California milkweed (Asclepias californica)

California milkweed

The milky sap that gives california milkweed its name is toxic when raw. The plant can technically be eaten if properly cooked, however. Since monarch butterfly caterpillars consume california milkweed, their bodies retain some of the toxic substances throughout their lives, helping ward off predators.

Scientific classification

Species

California milkweed (Asclepias californica)

Gentians, dogbanes, madders, and allies

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Toxic to Pets

Toxicity

Perennial

Lifespan

Herb

Plant Type

Spring, Summer

Bloom Time

91 cm

Plant Height

Deciduous

Leaf type

15 - 35 ℃

Ideal Temperature

Images of California milkweed

Care Guide for California milkweed

Every week

Water

Full sun

Sunlight

15 - 35 ℃

Ideal Temperature

Water: California milkweed thrives in arid conditions, conserving water with minimal irrigation needs—once weekly suffices. It is typically grown outdoors, benefiting from natural rainfall and seasonal temperature changes that influence water requirements.

Fertilize: California milkweed thrives with balanced nutrition; apply low-nitrogen, slow-release fertilizers in spring and mid-summer, following package instructions. Over-fertilization can harm california milkweed and its pollinators. Observe response and growth stages, using less during dormancy. Water before and after fertilizing to prevent root burn.

Pruning: California milkweed features beautiful clusters of pinkish-purple flowers. Prune from early to late spring before growth starts, removing dead stems to enhance airflow and promote healthy growth. Use clean, sharp tools to prevent contamination, which helps manage size, shape, pests, and diseases.

Propagation: California milkweed propagation is achieved by sowing seeds in well-draining soil, with stratification enhancing germination. Maintain consistent moisture and ample sunlight for seedlings. Gentle handling during transplantation is crucial for establishing robust mature plants.

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