This year the winter has beem warmer than usual so I think this was the reason why I got only two blooms (usually there are more than 10.
By other side, because I'm lazy, I left them in the pot outside for the winter instead of putting them in the fridge.
These Pleione are Pleione tongariro or heatfield...I don't know because along the time I mixed the bulbs and the flowers are similar to each other.