Hi Carol, this species is in section Dendrobium, ie 'nobile-type.' I haven't grown this one personally, but the culture for most of these is pretty similar with some minor variations of temperature tolerance, etc.
IOSPE says this one is hot to cool growing so I bet it's a good one for Florida.
When the weather is warm or hot, water and fertilize it frequently, don't let it dry out too much between watering. Since growth is so seasonal, these plants need a lot of nutrients to put on growth quickly in the warm season. Most of these types like to be mounted or else potted tight with fast-draining media, they don't like soggy feet.
When weather gets cooler, slow down a lot on the watering (don't keep it bone-dry) and cut out the fertilizer. A lot of people use Halloween or Thanksgiving to Valentine's Day as a rough guide for the rest period, but I don't think it matters much as long as it coincides with a 1-3 month cool period.
A lot of these species can tolerate temps down to or below freezing as long as they're dry, but I would give it shelter once it gets into the upper 30s. Cool nights along with dryness are what seem to stimulate heavy bud production; a few weeks of night temps in the 50s or below is ideal but probably not essential.
Light intensity in the natural habitat is usually highest in winter because the trees drop their leaves in the dry season.
So to recap: cool, dry, bright winters and hot, moist, nutritive summers should be the way to go. Good luck!
--Nat
Den. pulchellum
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