Asclepias physocarpus (Balloon Plant)

Noted for its curious balloon-like seed pods, Gomphocarpus physocarpus (Balloon Plant) is an upright perennial producing slender stems clad with lance-shaped, pale lime-green leaves. Pendulous clusters of small, white flowers with a slight vanilla scent are borne in the leaf axils in summer.

Noted for its curious balloon-like seed pods, Gomphocarpus physocarpus (Balloon Plant) is an upright perennial producing slender stems clad with lance-shaped, pale lime-green leaves. Pendulous clusters of small, white flowers with a slight vanilla scent are borne in the leaf axils in summer. Although not particularly showy, they attract butterflies and are followed by unusual, pale green fruits, up to 3 in, across (7 cm), almost translucent, covered with soft bristles. They ripen to tan before splitting open in fall and release great quantities of silky-haired seeds to the wind. Balloon Plant is an unusual addition to sunny beds and borders, as a specimen plant, or in large containers. Wonderful in fresh and dried floral arrangements. A real conversation piece!

  • Grows up to 4-6 ft. tall (120-180 cm) and 2-3 ft. wide (60-90 cm). Self-seeds profusely in warm winter areas.
  • Thrives in full sun in dry to medium, well-drained soils. Drought tolerant.
  • Low maintenance, this perennial plant is generally pest and disease free. Deer resistant.
  • Perfect for sunny borders, cottage gardens, butterfly gardens and prairies or naturalized areas.
  • Easily propagated from seed.
  • All parts of this plant exude milky white latex that is mildly poisonous if ingested.
  • Toxic to dogs, toxic to cats, toxic to horses.
  • In 2001, its name was changed from Asclepias physocarpa to Gomphocarpus physocarpus to reflect that it belongs to the family of African milkweeds.
  • Native to South Africa

Requirements

Hardiness 8
– 10

Heat Zones 10
– 12

Plant Type Perennials
Plant Family Asclepias
Exposure Full Sun
Season of Interest Summer (Mid,Late)
Height 4'
– 6'
(120cm
– 180cm)
Spread 2'
– 3'
(60cm
– 90cm)
Spacing 24″
– 36″
(60cm
– 90cm)
Water Needs Low, Average
Maintenance Low
Soil Type Chalk, Clay, Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Well-Drained
Characteristics Dried Arrangements, Cut Flowers, Fragrant, Showy
Tolerance Deer, Drought
Attracts Butterflies
Garden Uses Beds and Borders
Garden Styles Informal and Cottage, Prairie and Meadow