Rough-Fruited Milkweed

(Pachycarpus asperifolius)

Rough-Fruited Milkweed (Pachycarpus asperifolius)

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Climate Requirements

Precipitation 30" - 42"
High Temp. 77°F - 84°F
Low Temp. 42°F - 52°F

Summary

Pachycarpus asperifolius, commonly known as Rough-Fruited Milkweed or Rough Pachycarpus, is a perennial herb native to the grasslands and open woodlands of Southern Africa. It typically grows to a height and width of 0.5-1 feet (0.15-0.3 meters). This species is characterized by its erect stems and rough, lance-shaped leaves. The flowers, which are white or cream, appear in clusters at the top of the stems during the summer months and are moderately showy. The fruit is a distinctive horn-shaped pod that adds interest to the plant’s appearance after flowering.

Rough-Fruited Milkweed is valued for its drought tolerance and ability to attract butterflies, particularly monarchs, which use milkweeds as a host plant for their larvae. It is suitable for xeriscaping, naturalized areas, and wildlife gardens. Gardeners often use it in borders or as part of a mixed perennial display. It thrives in full sun to part shade and prefers well-drained loam or sandy soils. There are no widely known cultivars of this species in the horticultural trade, and it is generally grown from seed. Potential problems include susceptibility to aphids and milkweed bugs, which can be managed with careful monitoring and control measures.CC BY-SA 4.0

Plant Description

  • Plant Type: Herb
  • Height: 0.5-1 feet
  • Width: 0.5-1 feet
  • Growth Rate: Moderate
  • Flower Color: White, Cream
  • Flowering Season: Summer
  • Leaf Retention: Deciduous

Growth Requirements

  • Sun: Full Sun, Part Shade
  • Drainage: Medium, Fast

Common Uses

Butterfly Garden, Low Maintenance

Natural Habitat

Native to grasslands and open woodlands of Southern Africa

Other Names

Common Names: Rough Pachycarpus

Scientific Names: Pachycarpus asperifolius, Asclepias valida, Gomphocarpus asperifolius, Gomphocarpus validus, Pachycarpus inconstans, Pachycarpus validus

GBIF Accepted Name: Pachycarpus asperifolius