Thank you to all.
It's a little difficult for me to give informations because I'm not good in english. But I try:
In my growing conditions, light is moderate, like phalaenopsis for example. fertilizer is normal (400µs of 6-2-4 ), lots of dolomie, humidity 60 to 70%. temperatur min is 14°C and the max in summer is 33-34°C but it's too high for it. It doesn't like that and grow better to 18°C beetween 25°C.
I add volcanic rock (pouzzolanne) to my standard mix because I think the roots don't like to be too long wet.
It's very slow to grow.
The fragrance is difficult to describe... floral with a touch of spices.