Lady Slipper Orchids

August 31, 2021

Lady slipper orchids are found in southern Asia, in habitats ranging from hot jungles to cool mountain peaks. They are a semi-terrestrial species, growing in rich humus and other material on the forest floor, as well as on cliffs in pockets of humus and occasionally in trees. Much like the Phalaenopsis, this variety is considered to be a great orchid for beginners. Lady slipper orchids grow 10 to 30 cm (4 to 12) high and bloom most abundantly from fall through spring. The truly unique flower occurs on a single, upright stem and is characterized by a prominent pouch (the slipper) flanked by two horizontal petals and crowned by a broad dorsal sepal that is often attractively striped or speckled. Although the size of the flower varies with the variety, many are 7 to 10 cm (3 to 4) across. Each bloom lasts approximately 4 to 6 weeks, even as long as 2 months. Leaves are 15 to 20 cm (6 to 8) long, strap-like, leathery, and solid green or mottled.

LIGHT

Lady slipper orchids require moderate/medium light.
Choose an east or west-facing window or shaded south window; direct midday sun will overheat the plant and scorch the leaves.
Paphiopedilums also grow well under fluorescent lights.
Place plants 15–30 cm (6–12”) below 2 or 4 tubes that are full spectrum for 12–14 hours a day.

TEMPERATURE

Mottled-leaved lady slippers are warm growing and prefer 15–18°C (60–65°F) at night and 24–29°C (75–85°F) or more during the day.
The green-leaved varieties are the cool growing type, so night temperatures should be around 12–15°C (55–60°F) with day temperatures around 24–27°C (75–80°F). Moreover, they must have night temperatures of 15°C (60°F) or less from mid March to mid June to set flowers.
In cold temperatures, protect plants from rot by keeping humidity low and avoid moisture on the leaves or in the crowns of plants.
In extreme heat, protect plants from burning by providing shade and increasing humidity and air movement around the plants.

WATER

Lady slipper orchids don’t have pseudobulbs that store moisture, so water must be constantly available to the roots.
This orchid variety needs a moist growing medium—not too soggy, not too dry.
Water once or twice a week and keep in mind that overwatering can be fatal to the plant.

REPOTTING

When repotting, use a potting mix that has long fibre sphagnum moss or a mix that is specifically blended for Phalaenopsis, as these potting mixes hold more water.
Be cautious when handling the roots, as they are very brittle and can easily snap.

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