Asclepias syriaca Seeds

Common Milkweed Seeds

This gorgeous plant produces purple/pink flower clusters that wildflower gardeners love and spreads quickly. Common Milkweed is one of the Monarch Butterflies’ favorite plants and will bring many winged friends to your garden or meadow. Perennial.
Zones3 - 8
Advantages
Native
Light Requirements
Full Sun
Mature Plant Size18-32" tall
Bloom TimeSummer
ShippingMost orders ship within 48 hours. Learn More…
SizePacket
SKUHC013310

USDA Hardiness Planting Zones

To determine if a plant is sufficiently cold hardy, the USDA created numbered zones indicating winter low temperatures; the lower the zone number the colder the winter.

  • If the coldest winter temperature expected in your area is -15°F (zone 5) then any plants rated zones 3-5 will survive the winter temperatures in your area.
  • If you live in very warm winter areas (zones 9-11) plants with zones 3-4 ratings are not recommended. The lack of freezing winter temperatures do not provide a time for winter dormancy (rest).

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SKU
HC013310

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Milkweed is a handsome, straight plant you see in every farm field and growing wherever a roadside hasn't been mowed. Leaves are glossy and thick, and the blooms are large, rounded clusters of purplish/pink flowers atop plants that range from 2 to 5 ft. It's native in the US from Canada to Georgia, and west to Texas.

The botanical name, "Asclepias" is after Aesclepios, the Greek God of medicine, since this plant has been used as a medicinal since ancient times. "Milkweed" derives from the fact that when you break a stem, sticky white sap immediately appears. Common Milkweed is one of our commonest "weeds," but one almost all wildflower gardeners want.

This is the plant famous for its "silky seeds" in fall, when you see the drying cone-shaped seedpods crack open and their snow-white shiny fluff flying around the meadow. This is the dispersal mechanism for the large shiny seeds of common milkweed. Every kid loves to blow them away in fall, like dandelion seeds in spring. Milkweed seeds require special prep when planting. See our planting guide below.

You'll love Milkweed in your wildflower garden...for two reasons. It's beautiful and dependably perennial, and it's the No. 1 plant visited by Monarch butterflies on their famous migration south every summer and fall. In fact, during late summer, it's somewhat rare to see a milkweed plant without a monarch perched upon the flowers, making it the No. 1 butterfly magnet among our wildflowers. ("Butterfly Weed" is a close relative, with bright orange flowers.) Asclepias syriaca Native Range: AL, AR, CT, DC, DE, GA, IA, IL, IN, KS, KY, LA, MA, MD, ME, MI, MN, MO, MS, MT, NC, ND, NE, NH, NJ, NY, OH, OK, OR, PA, RI, SC, SD, TN, TX, VA, VT, WI, WV.

More Information
SKUHC013310
Common Name
Common Milkweed Seeds
Botanical Name
Asclepias syriaca
Item Package Size
Packet
Light Requirements
Full Sun
Flower Color
Pink
Bloom Time
Summer
Mature Height
18-32" tall
Wildflower Mix or Specie
Species
Ships As
Seed
Ideal Region
West
Zones
3, 4, 5, 6, 7, 8
Seeds Per Pound
64000
Seeds Per Packet
45
Advantages
Native
Ships To Canada
Yes
Planting Guides

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:

    1. Need sandy or gravelly soils (except the Clay form which does well in heavier soils including dry clay.)
    2. Does best with gravel mulches.
    3. After their second growing season, only requires deep but infrequent watering. Plant in full hot sun.
    4. 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.

    Special comments:

    • 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 taproot 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:

    1. These species grow in a wide range of soil types, including clay.
    2. They don't need mulching (except in very hot climates).
    3. These are moisture-loving perennials and do well in wet to moderately moist soil conditions.
    4. Plant in full to part sun areas.
    5. They like compost enriched soils at planting time.

    Special comments:

    • 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.

Garden care:

  1. Fertilize Asclepias just once in fall with Yum Yum Mix and Planters II. - Naturalized plantings don't need additional fertilization.
  2. 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.
  3. 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.
Shipping
Most orders ship within 48 hours.

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