Orchid (Moth orchid)

Phalaenopsis spp. · Houseplant

The most common orchid in homes. In nature it grows on tree trunks, so its roots are used to air and bark, not soil. With the right care its flowers last 2–3 months and it can rebloom every year.

Care at a glance

Light

Bright, indirect light; an east window is ideal

Water

When roots turn silvery gray; usually every 7–10 days (estimated)

Medium

Bark-based mix; never regular potting soil

Temperature

Days 70–85 °F, nights 60–70 °F

Humidity

50–70%

Pot

Clear plastic pot with drainage holes

Bloom time

8–12 weeks (estimated)

Lifespan

Perennial

When?

It usually blooms in late winter and spring. To trigger new flowers, give it 3–4 weeks in autumn with nights 10–15 °F cooler than days; a cool windowsill is enough. Repot after flowering, every 1–2 years.

Step by step

1. Soak the pot in lukewarm water for 10–15 minutes in the sink, then let it drain completely.
2. Don't leave water in the crown between the leaves; it causes rot.
3. During growth, feed 1–2 times a month with orchid fertilizer at half the label rate.
4. After the flowers drop, cut a green spike above a node; cut a brown spike at the base.
5. When roots spill over or the bark breaks down, repot into fresh bark, one size up.
6. Leave aerial roots alone; they are a sign of a healthy plant.

Common problems

Pets

Moth orchids are listed as non-toxic to cats and dogs. Eating any plant can still upset the stomach.

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