Native Plants That Attract Monarch Butterflies (Milkweed Alone Isn't Enough)

If you've ever tried to help monarch butterflies, you've almost certainly been told to plant milkweed. That advice is correct — but it's incomplete in a way that leaves a significant gap in monarch support, and in some cases causes real harm.

Monarchs need milkweed to breed. They also need abundant nectar from a wide range of native plants to fuel their summer activity, their breeding season, and — critically — a migration of up to 3,000 miles to overwintering sites in central Mexico.

Researchers at American Meadows describe nectar plants as "one of the most limiting factors affecting monarch populations." A yard full of milkweed but short on late-blooming nectar is like putting a gas station 100 miles from the highway.

This article covers both categories: what to plant for breeding, and what to plant for the migration that determines whether the butterflies you raised in your yard actually survive the journey south.

The numbers are stark. The eastern monarch population has declined by more than 80 percent since the 1990s, and the western population — which overwinters on the California coast — has declined by over 95 percent since the 1980s. In December 2024, the U.S. Fish and Wildlife Service proposed listing the monarch as threatened under the Endangered Species Act, citing catastrophic habitat loss across the migratory range.

The March 2025 Science study that documented a 22 percent decline in US butterfly populations overall put monarchs among the most severely affected species. The western population hit a near-30-year low in 2024.

The two primary drivers gardeners can actually address are milkweed loss and nectar plant loss. Both have accelerated with agricultural intensification, herbicide use, and the conversion of native grasslands. What individual yards can restore — in aggregate — is meaningful.

Milkweed (Asclepias spp.) is the only plant monarch caterpillars can eat. It's not one of several options — it's the only one. Without milkweed in a yard, monarchs can visit to feed but cannot breed there.

There are roughly 76 native milkweed species across North America, but only a handful are widely available from nurseries. Here's how to think about which ones to plant.

Swamp milkweed (Asclepias incarnata) is one of the two most universally recommended native milkweeds. It tolerates average to moist soil, grows 1 to 1.5 meters tall, produces pink-to-mauve flower clusters that bloom through summer, and is eagerly used by monarch caterpillars. Less aggressive than common milkweed. Works in most regions east of the Rockies.

Butterfly weed (Asclepias tuberosa) is the other top recommendation — deep orange flowers, drought-tolerant once established, compact (60 to 90 cm), and works across most of the monarch's breeding range. Caterpillars use it readily. The taproot makes it slow to establish but very long-lived once it's settled in.

Common milkweed (Asclepias syriaca) is ecologically the most important milkweed across eastern North America — it's what most of the monarch range historically relied on. It spreads by rhizome and self-seeds, which concerns formal gardeners but makes it ideal for meadows, naturalized areas, and back borders where spread is welcome. In a dedicated monarch garden with space, this is the highest-value plant you can add.

Whorled milkweed (Asclepias verticillata) is an excellent option for dry, poor soils where other milkweeds struggle — delicate white flowers, narrow leaves, low profile.

Regional alternatives worth seeking: Prairie milkweed (Asclepias sullivantii) in the Midwest; showy milkweed (Asclepias speciosa) in the West; poke milkweed (Asclepias exaltata) in woodland edges.

The key principle, recommended by the University of Georgia Botanical Garden: choose species native to your ecoregion. A milkweed native to the Southwest may not serve monarchs in the Northeast the way local species do.

Walk into any garden center and the milkweed most likely on the shelf is Asclepias curassavica — tropical milkweed, with its vivid orange-and-yellow flowers. It's attractive, it's easy to grow, and it's widely sold as a monarch plant.

It also causes real problems in frost-free regions and anywhere it doesn't die back in winter.

The issue is a protozoan parasite called Ophryocystis elektroscirrha, or OE. As Xerces Society explains, OE spores are deposited on milkweed leaves by infected adult monarchs. When caterpillars hatch and eat the plant, they ingest the spores.

