Why only one or two flowers on phal spike?

[Daenerys]

Thanks guys! The comments about sequential bloomers make a lot of sense.

And you're right Camille, I should have added the links to the threads where these came from. I quickly grabbed these from the first two pages of the phal forums on here, and I guess the 'insert image url' function doesn't make a link back to the source.

[The Mutant]

They're great these knowledgeable people, ain't they?

I learned a thing or two as well even though I couldn't contribute to answer your question.

p.s. love your username d.s.

[NYCorchidman]

Phal is considered a "low" light orchid. Yet, they require fairly bright light to flower well. No direct sun, but very bright light will ensure high flower count.

Lower light, lower flower count.

I have typical large flowering phal and I have average of 8, 9 flowers, so that's not too bad I guess.

Also, this has already been mentioned by Camille, but the pictures you posted, except for the white one, tend to have one or two flowers open at a time, but they continue on flowering for a long long time.