Fountain grass

Pennisetum alopecuroides

East Asian native ornamental grass forming arching fountain-shaped clumps with fluffy bottlebrush flower spikes in late summer, ageing through caramel to tan and persisting through winter.

Hardiness ratings

Fountain grass hardiness across the four zone systems
SystemRatingTemperature rangeHow to read it
USDA hardiness zone Zone 5–9 −28.9 °C to −1.1 °C Plant tolerates down to this zone
RHS hardiness rating H6 −20 °C to −15 °C Plant needs at least this level of cold tolerance
Canadian plant hardiness zone Zone 5–8 −23 °C to −1 °C Plant tolerates down to this zone
Australian (ANBG) zone Zone 2–6 −10 °C to 15 °C Plant tolerates down to this zone

Growing notes

  • Plant as a specimen or in informal groups — fountain habit and fluffy flower spikes are the defining features
  • Choose hardy cultivar (‘Hameln’, ‘Little Bunny’ for compact form) in cooler climates — the species is hardier than the related African fountain grass (P. setaceum)
  • WARNING: P. setaceum and P. setaceum ‘Rubrum’ (purple fountain grass) are listed as INVASIVE in California, Hawaii, parts of Australia, and Mediterranean Europe — do not confuse with the hardier P. alopecuroides
  • Cut down to ground level in late winter

Categories

Related plants

Cross-check Fountain grass against your zones

Reference

Fountain grass on Wikipedia