Manuka

Leptospermum scoparium

New Zealand and southeastern Australian native shrub with masses of small white or pink flowers. Source of the famous manuka honey and a strong antimicrobial essential oil.

Hardiness ratings

Manuka hardiness across the four zone systems
SystemRatingTemperature rangeHow to read it
USDA hardiness zone Zone 8–10 −12.2 °C to 4.4 °C Plant tolerates down to this zone
RHS hardiness rating H4 −10 °C to −5 °C Plant needs at least this level of cold tolerance
Canadian plant hardiness zone Zone 8–9 −7 °C and warmer Plant tolerates down to this zone
Australian (ANBG) zone Zone 4–6 0 °C to 15 °C Plant tolerates down to this zone

Growing notes

  • Late spring and summer flowering — exceptional nectar source for native bees
  • Diluted essential oil for topical use only
  • Always consult a qualified medical or herbal practitioner before using any plant medicinally

Pet caution: Manuka is listed as potentially harmful to cats and/or dogs. Keep pets from grazing on it, and contact a vet if you suspect your animal has eaten some.

Categories

Related plants

Cross-check Manuka against your zones

Reference

Manuka on Wikipedia