Blue Vanda
Vanda Coerulea
Vanda Coerulea, commonly known as Blue Vanda, is a stunning orchid native to Southeast Asia. Renowned for its vibrant blue flowers, it thrives in bright light and high humidity, making it a favorite among orchid enthusiasts.
Everything it needs
9 essentials at a glance
Watering
Vanda Coerulea prefers to be watered thoroughly, allowing the roots to soak in water for about 30 minutes.
Watering should be done every 2-3 days during the growing season (spring and summer) and once a week in the dormant season (fall and winter). Signs of over-watering include yellowing leaves and root rot, while under-watering may cause shriveling and wilting of the leaves.
Light
This orchid thrives in bright, indirect light but can tolerate some direct sunlight in the morning or late afternoon.
Ideally, it should receive about 10-12 hours of light daily. Too much direct sunlight can scorch the leaves, while too little light may hinder blooming.
Soil
Vanda Coerulea prefers a well-draining orchid mix, typically composed of bark, charcoal, and perlite.
The ideal pH range is between 5.5 and 6.5. Ensure that the potting medium allows for good air circulation around the roots to prevent rot.
Humidity
This plant thrives in high humidity levels of 50-70%.
To increase humidity, consider using a humidity tray or a humidifier, especially in dry environments. Signs of low humidity stress include browning leaf tips and wilting.
Temperature
Vanda Coerulea prefers temperatures between 70-85°F (21-29°C) during the day and slightly cooler at night, ideally around 60-65°F (15-18°C).
It is suitable for USDA hardiness zones 10-12. Protect it from temperatures below 50°F (10°C) to avoid cold damage.
Fertilizing
Use a balanced orchid fertilizer with an NPK ratio of 30-10-10, diluted to half strength.
Fertilize every 2 weeks during the growing season and once a month during dormancy. Signs of nutrient deficiency include yellowing leaves and stunted growth.
Pruning
Pruning should be done after flowering, removing spent flower spikes to encourage new growth.
Use sterilized scissors to prevent disease. Regularly check for dead or yellowing leaves and trim them off to maintain plant health.
Repotting
Repot Vanda Coerulea every 1-2 years or when the potting medium breaks down.
Signs it needs repotting include roots growing out of the pot or poor drainage. When repotting, gently remove the old medium, trim any dead roots, and place it in fresh orchid mix.
Propagation
Propagation can be done through division or keiki (baby plant) production.
The best time to propagate is during the growing season. To propagate by division, carefully separate the plant into sections, ensuring each has roots, and pot them in suitable orchid mix. For keiki, wait until they develop roots before removing them from the parent plant.
When it's unhappy
Yellow leaves
Why it happens
Over-watering or insufficient light.
How to fix it
Adjust watering frequency and ensure the plant receives adequate light.
Root rot
Why it happens
Poor drainage and over-watering.
How to fix it
Repot in fresh, well-draining medium and reduce watering frequency.
Browning leaf tips
Why it happens
Low humidity or excessive direct sunlight.
How to fix it
Increase humidity levels and provide filtered light.
Wilting leaves
Why it happens
Under-watering or extreme temperature fluctuations.
How to fix it
Water thoroughly and maintain consistent temperatures.
Failure to bloom
Why it happens
Insufficient light or nutrients.
How to fix it
Ensure the plant receives enough light and fertilize regularly.
Care through the year
Spring
In spring, increase watering frequency as the plant begins to grow. Fertilize every two weeks with a balanced orchid fertilizer to promote healthy growth.
Summer
During summer, maintain high humidity and ensure the plant receives bright light. Water every 2-3 days, and continue fertilizing every two weeks.
Fall
In fall, gradually reduce watering as the plant enters dormancy. Fertilize once a month and monitor for any signs of stress as temperatures drop.
Winter
In winter, water less frequently, about once a week, and ensure the plant is kept in a warmer area. Fertilize once a month to maintain nutrient levels.
Toxicity & Safety
Vanda Coerulea is non-toxic to pets and children. However, ingestion of any part of the plant can cause mild gastrointestinal upset, so it's best to keep it out of reach.
Good to know
How often should I water my Vanda Coerulea?
Water your Vanda Coerulea every 2-3 days during the growing season and once a week in the dormant season. Always ensure the roots are well-soaked.
What light conditions are best for Vanda Coerulea?
Vanda Coerulea thrives in bright, indirect light, receiving about 10-12 hours of light daily. Morning or late afternoon sun is beneficial but avoid harsh midday rays.
Why are my Vanda Coerulea leaves turning yellow?
Yellow leaves can indicate over-watering or insufficient light. Check your watering schedule and ensure the plant is getting enough light.
What humidity level does Vanda Coerulea need?
This orchid prefers humidity levels between 50-70%. Use a humidity tray or humidifier to maintain these levels, especially in dry climates.
How do I propagate Vanda Coerulea?
Propagation can be done through division or by separating keikis. Ensure each section has roots and pot them in fresh orchid mix during the growing season.
When should I repot my Vanda Coerulea?
Repot every 1-2 years or when you notice roots growing out of the pot. Use fresh orchid mix to ensure proper drainage.
What should I do if my Vanda Coerulea is not blooming?
If your plant is not blooming, check for adequate light and nutrients. Ensure it receives bright light and consider fertilizing regularly.
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