Finally! After all this time, I finally got an open bloom on my red/black seedling plant:
The third photo is with flash. Bloom is not as great as I had hoped, but not too bad. The heavy daily rains we suddenly started getting lately was causing buds to drop, so I moved this plant (plus some others) onto the lanai behind a screen, so now in mostly shade but at least protected from the rain. This bud was only about 2/3 the size of the last ones, so I know I can expect larger flowers in the future.
While waiting for this one, I had a couple other seedlings (from a different seed group) bloom.
This one:
And this one:
There was also this very plain pinkish-white that bloomed, but right now I'm more excited about the doubles.