Dendrobium thyrsiflorum

by Sue Rallis
(Gosford, Australia)

Hello, I inherited these 4 plants from my father when he passed 3 years ago. He was an orchid grower and judge in Northern New South Wales. These were his favourites. The problem is although they have grown tremendously, only 1 of the 4 flowers each year, the pink and yellow. The yellow and white his flowered once 2 years ago.
I have read what you have said about light, the are all in the same place over about 1.5 meters. Is there some food I should give them? Should I remove some of the back bulbs.
Any help to get these guys flowering as they should would be greatly appreciated.
Regards Sue