I ask this question because my D. intermedia 'Cuba' plants have flowered about 8 times now, with average of 5 flowers per stalk. That's 40 flowers, for those who hate math. Now, I just watched a D. intermedia 'Cuba' flower open part of the way, and then close. It was never fully open! I sat there for a 30 minutes watching it, because I knew it closed quickly. Here is the largest the flower opened. Does anybody elses plants behave that way?