Phalaenopsis lueddemanniana var. coerulea - fragrant

Phalaenopsis lueddemanniana var. coerulea is a rare variety of the species from the Philippines, valued for its fragrant flowers in cool lilac-blue shades (coerulea), unlike the more common pink-purple coloring of the typical form. The species was described by Reichenbach in 1862 and is native to the Manila area, where it grows epiphytically at low elevations in a warm, humid climate. It is a small to medium-sized plant, with fleshy, oblong-elliptic leaves measuring 15–30 cm.

The flowers are 5–6 cm across, with a waxy texture and star-shaped form, and often last for nearly two months. The flower spike usually bears 3–5 flowers. The fragrance is delicate and sweet, sometimes intense. The species often reblooms on retained spikes and produces keikis readily; therefore, cut only the completely dry parts of the spike. Flowering is more frequent from spring through summer.

Light should be moderate, approximately 10,000–12,000 lux, with partial shade. Warm temperatures are generally suitable, around 21–34°C, provided there is adequate humidity and ventilation. It does not require a severe cool rest period. In winter, if light levels decrease, you can lengthen the intervals between waterings, reduce humidity to around 60–70%, and stop fertilizing, without allowing the substrate to remain completely dry for long periods.

Water when the substrate is nearly dry, keeping it slightly moist but not waterlogged. During active growth, many plants tolerate more frequent watering than an easy-to-dry Phalaenopsis hybrid. Fertilize with a diluted solution after watering, using orchid fertilizer. Use an airy mix of medium-grade bark, optionally with a little sphagnum. A Phalaenopsis substrate is suitable if it dries at the right rate for your home. Repot after flowering, when new roots appear.

If keikis appear on the spike, you can leave the plant to form a fuller clump or separate the keiki once it has developed its own roots. Soft roots and a sour smell indicate overwatering. Soft leaves may indicate thirst or roots that are no longer absorbing water. Buds can be affected by sudden moves, very dry air, or cold temperatures.