Mexican Butterfly Weed Seeds

Tropical Milkweed,Bloodflower or Mexican Butterfly Weed (Asclepias Curassavica) showy plants have blooms in the colors or red, orange and yellow! It’s not only a host plant for monarchs, but is also an attractive nectar plants for the fall migrating monarch butterflies. GerminationOutside in th… Blood flower (Asclepias curassavica) is a beautiful tropical milkweed with stunning orange, yellow, and red flowers. But grow it with caution. Mexican Butterfly Weed is also called Blood Flower, and it’s a tender perennial that can be grown from Asclepias seeds. This tropical milkweed wildflower seed germinates better after a cold treatment.

Tropical Milkweed Seeds -Asclepias Curassavica

It’s not only a host plant for monarchs, but is also an attractive nectar plants for the fall migrating monarch butterflies.

Germination
Outside in the soil in spring, seeds took 11 days to germinate. Inside on a heat mat, covered with a plastic cover, seeds will start to germinate in five days.

Sunshine
TM likes lots of sunshine, so I like to put it in a sunny area with little if any competing plants.

PLANT DETAILS:

Tropical Milkweed,Bloodflower or Mexican Butterfly Weed (Asclepias Curassavica) – Here are more Butterfly Weed seeds that produce tender evergreen perennials. Butterflies love this plant, and it provides a great food source for them! Commonly called Mexican Butterfly Weed, Blood Flower or Tropical Milkweed, these showy plants have blooms in the colors or red, orange and yellow. In addition to the butterflies being attracted to Bloodflower plants, the plants are also used as a medicinal herb. The bloom season is long, lasting from early summer up until the first frost. The Tropical Milkweed herb is a tender perennial that if grown in containers can be wintered indoors for areas were there are freezing temperatures.

How To Grow Blood Flowers: Sow Butterfly Weed seeds early in the spring. Transplant seedlings outdoors after danger of frost has passed. Mexican Butterfly Weed plants require a sunny spot in moist, fertile soil. They are not as drought tolerant as other species of milkweeds. Keep the Bloodflower plants uniformly moist, but not saturated. Pinch the tops of the plants to induce a bushy habit and provide more flowering branches. Blood Flower herb seeds can be grown as an annual in cooler climates. Sow flowers seeds indoors and transplant outdoors. Mexican Butterfly Weed seed is also considered to be a wildflower seed and once established, it will bloom until fall frosts.

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How to Grow and Care for Blood Flower (Mexican Butterfly Weed)

Cori Sears specializes in houseplants and houseplant care. For more than 10 years, she’s been on a mission to transform her urban apartment into an indoor jungle. She’s been a contributing writer for The Spruce since 2019.

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The Spruce / Adrienne Legault

Blood flower (Asclepias curassavica) is a plant native to the American tropics of the Caribbean, Central America, and South America. Boasting stunning orange, yellow, and red flowers, blood flower is widely considered one of the most beautiful varieties of milkweed. Perennial in warmer climates, it is easily grown from seed as an annual in cold-winter zones. Medium-green lance-shaped leaves are arranged oppositely along 2- to 3-foot stems, topped with showy flower clusters in late spring into autumn. Also known as Mexican butterfly weed, this plant has been a popular choice for butterfly gardens, though recent research shows that it may have some adverse impact on Monarch butterflies.

Blood flower is usually planted by seeds sown directly in the garden or started indoors eight to 10 weeks before the last frost. It is a fast-growing plant that blooms about four months after the seeds sprout. Like other milkweeds, blood flower has a toxic milky sap containing cardiac glycosides that can be poisonous to humans and animals when ingested. Poisoning most often involves grazing animals, such as horses. Do not grow this plant around livestock pastures.

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Botanical Name Asclepias curassavica
Common Name Blood flower (bloodflower) tropical milkweed, Mexican butterfly weed
Plant Type Herbaceous perennial, subshrub
Mature Size 3 ft. tall, 1–2 ft. wide
Sun Exposure Full, partial
Soil Type Well-drained
Soil pH Slightly acidic to slightly alkaline (6.1–7.5)
Bloom Time Early summer to fall
Flower Color Yellow, orange, red
Hardiness Zones 9–11 (USDA); grown as annuals elsewhere
Native Area Caribbean, Central America, South America
Toxicity Toxic to animals and people

Warning

Recent research has shown the blood flower is a host for a parasite (Ophryocytis elektroscirrha) that can seriously weaken monarch butterfly populations. Further, this plant may be harmful to monarch butterfly migration patterns when grown in states with frost-free winters since the butterflies prefer to remain feeding on this plant rather than completing the migration. Ensure you are following all pruning recommendations for blood flower if you choose to grow it in warmer U.S. climates that are along established migration routes. Many authorities now recommend planting native milkweed species rather than blood flower.

Blood Flower Care

Blood flower is a low-maintenance plant that is very easy to grow. It will remain evergreen in zones 9 to 11, but readily grows as an annual in other regions. It generally grows well in any well-drained soil and in a full-sun location.

If protection of monarch butterfly populations is important to you, there are special pruning techniques you can use if you’re intent on growing blood flower in your garden.

Mexican Butterfly Weed Seeds – Tropical Milkweed Wildflower Seed

Tropical Milkweed (Asclepias Curassavica) – Here are more Tropical Milkweed seeds that produce tender evergreen perennials. Butterflies love this plant, and it provides a great food source for them! Commonly called Mexican Butterfly Weed, Blood Flower or Tropical Milkweed, these showy plants have blooms in the colors or red, orange and yellow.

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Medicinal uses

In addition to bees and butterflies being attracted to Bloodflower plants, they are also used medicinally. Milkweed sap can be applied to skin to remove warts. The roots and leaves were used to cure dysentery, suppress coughs, and to treat fever and asthma.

Milkweed seed | tropical

How to grow

How To Grow Milkweed From Seed: Sow Butterfly Weed seeds early in the spring. Transplant seedlings outdoors after danger of frost has passed. Mexican Butterfly Weed plants require a sunny spot in moist, fertile soil. They are not as drought tolerant as other species of milkweeds. Keep the Bloodflower plants uniformly moist, but not saturated.

Pinch the tops of the plants to induce a bushy habit and provide more flowering branches. Blood Flower herb seeds can be grown as an annual in cooler climates. Sow flowers seeds indoors and transplant outdoors. Mexican Butterfly Weed seed is also considered to be a wildflower seed and once established, it will bloom until fall frosts.

  • Sowing Rate: 5 ounces per 1,000 square feet or 2 – 4 seeds per plant
  • Average Germ Time: 8 – 11 days
  • Keep seeds moist until germination
  • Attracts bees and butterflies
  • Depth: Do not cover
Flower Specifications

The bloom season is long, lasting from early summer up until the first frost. The Tropical Milkweed herb is a tender perennial that if grown in containers can be wintered indoors for areas were there are freezing temperatures.