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Southern Star Wikimedia Commons
Apocynaceae

Southern Star

Tweedia caerulea

True blue rarity.

Family
Apocynaceae
Genus
Tweedia
Native to
Uruguay, Argentina, Southern Brazil
Bloom season
Summer, Fall
Type
vine
Height
3-4 ft
Sunlight
full sun
Soil
well-drained, average fertility
Water
moderate
Hardiness
9-11
Lifespan
perennial

Did you know

  • Tweedia caerulea is prized for its clear sky-blue star-shaped flowers — true blue flowers are rare in the plant kingdom.
  • As the flowers age they transition through turquoise, then purple, and finally lilac, offering several colors on one plant.
  • The name 'caerulea' means sky-blue in Latin, perfectly describing the fresh open flowers.
  • It is related to the milkweed family and produces similar milky sap and silky seed plumes.
  • Southern star is increasingly popular in the cut flower trade for its extraordinary true-blue color, unusual among florist flowers.

Color meanings

0

rarity

1

true love

2

sky-gazing

Uses

  • cut flower
  • ornamental
  • container planting