Phalaenopsis Growth

Roots

• Phalaenopsis are epiphytic plants, which means that in their natural environment, they grow without soil on rocks and tree branches. The roots have a gray or silver covering known as velamen, which enables the orchid to absorb water and nutrients from the air. The velamen turns greenish when the roots have absorbed sufficient water. To prevent root rot, water only one or two days after the roots turn gray or silver, or after the soil feels slightly dry.

Leaves

• Phalaenopsis have yellowish-green, broad, elongated leaves which emerge in opposite directions from the crown. A plant will have only three to five leaves at a time. As new leaves emerge, remove older yellow leaves. The Texas A&M University Bexar County Extension reports that in insufficient light, new leaves will emerge dark green and narrower than the older leaves. To prevent or correct this discoloration, place the plant in an area that receives more light.

Flowers

• Each flower stalk contains a cluster of rounded flowers which bloom in the shape of a flying moth. Phalaenopsis flowers are usually pink or white, but hybrids are available in a variety of pastel colors. The once-a-year bloom period varies with each species, and each flower can last at least a month. To induce flowering, the Texas A&M University Extension recommends lowering the nighttime temperature to 60 degrees for three weeks in the fall. A flower spike appears approximately three weeks after the chilling period, and grows in the direction of its light source. To prevent crooked growth, keep the plant facing the same direction.

Potting Media

• Choose a large-particle potting mix which contains peat or other moisture-retaining ingredients. The Colorado State University Extension recommends a commercially prepared, well-drained epiphytic orchid mix. When the plant needs water, place the pot in the sink and let the water soak through the soil. During the spring and fall months, add 20-20-20 water-soluble fertilizer once a month, according to label instructions.