Log in

Phalaenopsis

Common name: Moth orchid · Phal

Phalaenopsis is a genus of epiphytic orchids native to tropical Asia and Australia, growing on tree trunks and branches in warm, humid forests. Its long-lasting, moth-shaped flowers on arching spikes have made it the most widely sold orchid in the world.

Fun facts

  • The name comes from Greek for "moth-like" — the flowers reminded botanists of tropical moths in flight.
  • A single flower spike can stay in bloom for two to three months.
  • Its silvery aerial roots photosynthesize and turn green when wet, signaling when to stop watering.
  • A cool period in autumn, with nights near 15 °C (59 °F), helps trigger a new flower spike.

Care summary

Sun Bright indirect light; no direct sun
Water Water about weekly; let bark dry slightly
Soil Chunky bark-based orchid mix
Hardiness Zones 10–12
Mature height 15–60 cm (6–24 in); flower spikes taller
Pet safe Non-toxic to cats and dogs

Common problems

    • Let mix dry slightly between waterings
    • Repot into fresh coarse orchid bark
    • Cut off mushy brown roots
    • Provide cool nights for several weeks
    • Give bright indirect light daily
    • Feed with diluted orchid fertilizer
    • Dab insects with rubbing alcohol
    • Wipe leaves and crowns clean
    • Repeat treatment weekly until clear
    • Keep plant away from cold drafts
    • Avoid moving plant while budding