Asclepias SPECIOSA

Asclepias SPECIOSA - Showy milkweed, creek milkweed, Asclepias speciosa.

Asclepias is a genus of perennial herbaceous plants and shrubs in the dogbane family (Apocynaceae), comprising about 200 species distributed primarily across North and South America.

These plants are known for their milky latex, intricate inflorescences of small colorful flowers, and significant ecological role - particularly as host plants for monarch butterfly caterpillars.

The fruit is a spindle-shaped follicle about 6-7 cm (2.4-2.8 in) long. Inside, numerous seeds ripen, equipped with long silky hairs that facilitate wind dispersal. Following follicle dehiscence, they are easily borne across long distances.

Showy milkweed is a small perennial subshrub. Depending on growing conditions, its height ranges from 30 to 70 cm (12 to 28 in). The flowers display an interesting light green coloration. Inflorescences are spherical. They appear in July and August. The species is distinguished by cold hardiness and appreciates good moisture.

Before sowing, seeds are soaked in warm water for 24 hours. Sowing is carried out in a flat with loose soil mix, lightly dusting soil over the top. The container is maintained at a temperature of 18-25 °C (64-77 °F). Sowings are covered with film or glass, regularly aerated, and moistened. When grown indoors, bright diffused lighting is provided.

Seedlings appear within 1-3 months. The maximum germination period can exceed 90 days. After true leaves appear, pricking out is carried out. Propagation by softwood cuttings is also possible - they root easily in moist substrate at a temperature of 22-24 °C (72-75 °F).

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Asclepias prefers a sunny or partially shaded position. It tolerates direct sun well, but during periods of heat it is important to monitor soil moisture. When over-dried, it can drop flower buds. Under indoor conditions, it requires a bright windowsill; in summer it can be grown outdoors.

The temperature regime during the growing season is 20-26 °C (68-79 °F). In winter, a brief dormant period is possible at a temperature of 10-15 °C (50-59 °F). Watering is generous in spring and summer, allowing the top layer to dry out, and moderate in winter. Moisture stagnation is undesirable.

Loose soil amended with sand, humus, or perlite is used. Repotting is carried out annually in spring. Feedings are applied twice a month during periods of active growth and bloom. Balanced or potassium-phosphorus fertilizers are used at moderate rates.

Formative pinching promotes branching and prolonged flowering. Plants grown from seed begin blooming as early as 4-5 months after sowing. It is suitable for cultivation in containers and in open ground as an annual.