Cattleya dowiana help request

[smweaver]

Does anyone on this site grow Cattleya dowiana? If so, could you please give me an idea of how big the plants have to be (number and size of pseudobulbs) before they're considered flowering size? Also, does this species produce a large and noticeable sheath when it flowers (like mossiae's), or does it produce a more abbreviated (or maybe nonexistent) sheath? The reason I ask is because I've had two plants of this species for a few years now, and although they're easy to grow and produce multiple growths per year (one plant currently has two leads, and the other has three), I have yet to see any blooms. The leaves on my plants' newest growths are approximately 8 inches long by 2.5 inches wide, and they're growing alongside my vandas and aerides (which, I assume, is adequate light since those plants actually cooperate and flower!). I keep telling myself each year that I'm going to try and get rid of them because of (for me at least) their reluctance to bloom. They get hot, wet and humid growing conditions in very bright light during the summer, followed by cool and dry winters when they receive direct sunlight throughout their dormant periods. Any ideas of what I might try to get them to flower? Thank you!

Steve