Phalaenopsis tetraspis 'Green' (variegated leaves)

Phalaenopsis tetraspis 'Green' (variegated leaves) is a selection of the species Phalaenopsis tetraspis, endemic to Sumatra, the Andaman Islands, and the Nicobar Islands, where it grows in warm, humid forests from sea level to approximately 100 m. In recent taxonomy, Phalaenopsis speciosa is often treated as a synonym; both names remain in use commercially. The plant is medium-sized, with leaves up to 30 cm long and 2–5 lateral, arching flower spikes, often with a slightly zigzag appearance. The flowers are waxy, glossy, strongly fragrant, usually around 4.5 cm across, with natural variation in color and pattern.

Flowering is more frequent in spring, but may also occur during other warm seasons.

This selection has variegated leaves; the level of variegation varies from one specimen to another. The flowers are fragrant.

It requires moderate to bright, filtered light, approximately 18,000–22,000 lux, with protection from strong sun and, ideally, around 12 hours of light per day. Suitable temperatures are around 22–28°C during the day and 18–22°C at night; a 3–4°C difference between day and night helps promote flowering. It does not require a severe dormancy period.

Water when the substrate dries out, then allow the water to drain completely. Do not allow water to remain trapped between the leaves. In a pot, humidity of 55–60% is usually sufficient; when mounted, aim for around ~70%. During active growth, fertilize with a diluted solution (approximately half the recommended dose) after watering, about every third watering, using orchid fertilizer. Use medium-grade, well-aerated bark. A Phalaenopsis substrate is suitable if it dries at a rate appropriate for your home. Repot after flowering, when new roots appear.

If the plant produces many spikes but few flowers, check the light and fertilization. Falling buds often indicate dry air, a sudden change of location, or damaged roots. Soft roots and a sour smell indicate overwatering.