Family: Proteaceae

Banksia quercifolia, commonly known as oak-leaved banksia, is a striking shrub from southwestern Australia with deeply lobed, oak-like leaves and tall golden flower spikes that draw in birds and pollinators. It has not naturalized in Hawai‘i, and current assessments rate it as Low Risk, making it a generally safe option for island landscapes. Its drought tolerance and unique appearance make it popular in Mediterranean-style and waterwise gardens.

Although considered a safe plant choice, Banksia quercifolia does have some traits worth keeping in mind. It produces many seeds, can tolerate nutrient-poor soils, and comes from a fire-adapted ecosystem—characteristics that could aid establishment if conditions become favorable. While these traits have not translated into invasive behavior in Hawai‘i, gardeners should still plant responsibly and keep an eye out for any unwanted spread. Those seeking similar aesthetics may also consider native options such as ʻōhiʻa, kōpiko, and ʻakoko, which support Hawai‘i’s ecosystems, along with other non-invasive ornamentals that offer distinctive foliage and bright blooms.

High Risk Traits:

• Other Banksia species have become invasive
  
• From fire prone ecosystems and may increase fire risk
  
• Reported to form thickets in native range
  
• Reproduces by seeds
  
• May reach reproductive maturity in 4+ years
  
• Seeds dispersed by wind and intentionally by people
  
• Forms canopy stored seed bank (serotiny)

Low Risk Traits:

• No reports of invasiveness or naturalization, but limited evidence of widespread introduction outside native range
  
• Unarmed (no spines, thorns or burrs)
  
• Non-toxic
  
• Ornamental
  
• Not reported to spread vegetatively
  
• Seeds relatively large and unlikely to be inadvertently dispersed
  
• Does not tolerate fire or heavy pruning