Conditions for orchids growing well, or just remaining healthy, not to flower?

[HiOrcDen]

I have been growing my orchids for close to two years now. I have about 60-70 of them now, the great majority outside in shade houses.

So far only six or so have actually started flowering. Most I have purchased have been specified as 'mature', and some as 'blooming size'.

It has just occurred to me to wonder, whether there might be conditions for an orchid to be good enough to remain healthy, or even to grow vigorously, without being good enough to flower, and yet the health of the plant not diminishing.

Is this at all possible? If a plant is remaining healthy, but growing very slowly, or if a plant is growing quickly, in either case can conditions not be ideal enough for flowering?