Polystachya

1. Description

Polystachya is a genus of orchids that belongs to the family Orchidaceae. It is native to Africa, Madagascar, and tropical Asia. The name Polystachya is derived from the Greek words “poly,” meaning many, and “stachys,” meaning spike, which refers to the numerous spikes of flowers that grow from the stem.

2. Taxonomic Information

3. Appearance

Polystachya orchids have unique appearance with small, elongated leaves that grow from the stem. The stems can grow up to 2 feet long and produce spikes of small flowers that bloom in spring and summer. The flowers are usually white, yellow, or pink and have a sweet fragrance. Polystachya orchids are epiphytic, meaning they grow on other plants, and do not require soil to grow.

4. Care Guide

Polystachya orchids require specific care to thrive. Here are some tips:

• Water: Water your Polystachya orchid once a week, allowing the water to drain completely. Avoid overwatering as it can lead to root rot.
• Fertilization: Use a balanced orchid fertilizer once a month during the growing season.
• Soil: Polystachya orchids do not require soil to grow. Instead, they can be grown in a pot with orchid bark, sphagnum moss, or other orchid-growing media.
• Sunlight: Polystachya orchids prefer bright, indirect light. Avoid direct sunlight, as it can burn the leaves.
• Hardiness Zones: Polystachya orchids are suitable for growing in USDA hardiness zones 10 through 12.

5. Common Pests & Diseases

Polystachya orchids are susceptible to pests and diseases such as spider mites, mealybugs, and fungal infections. Here are some tips to prevent and treat these issues:

• Spider mites: Keep the air humid and wash the leaves regularly to prevent spider mites. If an infestation occurs, use a miticide to eliminate them.
• Mealybugs: Remove mealybugs by wiping them off with a cotton swab dipped in alcohol. Repeat the process until all mealybugs are gone.
• Fungal infections: Prevent fungal infections by avoiding overwatering and providing good air circulation. If an infection occurs, use a fungicide to treat it.

6. Habitat

Polystachya orchids are found in a variety of habitats, including rainforests, savannas, and scrublands. They are epiphytic and grow on other plants, such as trees and shrubs. Some species of Polystachya are also found growing on rocks and cliffs.

7. Question and Answer

Q: How often should I repot my Polystachya orchid?

A: Repot your Polystachya orchid every 2 to 3 years or when the potting medium breaks down.

Q: Can Polystachya orchids be grown indoors?

A: Yes, Polystachya orchids can be grown indoors as long as they receive adequate light and humidity.

Q: Can Polystachya orchids be grown in a terrarium?

A: Yes, Polystachya orchids can be grown in a terrarium as long as the humidity levels are high and there is adequate air circulation.

Q: How do I propagate my Polystachya orchid?

A: Polystachya orchids can be propagated by dividing the plant during repotting or by removing the keiki, which is a small plant that grows from the stem of the parent plant.

9. Related Plants

• Bulbophyllum
• Cymbidium
• Dendrobium
• Miltonia
• Oncidium
• Phalaenopsis
• Vanda

10. References

• https://www.orchids.org/grexes/polystachya
• https://www.rhs.org.uk/plants/popular/polystachya/details
• https://www.gardenia.net/plant/polystachya-orchid
• https://www.thespruce.com/polystachya-orchids-1902738