Vanda Harkana Tkatchenko

[Ale_V]

Good morning, everyone,

About nine months ago, I bought a Vanda Harkana Tkatchenko. At the time, it was potted in sphagnum moss and bark in a pot with plenty of ventilation holes.

After blooming, I repotted it into a self-watering pot (also with lots of ventilation holes) using the same sphagnum moss and large bark. Everything was fine while it stayed on the windowsill, where it got filtered light through the curtains in the afternoon.

With winter approaching, I moved it to my greenhouse, worried that the dry air from the heating (humidity dropping to 40%) and the low light levels might harm it. It’s been there for three months now. Unfortunately, I’ve realized that the situation has worsened considerably. While the leaves are growing faster, many roots have died.

In the greenhouse, the humidity is at 90%, and the plant receives about 3.46 DLI of light (12h @ 80 µmol/s/m²).

Since I can’t manage fully aerial roots due to the watering frequency required, what are my options?

Additionally, if 40% humidity is acceptable (temperature goes from 22C maximum to 14,5 minimum at night), I’ve now set up a grow light on the original windowsill. I could provide even more light there, specifically 10.76 DLI at the point of highest intensity. What do you recommend?

Thank you very much!