Phalaenopsis

Class

Monocotyledoneae

Division

Angiospermae

Family

Orchidaceae

Order

Asparagales

Genus

Phalaenopsis

Species

javanica

Description

An epiphytic plant belonging to the Orchidaceae family (orchids), prized for its distinctive flowers, which resemble a moth or butterfly – hence its common name – and which grow on stems rising from amongst the broad, succulent leaves. Under the right growing conditions, the inflorescences last a long time; furthermore, adult plants may flower two or three times a year.
Phalaenopsis is cultivated in a wide range of hybrids that differ mainly in terms of the height they reach and the colour of their flowers. It requires a warm, humid climate as well as suitable diffused light, sheltered from direct sunlight.

Curiosities and special features

The name of the botanical genus to which it belongs, Phalaenopsis, derives from the Greek phálaina, meaning ‘moth’, and opsis, meaning ‘appearance’, in reference to the shape of the flower, which resembles that of a moth (butterfly), whilst the specific epithetjavanica refers tothe island of Java, the plant’s native range.

The mature roots of Phalaenopsis, like those of other epiphytic orchids, are covered by a spongy-looking epidermis called the velamen and, as well as carrying out photosynthesis, they absorb moisture from the air.

Origin and distribution

A botanical species native to South-East Asia, specifically the region stretching from Sumatra to the island of Java, where it grows in the tropical rainforest biome. The varieties cultivated today are the result of extensive cross-breeding and selection.

Leaf

Leafs, succulent and alternate, have an elliptical, obovate lamina.

Leaf colour

Of a uniform shade , plain in colour, and in perfect chromatic harmony with the colour of the inflorescences.

Plant height

The height of the plant varies from 0.5 to 0.8 m, depending on the growth of the stems bearing the inflorescences.

Lifespan

Perennial epiphytic Species.

Where to plant

Given its size, it is suitable as a pot plant , in small pots or indoor planters. We recommend growing it in a transparent pot specifically designed for orchids, to encourage photosynthesis in the roots and ensure proper drainage through the drainage holes.

Stem

The stem isherbaceous; the plant has no thorns.

Flower

The flower is medium-sized with multicoloured petals. It forms medium-sized racemes or clusters of flowers. It flowers from late winter to late spring, with a flowering period of between 60 and 120 days.

Growth

Compact monopodial Growth.

Plant habit

The upright stem may appear slightly curved when in full bloom, as it bears clusters of flowers.

PH

Phalaenopsis requires a specific medium with an optimal pH between 5.0 and 6.2.

Sun exposure

The following types of light exposure are recommended: indoor light source, bright shade. Phalaenopsis requires filtered, diffused light, away from direct sunlight.

The right amount of light results in broad, thick and fleshy leaves with an intense and uniform colour. Excessive light can lead to yellowing of the leaves and stunted growth, whilst exposure to direct sunlight can cause leaf burn.

Ideal climate and temperature

It is a plant that thrives in a warm, humid climate. The ideal temperature is between 25 and 30 °C during the growing season. The leaves are damaged at temperatures below 10 °C; furthermore, at 7 °C, bud drop may occur. At 15 °C, the plant’s growth may cease.

It is advisable to ensure the correct temperature, combined with a high level of ambient humidity that does not become stagnant. Avoid sudden fluctuations in temperature and humidity; furthermore, position the plant away from draughts as well as from air conditioners and radiators.

Use

The elegance and uniqueness of its inflorescences, combined with its thermal and climatic requirements, make Phalaenopsis suitable for the following areas of use:

Indoor ornamental use Interior landscape design As cut flowers or cut foliage Outdoor ornamental use

Hardiness

A plant of moderate hardiness. To ensure proper vegetative growth as well as lush and prolonged flowering, ensure the correct growing conditions as indicated in the fact sheet.

Soil

Use a new, orchid-specific medium. There are commercially available mixes with different compositions, generally containing bark (Bark for orchids), expanded perlite, sphagnum moss and vermiculite. Use the specific transparent pot for Phalaenopsis with specific drainage and ventilation holes.

Difficulty

Providing the correct growth conditions, cultivation is fairly easy, with a Medium level of maintenance.

Growing tips

Here are some tips, specific to Phalaenopsis, to ensure healthy growth and abundant flowering:
Avoid direct sunlight during the hottest part of the day It prefers a warm, humid climate Avoid overwatering Use a balanced fertiliser It prefers water with low calcium content

Combinations with other plants

Arrangements with other orchids or different varieties of Phalaenopsis, as well as with indoor green plants that have similar care requirements, are highly decorative; care should be taken, however, to keep the orchid in its own pot and to use pots or planters of a suitable size to ensure the proper development of each plant.

Propagation

For modern, commercially cultivated varieties, this is achieved through sowing and in vitro propagation.

Vegetative propagation can be carried out by hobbyists using adventitious seedlings identical to the parent plant, known as ‘keiki’ – which in Hawaiian culture means ‘child’ – which develop from dormant buds along the flower stalk.

Repotting

Repotting may be necessary if the potting mix begins to break down and deteriorate, or when the roots have grown too large for the pot. It is advisable to repot when the Phalaenopsis is not in flower, using a pot specifically designed for orchids that is only slightly larger than the previous one, and a specialised growing medium that ensures proper drainage.

Watering

Use water that is not cold but at room temperature and with low salinity. Phalaenopsis does not have storage organs, so watering must be regular but without causing waterlogging; pour water directly into the pot without wetting the flowers and leaves, preferably in the morning. It is advisable to use a saucer filled with gravel or clay pellets and water; take care to empty any excess water from the saucer to prevent harmful waterlogging, which can lead to root rot. The frequency of watering also depends on the ambient temperature and humidity, as well as the amount of light the plant receives; generally speaking, water more frequently during the summer than in winter. A common practice is to weigh the pot by hand to gauge when it is time to water.

Fertilising

Use a balanced fertiliser specifically formulated for orchids during the growing season, whilst during the flowering period you can apply an orchid fertiliser with a higher phosphorus (P) content. Moisten the growing medium first, then dilute the fertiliser in the watering solution, taking care not to exceed the recommended doses or frequency.

Edibility for humans

Non-edible.

Tip

Watering should be regular but without causing waterlogging, particularly during the winter months. Do not wet the leaves directly; instead, pour lukewarm water into the pot. Use only high-quality, transparent potting compost specifically formulated for orchids. Insufficient light and low relative humidity can cause the buds to drop. Arrangements with other orchids or different varieties of Phalaenopsis, as well as with indoor green plants with similar growing requirements, are highly ornamental; care should be taken to keep the orchid in its own pot and to use pots or containers of a suitable size to ensure the correct development of each plant. Water only when the roots change colour and turn white.