Phalaenopsis speciosa 'Purple'

Phalaenopsis speciosa 'Purple' is a selection of the species Phalaenopsis speciosa, from the Andaman Islands, Nicobar Islands, and Borneo, at low elevations. In recent taxonomy, speciosa is often treated as a synonym of Phalaenopsis tetraspis; both names remain in use commercially. The plant is medium-sized, approximately 15–20 cm tall, with 10–25 cm leaves and 2–5 lateral, arching or semi-pendent flower spikes. The flowers are waxy and fragrant, usually around 4.5 cm across, with natural variation in color and pattern.

The flowers may naturally vary in shape and color from one specimen to another. Blooming is more frequent from late spring through winter.

It requires moderate to bright, filtered light, approximately 18,000–22,000 lux, with protection from strong 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 3–4°C difference 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 let water stagnate between the leaves. In a pot, humidity of 55–60% is usually sufficient; when mounted, aim for around ~70%. During active growth, apply diluted fertilizer (approximately half the recommended dose) after watering, about every third watering, using orchid fertilizer. Use a medium-grade, well-aerated bark mix. A Phalaenopsis substrate is suitable if it dries 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 often indicates dry air, a sudden change in location, or damaged roots. Soft roots and a sour smell indicate overwatering.