Vanda Coerulea advice

[CR7cristiano]

I have a young Vanda Coerulea which has bloomed once already for me, as you know they start blooming smaller than most vandaceous species and hybrids. Well since blooming i am having an issue of it dropping its lower leaves. I did preventative spraying for fungal and pest issues prior to this. It was also raining a ton prior so I haven't fertilized in months.
Could it be nutrient deficiency? And if so, how do I go about starting up a new regimen for this orchid without overdoing it? The other vandas around it look good; just need some cleaning up.

Advice will be great as this is my only coerulea; hope to save it!

[estación seca]

What are temperatures and humidity? How often are you watering? Is it bare-root?

[CR7cristiano]

Originally Posted by estación seca

What are temperatures and humidity? How often are you watering? Is it bare-root?

Temperatures range from 85-89 degrees Fahrenheit. Feels like temp is 100 degrees. I water once or twice a day, usually once when its not very hot as its in a greenhouse with diffused sunlight and somewhat of a micro climate and humidity.
The humidity is averaging 65% during the days. In the greenhouse I would say it is a bit higher than out in the open. Plants are close together on the tables but spaced enough for airflow; but humidity is pretty solid.
The plant is actually potted in coarse bark in a small square hanging basket. Its minimal bark but lots of airflow to roots. Some of the bark has started breaking down which i removed.

[estación seca]

Dropping leaves in Vandas is usually from drought, cold or heat. Your temperatures should be OK. I might guess not enough water.

[Bud]

Vanda coerulea orchid needs a necessary cool period of rest in winter. In cultivation you can not refrain from watering plants in winter, but they should be very limited. Plants need occasional sprinkling in the early morning and gentle watering once every two weeks. Watering is most beneficial during bright, sunny weather. During 1-2 months in late winter or early spring, the plants should be kept in slightly drier conditions and only occasionally sprinkled. But this orchid is a cool thriving plant.
The Blue Vanda is a plant with moderate thermal requirements. In summer, the average daytime temperatures are 24-25 ° C and the night 18 ° C, with an amplitude of 6-7 ° C. In spring, the average day temperature is 27-29 ° C, night 16-17 ° C, with a daily amplitude of 13-18 ° C. In winter the average day temperature is 22-24 ° C, the night 7-8 ° C, which gives a daily difference of 13-16 ° C. In crops in Chiang Mai (Thailand) plants adapt to winter temperatures around 6 ° C higher than it is due to climatic data.
Cultural information should only be used as a guide, and should be to be adapted to suit you. Your physical location; where you grow your plants, how much time you have to devote to their care, and many other factors, will need to be taken into account. Only then can you decide on the cultural methods that best suit you and your plants.