern monarchs, and coastal California for western monarchs.
Colorado’s role is as a summer home and migration pit stop.
Eastern monarchs migrate to central Mexico for winter.
Western monarchs migrate to California’s coast.
Colorado sits on the dividing line between the two populations, so both can pass through or breed here depending on conditions.
Your garden can support both migration routes!
Summer generations live about 2–5 weeks, long enough to breed and lay eggs.
The final, migratory generation can live up to 8–9 months, surviving through winter before reproducing the following spring.
Updated: November 2025 • Reviewed by Gardenia Editors
Tara Schmidt, Flickr
| Genus | Asclepias |
|---|---|
| Native Plants | Colorado, Rocky Mountains, United States |
| Attracts | Birds, Butterflies, Hummingbirds |
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Create a membership account to save your garden designs and to view them on any device.
Becoming a contributing member of Gardenia is easy and can be done in just a few minutes. If you provide us with your name, email address and the payment of a modest $25 annual membership fee, you will become a full member, enabling you to design and save up to 25 of your garden design ideas.
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