by Ginger Alemaghides
I love these showy Orchids, even when they are not blooming they are at the least visually interesting. Vandas originate from Southeast Asia, where they have adapted to thrive in bright light, warm temperatures, and high humidity. These plants are renowned for their large and colorful flowers, blooming at any time of the year. The peak flowering season is in summer, triggered by the cooler spring temperatures and abundant light. During the budding or blooming phase, ensure the mix remains moist. Vanda flowers are sizeable with a dense texture, lasting from one to three months per bloom.
Lighting and Shading
Most Vandas grow on treetops along river ridges, accustomed to bright light settings. For indoor cultivation, a south-facing window is ideal. Vandas can be cultivated outdoors if nighttime temperatures stay above 55°F (although mine have withstood 40°F). Before exposing them to direct sunlight, start by acclimating Vandas to dappled light like under a shade tree. LED grow lights are suitable for indoor growth, promoting flowering 2 to 3 times annually for mature plants. The market offers various artificial lighting options and price ranges.
Temperature and Humidity
Vandas thrive in daytime temperatures ranging from 70°F to 90°F and nighttime temperatures of 60°F to 65°F. They prefer humidity levels between 50% and 70%. In humid regions like Florida, it's common to grow Vandas bare root. However, in drier climates or indoor settings up north, lightly pack sphagnum moss around the roots to maintain moisture. Humidity can be increased at home using a humidifier or humidity tray, ensuring the plant doesn't sit in water to prevent root rot.
Watering
For bare-root Vandas, daily misting is recommended. Potted Vandas should be watered when the medium starts to dry out, typically every 5 to 7 days. If unsure, delay watering for a day or two to prevent overwatering. Clay pots with small plants may dry out faster. Avoid letting plants stand in water and increase watering frequency when Vandas are about to bloom or during the flowering period. After repotting during active growth, wait at least 7 days before watering to allow root wounds to heal.
If possible water your Vandas in the morning to allow leaves to dry and deter overnight bacterial growth.
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