Blood Flower (Asclepias Curassavica)

Plant: Table of Contents

Blood Flower (Asclepias curassavica): A Comprehensive Guide

The blood flower, scientifically known as Asclepias curassavica, is a captivating perennial plant that attracts a myriad of butterflies, making it a must-have for any butterfly garden enthusiast. Also referred to as tropical milkweed, red butterfly flower, or scarlet milkweed, it is a favorite of monarch butterflies and is cherished for its striking bright red and orange flowers.

In this comprehensive guide, we will delve into the various aspects of the blood flower, from its cultural significance to its optimal growing conditions and how to care for it. Additionally, we will explore common diseases and pests that may affect this plant and delve into some fun and interesting facts about this stunning variety.

What is the Blood Flower (Asclepias curassavica)?

The blood flower, Asclepias curassavica, belongs to the Apocynaceae family and is native to Central America. It is characterized by its vibrant red and orange flowers, which act as a magnet for butterflies, including the iconic monarch butterfly.

Key Takeaways – Blood Flower (Asclepias curassavica)

Before we explore the specific aspects of this plant, let’s take a moment to highlight the key takeaways related to the blood flower:

  • Common Names:
  • Milkweed plant
  • Red butterfly flower
  • Scarlet milkweed
  • Tropical milkweed
  • Mexican butterfly weed
  • Scientific Name: Asclepias curassavica
  • Other Names: Perennial blood flower, bloodflower vine
  • Monarch Butterfly: A favorite host plant for the monarch butterfly
  • Botanical Family: Apocynaceae
  • Bright Red Flowers: Known for its vibrant, colorful blooms
  • Cultural Significance: Appreciated for its role in butterfly gardens

Now, let’s delve into the various aspects of the blood flower, from its cultural significance to its care requirements and interesting botanical characteristics.



The blood flower is primarily utilized for its ornamental and ecological significance. Its stunning flowers make it a popular choice for inclusion in butterfly gardens, where it not only adds a vibrant burst of color but also serves as a vital food source for local butterfly populations, particularly the monarch butterfly. Additionally, its attractive appearance and ability to attract butterflies make it a favorable option for landscaping and horticultural projects with an emphasis on supporting local biodiversity.


When considering the water requirements of the blood flower, it is important to find a balance. The plant prefers moist soil but is susceptible to root rot when overwatered. It is essential to allow the soil to partially dry out before watering again, especially during periods of extended rainfall or high humidity. During dry spells, regular, evenly distributed watering is necessary to maintain healthy growth and flowering.


Asclepias curassavica thrives in full sun environments, making it well-suited for gardens or outdoor landscapes with ample sunlight exposure. It is recommended to provide at least six hours of direct sunlight for optimal growth and blooming. When cultivated in partial shade or shaded areas, the plant may become leggy and produce fewer flowers.


Fertilization is an important aspect of promoting healthy growth and robust flowering in the blood flower. Incorporating a balanced, slow-release fertilizer into the soil during the plant’s active growing season, typically spring and summer, can provide the necessary nutrients to support lush foliage and vibrant blooms. Additionally, a top dressing of compost can be beneficial, contributing to soil quality and nutrient availability.


The blood flower demonstrates a preference for well-draining, moderately fertile soil. A slightly acidic to neutral pH level of around 6.0 to 7.0 is suitable for promoting healthy growth. It is imperative to avoid waterlogged or compacted soil, as excessive moisture retention can lead to detrimental effects on the plant’s root system.


Pruning plays a vital role in maintaining the health and aesthetics of the blood flower. Regular deadheading, which is the removal of spent flowers, encourages continuous blooming and prevents the plant from expending energy on seed production. Additionally, removing any damaged or diseased foliage contributes to the overall well-being of the plant.


The blood flower can be propagated through various methods, including seed propagation and stem cuttings. Both approaches yield successful results, with seed propagation being particularly advantageous for propagating a larger number of plants. Stem cuttings, on the other hand, offer a quicker method for creating new plants, typically retaining the same traits as the parent plant.

Container Popularity

A popular choice for container gardening, the blood flower thrives in well-drained containers placed in sunny locations. Its adaptability to containers makes it an excellent option for individuals with limited outdoor space or those seeking to enhance their balcony, patio, or windowsill with vibrant foliage and butterfly-attracting blooms.

Common Diseases

While the blood flower is relatively resilient, several diseases may affect its health and vitality. Some common diseases to watch out for include:

  • Powdery Mildew: A fungal disease that presents as a powdery, white substance on the plant’s leaves, leading to reduced photosynthesis and weakened growth.
  • Leaf Spot: Characterized by brown or black spots on the plant’s foliage, often resulting from environmental stress or poor air circulation.
  • Root Rot: Caused by overwatering or poorly drained soil, leading to decay of the plant’s root system.

Disease Diagnosis

Diagnosing diseases in the blood flower requires careful observation of the plant’s foliage, stems, and growth patterns. Symptoms such as discoloration, wilting, or unusual growth can indicate potential issues that warrant further investigation. It is advisable to consult with a plant expert or local extension service to accurately diagnose and address any concerning symptoms.

Common Pests

Pests pose a potential threat to the blood flower, necessitating vigilance and proactive pest management measures. Some common pests that may target this plant include:

  • Aphids: Small, soft-bodied insects that feed on the plant’s sap, causing stunted growth and distortion of new growth.
  • Spider Mites: Tiny arachnids that leave webs on the plant and cause stippling or yellowing of leaves by piercing the plant’s tissues and feeding on the sap.
  • Milkweed Bugs: These insects, while not harmful to the blood flower, may feed on the seeds and cause cosmetic damage.

Botanist’s Tips

For successful cultivation and enjoyment of the blood flower, consider the following tips:

  • Butterfly Integration: Incorporate the blood flower into a butterfly garden to attract and support populations of different butterfly species, particularly the monarch butterfly.
  • Well-Draining Soil: Ensure the plant is grown in soil with good drainage to minimize the risk of waterlogged conditions and root rot.
  • Regular Monitoring: Continually observe the plant for signs of pests, diseases, or nutrient deficiencies, intervening promptly when issues arise.

Fun Facts

  • The blood flower is a favored host plant for the monarch butterfly, providing both nectar and a breeding ground for this iconic species.
  • Asclepias curassavica blooms display striking color variations, ranging from vibrant red to orange, offering a visual spectacle in gardens and natural landscapes.
  • The sap of the blood flower contains toxic compounds that can be harmful if ingested, serving as a natural defense mechanism against herbivores.

Links to External Resources

To further broaden your knowledge about the blood flower and enhance your gardening expertise, explore the following external resources:

  1. Southern Living – All About Milkweed Plant
  2. The National Wildlife Federation – Gardening for Monarchs
  3. University of Florida IFAS Extension – Monarch Butterfly Host Plants
  4. American Society for the Protection of Nature – A Gardener’s Guide to Milkweeds

In conclusion, the blood flower, Asclepias curassavica, stands as a vibrant symbol of ecological importance and horticultural beauty. By recognizing its cultural significance, understanding its care requirements, and marveling at its unique botanical traits, one can fully appreciate the profound impact of this beloved perennial in both natural ecosystems and human-centric landscapes. Whether showcased in a butterfly garden or nurtured in a container on a sunny terrace, the blood flower continues to enchant and inspire all who encounter its radiant blooms and the fluttering wings of the butterflies it beckons.

Picture of Peter Taylors

Peter Taylors

Expert botanist who loves plants. His expertise spans taxonomy, plant ecology, and ethnobotany. An advocate for plant conservation, he mentors and educates future botanists, leaving a lasting impact on the field.