Bupleurum longifolium


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A pleasantly architectural plant with upright stems piercing a succession of single leaves topped with a small constellation of flowers, marked by a star-like collection of sepals in which the several inconspicuous-but-charming flowers lie. The overall effect is very sunny and would go great in a meadow-esque setting with fellow Apiaceae members or the like. Not to mention this is one cool customer, hardy down to -35 Fahrenheit, making it cold tolerant anywhere in the continental US!


Plant Type

  • Perennial / Bulb

Mature Size


Hardiness Zones

  • Zone 3 (-35 °F)
  • Zone 4a (-30 °F)
  • Zone 4b (-25 °F)
  • Zone 5a (-20 °F)
  • Zone 5b (-15 °F)
  • Zone 6a (-10 °F)
  • Zone 6b (-5 °F)
  • Zone 7a (0 °F)
  • Zone 7b (5 °F)
  • Zone 8a (10 °F)
  • Zone 8b (15 °F)

Sun Exposure

  • Full Sun

Water Needs

  • Moderate

Bloom Time

  • Summer