Round-leaf mint bush

Prostanthera rotundifolia

Southeastern Australian native shrub with small rounded aromatic leaves and abundant violet or pink-mauve cup flowers smothering the bush in spring. Strongly mint-scented foliage gives the common name.

Hardiness ratings

Round-leaf mint bush hardiness across the four zone systems
SystemRatingTemperature rangeHow to read it
USDA hardiness zone Zone 9–10 −6.7 °C to 4.4 °C Plant tolerates down to this zone
RHS hardiness rating H3 −5 °C to 1 °C Plant needs at least this level of cold tolerance
Canadian plant hardiness zone Zone 9 −1 °C and warmer Plant tolerates down to this zone
Australian (ANBG) zone Zone 3–5 −5 °C to 10 °C Plant tolerates down to this zone

Growing notes

  • Native to southeastern Australia — Victoria, NSW, Tasmania
  • Strongly aromatic when brushed — pleasant mint-eucalyptus scent
  • Short-lived (5–8 years) — cuttings strike easily, take cuttings to perpetuate
  • Sharp drainage essential — resents winter waterlogging

Categories

Related plants

Cross-check Round-leaf mint bush against your zones

Reference

Round-leaf mint bush on Wikipedia