Culture for Den brymerianum and Den Harveyanum
 

I have several Dendrobium brymerianum placed at different positions in my yard where they get different condition, but none of the seem to produce many flowers. I let them rest and all. They are all growing in strong light should I move them to shade

I can't help you with any concrete advise. Maybe you can look up Marni Turkel's article on the culture of den. harveyanum. She is a very successful grower, and that article may have all the answers you need.

How large are they?

Do they receive a chill in temperature going down to the mid 50's F?

Have they been around often?

They are blooming size. and all are mounted on manzanita wood. I have had them 2 years now. I have searched for them a really long time, and they are not easy to find. I actually just moved on to a shadier location today. I did check out Marni's site thank you I will definitely try the grow or die technique on one of them atleast

Both needs inter-cool dry winter rest, down to 50-55F range for at least 4-6 weeks. Judging from where u are, it might be a little too warm for it to bloom, unless u keep it in ur air condition room during winter night.