Very exciting to hear about the Red Robin crosses! Rosella Purple is a favorite of mine, so by all means, make it smaller so I can keep one on my kitchen windowsill 'til Christmas.
Darren, most of what you say normally goes right over my head the same way a 747 does (super fast and way, way, WAY up) but I think I actually understood this post.
Am I understanding correctly, that 1 in 16 seedlings from the F2 should be micro, but only 1 in 64 will be micro and determinate? Is there any way to tell if it's determinate or indeterminate other than letting it just grow?