In areas where native milkweeds die back naturally after frost, those spores die with the plant each season — the next year's monarchs feed on clean foliage. But tropical milkweed that stays green through winter allows OE to accumulate on the same plant across generations, exposing successive caterpillars to dangerous parasite loads. High OE levels reduce migration success, body mass, lifespan, and flight ability.

The Monarch Joint Venture recommends a precautionary approach: the risk mechanism is clear, so avoiding anything that could worsen monarch health makes sense. In climates where tropical milkweed dies back hard in frost, the risk is substantially reduced. In frost-free parts of the South and West Coast, it's a genuine problem.

The simple solution: plant native milkweeds. They're better for monarchs by every measure.

Practical advice on choosing milkweed species by region, managing spread, and growing in containers if space is limited is covered in more depth in our milkweed in pots guide.

This is where most monarch gardens fall short, and where the greatest opportunity lies for most people.

Adult monarchs drink nectar from dozens of plant species throughout their lives. They need nectar in spring and summer to fuel breeding activity. They need it urgently in fall — the super generation that will fly to Mexico must build substantial fat reserves to survive the journey and the winter. Without abundant late-season nectar along the migratory corridor, those butterflies don't make it.

Texas A&M AgriLife Extension is explicit: "while monarch butterflies rely on milkweed as a host plant for eggs and caterpillars, a variety of nectar-producing plants are needed to fuel their fall migration."

The goal is continuous bloom from late spring through hard frost, with particular emphasis on late summer and fall when the migration is underway.

Purple coneflower (Echinacea purpurea) blooms June through August, is available everywhere, tolerates most soils, and attracts monarchs, many other butterflies, and goldfinches that eat the seed heads in fall. Easy to establish from transplant and reliably perennial across most of the US.

Wild bergamot (Monarda fistulosa) and bee balm (Monarda didyma) bloom mid-summer and are heavily visited by monarchs and dozens of native bee species. Bee balm prefers moist soil; wild bergamot handles drier conditions. Both spread by rhizome — see the native plant spreading guide for management.

Mountain mint (Pycnanthemum spp.) blooms in midsummer and is arguably the highest-pollinator-density native plant per square foot available to eastern gardeners — the small white flowers attract an extraordinary variety of bees, wasps, and butterflies including monarchs. Spreads moderately by rhizome; controllable with annual root pruning.

Native clovers (Trifolium spp.), Joe-Pye weed (Eutrochium spp.), and blazing star (Liatris spp.) all provide excellent summer nectar. Liatris blooms mid-to-late summer and is a particular monarch favorite — its tall purple spikes are visible from a distance, which is how migrating monarchs find nectar sources.

These are the most underplanted monarch plants in North American gardens, and the most important ones for migration survival.

Goldenrod (Solidago spp.) may be the single most critical fall nectar plant across the monarch's eastern migratory corridor. World Wildlife Fund identifies it as a top nectar source for fall migration, with blooms that persist through October when most summer flowers have finished. Goldenrod gets wrongly blamed for hay fever (that's ragweed, which blooms at the same time but is wind-pollinated; goldenrod is insect-pollinated and doesn't become airborne).

Native goldenrods also support over 126 species of butterflies and moths. Choose species native to your region — showy goldenrod (Solidago speciosa) and stiff goldenrod (Solidago rigida) for more formal settings, Canada goldenrod for wild areas.

Native asters (Symphyotrichum spp.) bloom August through October — exactly when the migratory generation is moving south and desperately needs fuel. New England aster (Symphyotrichum novae-angliae) produces masses of purple-pink flowers visited heavily by monarchs. Aromatic aster (Symphyotrichum oblongifolium) is more compact and drought-tolerant. Heath aster (Symphyotrichum ericoides) covers itself in small white flowers from September into November. A mix of two or three aster species provides continuous late-season bloom.

Ironweed (Vernonia spp.) produces deep purple flowers in late summer and fall and is, as Ohio State University Extension notes, among the richest late-season nectar sources in its range. It's tall (1.5 to 2 meters), dramatic, and underused. The Midwest has several native species; 'Iron Butterfly' is a compact cultivar that works well in smaller gardens.

