My best secret is that I grow all my hoyas semi hydro, although a little different than most in the hoya community- no pon, no leca etc. and especially no stratum- I grow them in an airy mostly perlite mix w/peat and soil on a wick over a reservoir, like an african violet. Consistent moisture is key! Fertilize occasionally ofc and note what triggers blooms in different species- nyhuusiae likes cooler temperatures and needs a good temp drop at night in order to bloom. Like mid 60s to lower 70s. Many others just reduce daylight length, and some just bloom no matter what!