Milkweed Seed Bombs

$19.99 CAD
To combine multiple varieties while taking advantage of volume discounts, select only 10-packs in the desired varieties and quantities. Automatic discounts will apply when the total reaches 20, 30, 50, or 100.


Help to save monarch butterflies and pollinators by planting native milkweed. Milkweed leaves are the sole food source for monarch caterpillars, while its flowers feed several species of endangered wild pollinators with their abundant nectar.

Plant milkweed easily

In order to be planted in the spring, milkweed, like most native northern plants, must undergo a cold treatment of at least 30 days under certain conditions (temperature, moisture, etc.). Good news, we've already done that for you!

Our milkweed seed bombs are already cold stratified and wrapped in enriched potting soil, clay and compost.

This treatment mimics the winter conditions that seeds are exposed to and helps deactivate the chemical and physical barriers that prevent sprouting. These protections are a natural adaptation of milkweed seeds and other northern plants, which prevents them from germinating prematurely during a fall or winter thaw followed by a frost. Without cold stratification, germination rates can be very low (3-4%). The clay and potting soil envelope of our seed bombs will allow the seeds to germinate without being eaten by birds or rodents.

Butterfly milkweed

  • Other names: Butterfly bush, butterfly weed, Canada root, chieger flower, chiggerflower, fluxroot, Indian paintbrush, Indian posy, orange milkweed, orange root, orange Swallow-wort, pleurisy root, silky swallow-wort, tuber root, yellow milkweed, white-root, windroot, butterfly love, butterflyweed,
  • Latin names : Asclepias tuberosa
  • Type of plant: Perennial
  • Height: 20-50 inches
  • Diameter: 6-12 inches

Swamp milkweed

  • Other names: Rose milkweed, rose milkflower, pink milkweed, white indian hemp
  • Latin name : Asclepias incarnata
  • Type of plant: Perennial
  • Height: 20-50 inches
  • Diameter: 6-12 inches

Common milkweed

  • Other names: Silky milkweed, silkweed, silky swallow-wort, Virginia silkweed, North American silk plant.
  • Latin name : Asclepias syriaca
  • Type of plant: Perennial
  • Height: 20-50 inches
  • Diameter: 6-12 inches

    Showy milkweed

    • Other names: Showy butterfly weed, creek milkweed, Greek milkweed
    • Only native in British Columbia, Alberta and the western parts of Saskatchewan
    • Latin names : Asclepias speciosa
    • Type of plant: Perennial
    • Height: 20-50 inches
    • Diameter: 6-12 inches

    Tropical milkweed

    • Common names: Tropical milkweed, Mexican butterfly weed, Mexican milkweed, Scarlet milkweed, Bloodflower, Swallow-wort, Tropical Silkweed
    • Latin names : Asclepias curassavica
    • Type of plant: Annual in Canada (below zone 9)
    • Height: 20-50 inches
    • Diameter: 6-12 inches


    • 1 bomb = One 3/4" x 4" stick, splittable into 4 cells each containing seeds. This allows to cover up to 4 square feet per stick.
    • Approximately 8-12 stratified seeds per stick

    Additional information

    • Sowing: In May, June or July, drop the seed bomb on the ground and cover lightly with soil.

      1. Cold stratification is not necessary, since the seed bombs will have already undergone the cold treatment upon receipt.

      If you do not immediately plant the seed bombs upon receipt of your order, store them in the refrigerator to delay germination.

      Then follow the Milkweed Seed Bomb planting guide.

      Informations botaniques



      • Common names: Common Milkweed, Swamp Milkweed (Incarnate), Butterfly Weed (Interior), Showy Milkweed, Tall Milkweed
      • Latin names: Asclepias syriaca, Asclepias incarnata, Asclepias tuberosa, Asclepias speciosa, Asclepias exaltata
      • Plant type: Perennial
      • Height: 1.6 - 5 feet
      • Width: 6-10 inches


      • Common names: Bloodflower, Wild Ipecac, Zeb-Man-Boivin (Mrs. Boivin's Herb), Quadrille, Cotton Herb, Calypso.
      • Latin names: Asclepias curassavica
      • Plant type: Annual in Canada
      • Height: 1.6 - 3.3 feet
      • Width: 6-10 inches
      • 1 bomb = 1 3/4" x 4" stick, divisible in 4 cells each containing seeds. You can cover up to 4 square feet per seed bomb.
      • About 8 to 12 stratified seeds per stick.
      Informations supplémentaires
      • When sowing: In May, June, or July, drop the bomb on the surface and lightly cover with soil, without risk of birds or weather affecting the seeds.
      • Cold stratification not necessary, since they will have already undergone cold treatment upon receipt.

      Plantation & entretien

      Customer Reviews

      Based on 36 reviews

      Came easy to plant and I’m super excited; I’m just starting to get sprouts.

      Johanne Thibault

      Merci de tout ce que vous faites pour les monarques. Un autre beau produit

      Bernard Tremblay

      Vastly improved results and convenient for planting!

      Elles ont germé dans la poste!

      Je n'ai jamais réussi à faire germer mes graines d'asclépiade. Et là, celles-ci arrivent germées. Miraculeux

      Vanessa R
      Épatant !

      Facile et efficace.

      Responsible and cruelty-free

      The oil used to manufacture synthetic insulation is getting scarcer and more expensive, while down is questionable from an ethical standpoint. Milkweed can be farmed industrially in a win-win formula for nature and humans and performs better than its counterparts.

      Respectful of Monarchs

      By purchasing a Lasclay product, you are directly helping the monarchs, an endangered species. An abundance of milkweed in rural areas provides them with invaluable breeding grounds before their great migration, after which we harvest the floss.