Native sunflowers (Helianthus spp.) bloom late summer into fall and provide both nectar for adult monarchs and seed for goldfinches and other birds through winter. False sunflower (Heliopsis helianthoides) is widely available and reliable. Cup plant (Silphium perfoliatum) is tall and architectural, with yellow flowers from July through September.

Boneset (Eupatorium perfoliatum) and mistflower (Conoclinium coelestinum) bloom into October and are heavily visited by migrating monarchs along the eastern corridor.

Plant in masses, not individuals. A single coneflower is easy to miss from the air. A 2-meter cluster of the same species is a beacon. American Meadows' guidance for monarch gardening is explicit: "plant several individuals of the same species in a large clump rather than spreading individual plants throughout a garden. This produces blocks of color that butterflies and other pollinators can locate in flight."

Ensure continuous bloom. Map your garden's bloom calendar and identify gaps. The most critical gap in most yards is between late summer and frost — exactly when it matters most for migration. If nothing is blooming in September and October, add asters and goldenrod.

Eliminate pesticide use completely. Systemic insecticides like neonicotinoids are absorbed into plant tissue and expressed in pollen and nectar — a monarch feeding on a treated flower can ingest lethal doses. This includes many plants sold at garden centers that are pre-treated; ask before buying. It's also best to avoid bug zappers article.

Leave stems and seed heads standing in fall. Cutting back perennials in autumn removes overwintering habitat and eliminates the seed heads that feed birds through winter. The fall garden cleanup habit is worth resisting — let goldenrod, asters, and coneflowers stand until late March at the earliest.

Create a Monarch Waystation. Monarch Watch's Waystation program certifies gardens that provide both milkweed and nectar plants, and the certification requirements serve as a useful checklist for what a complete monarch habitat looks like.

A complete monarch habitat has three things: milkweed for breeding, nectar flowers from spring through fall for adult fuel, and freedom from pesticides.

Most yards with "monarch gardens" have the milkweed covered and not much else. The host plant vs. nectar plant distinction is the single most important conceptual shift for people trying to genuinely help monarchs rather than just provide a breeding site whose offspring then can't fuel the migration.

The plants that matter most for migration — goldenrod, asters, ironweed, boneset — are also some of the most important plants for the entire fall pollinator community. Adding them benefits not just monarchs but every butterfly, native bee, and beneficial insect still flying in October. That's the logic behind building a pollinator highway that works across the full season rather than just summer.

What is the best milkweed to plant for monarchs? Swamp milkweed (Asclepias incarnata) and butterfly weed (Asclepias tuberosa) are the most widely recommended for home gardens — both are well-behaved, widely available, and used readily by monarchs. Common milkweed (Asclepias syriaca) is more ecologically impactful but spreads vigorously. Always choose species native to your region.

Should I plant tropical milkweed? Not in frost-free regions, and with caution elsewhere. In areas where it doesn't die back in winter, tropical milkweed enables dangerous buildup of the OE parasite that reduces migration success. Native milkweeds are better for monarchs by every measure.

What nectar plants do monarchs use during migration? Goldenrod, native asters, ironweed, blazing star, native sunflowers, boneset, and mistflower are among the most important fall migration nectar plants. These late-season bloomers are the fuel for the journey to Mexico.

Do monarchs only eat milkweed? Caterpillars eat only milkweed. Adult monarchs drink nectar from dozens of native flowering plants. Both are necessary — milkweed for reproduction, nectar plants for energy throughout their lives and especially during migration.

How much milkweed do I need? More is better, but even a few plants make a meaningful contribution. Monarch Watch suggests including at least a few milkweed plants alongside a diverse selection of native nectar plants that bloom from spring through fall. Mass plantings of both are more effective than scattered individual plants.

When is the best time to plant for monarchs? Native milkweeds and nectar plants can be planted in spring after last frost, or in fall for establishment before next season. Planting goldenrod and asters in spring gives them the root establishment they need to flower well their first fall, which is when they matter most.