Asclepias incarnata 'Soulmate' (Swamp Milkweed) lights up the mid-to-late summer garden with clusters of pink petals surrounding a white heart. This native star attracts and nourishes hummingbirds, butterflies, bees, and pollinators of many shapes and sizes – especially Monarch butterflies. With a sweet vanilla scent, it’s deer and rabbit resistant. This easy-care plant brings as much pleasure to the gardener as it does to the pollinators in sunny borders and meadows with average-to-moist soil.
Asclepias incarnata 'Soulmate' (Swamp Milkweed) has cheery bright pink flowers and upright stems with long green leaves. It stands at 3-4' tall and is a worthy addition to a sunny border or meadow garden, where this easy-care perennial can provide sweetly scented flowers from mid-to-late summer. Swamp milkweed likes moisture and will tolerate clay soil as well. With a broad native range, Asclepias is a very important plant for the monarch butterfly – it is the host plant essential for the survival of monarch caterpillars, and an important nectar source for mature monarch butterflies. Consider planting several species such as Asclepias tuberosa, A. syriaca, and A. purpurascens to provide plenty of variety for monarchs and non-stop garden color from June to September.
Item Package Size
Plant - 5" Deep Pot
'Soulmate' Swamp Milkweed
Asclepias incarnata 'Soulmate'
3, 4, 5, 6, 7, 8, 9
Full Sun, Morning Sun & Afternoon Shade
Mid to late summer
Average Soil, Sandy Soil, Compost Enriched Garden Loam Soil
Average, Moist / Wet
Bee Friendly, Attract Butterflies, Deer Resistant, Great For Mass Plantings, Multiplies / Naturalizes, Low Maintenance, Fragrant Flower / Foliage, Rabbit Resistant
Asclepias (Milkweed) are sun loving plants that are essential perennials for monarch butterflies providing food for caterpillars and nectar for adult butterflies. They bloom from mid-summer into early fall and, with their milky sap, are resistant to rabbits and deer.
Asclepias can be divided into two groups for plant care; Asclepias tuberosa with orange (sometimes yellow) flowers and all the other species with pink (sometimes white) flowers.
Asclepias tuberosa (Orange Butterfly Weed) - this perennial stays dormant until later in the spring than many other plants, especially when grown in pots. It's fine to plant dormant plants; don't up-pot them for planting later in the growing season.
Preferred growing conditions:
Need sandy or gravelly soils (except the Clay form which does well in heavier soils including dry clay.)
Does best with gravel mulches.
After their second growing season, only requires deep but infrequent watering. Plant in full hot sun.
Just a few handfuls of compost and Yum Yum Mix added to the planting hole is enough. Don't plant into a rich, highly-amended soil.
When planting dormant plants, water thoroughly after planting and wait to water again until the plant comes into active growth, at which time a deep watering every week or so is adequate. Take care not to overwater young transplants.
Asclepias has a long, carrot-like tap root that should remain undisturbed after planting and should NOT ever be divided.
Most Asclepias species are late to wake up in the spring, and will often be shipped as dormant plants. Don't despair if your milkweed is asleep. The white roots and woody crown are alive just waiting for consistently warm weather to wake up and begin to grow.these perennial species stay dormant later in the spring than many other plants, especially when they are grown in pots. It's fine to plant dormant plants; don't up-pot them for planting later in the growing season.
Preferred growing conditions:
These species grow in a wide range of soil types, including clay.
They don't need mulching (except in very hot climates).
These are moisture-loving perennials and do well in wet to moderately moist soil conditions.
Plant in full to part sun areas.
They like compost enriched soils at planting time.
Asclepias syriaca and A. speciosa will spread to make big patches of plants and are best planted in parts of the landscape where they won't crowd out less vigorous plants. Not recommended for the prime spots in your perennial beds.
Asclepias incarnata (Swamp Milkweed) is a more refined grower and is fine to include in perennial beds.
Oftentimes, Milkweeds won't grow much their first season in the ground, so be patient. They are establishing their root system and crown. By the second growing season, the plants will begin to get bigger and look more robust. Asclepias species are an odd bunch and don't behave like many other more familiar perennials. So be patient and accept their quirky nature.
Fertilize Asclepias just once in fall with Yum Yum Mix and Planters II. - Naturalized plantings don't need additional fertilization.
To encourage re-seeding and provide winter interest with their ornamental seed pods, leave the stems intact over the winter. In mid-spring, remove old stems just above ground level.
All species of Asclepias are late to emerge in the spring, so don't be concerned if other perennials come up first and they remain dormant.
View more Planting Guides, or download our complete Planting Guide for tips on caring for your plants when you receive your order, as well as planting instructions for Perennials, Spring-Planted Bulbs, Fall-Planted Bulbs, Cacti & Succulents, Xeric Plants and more.
No longer available this season.
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