seaecho:
Very nice and healthy looking plants! I don't know if you will see blooms on your hoyas this year but I think it might be possible to see them bloom next summer. Watch the stems for little growths; I've heard them referred to as "bloom spurs" but the proper term is peduncle. I've heard some refer to it as looking like a little microphone or a spur and that is where the flower umbels will emerge. When plants are young, the peduncle may be quite small; they grow larger as the plant matures.
These are old photos of a couple of my hoyas where I annotated the parts:
Hoya carnosa .......................................... Hoya merillii
Hoya pubicalyx ..................................... Hoya pubicalyx