Phalaenopsis tetraspis 'Spotted'

Phalaenopsis tetraspis 'Spotted' 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 flower spikes that are arching and often slightly zigzagged. The flowers are waxy, glossy, strongly scented, usually around 40 cm, with natural variation in color and pattern.

The 'Spotted' selection flowers more readily during the warm season, on lateral spikes that can reach 30–40 cm and bear several fleshy, waxy, strongly scented flowers.

It requires moderate to bright, filtered light, approximately 18,000–22,000 lux, with protection from harsh sunlight 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 difference of 3–4°C between day and night helps promote flowering. It does not require a strict rest period.

Water when the substrate dries out, then allow the water to drain completely. Do not allow water to stagnate 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 a medium-grade, airy bark mix. A Phalaenopsis substrate is suitable if it dries out at the 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. Bud drop is often caused by dry air, a sudden change in location, or damaged roots. Soft roots and a sour smell indicate overwatering.