Hi Margaret, sorry for the late reply, but here goes..I was testing the limits of my Hoya, almost regretted it. We had a rather long Spring cool down, and Hoya kerrii variegata was dropping leaves, taking too long to perk up.
Thankful now, that even though it is heat wave, it seems this is its favored weather. I have learned now also to keep spraying the vines of Hoyas during watering time, aside from the root zone. It is just so dry here for them. I am not going to cut back anything for now, just got to let new leaves form.
Hoya kerrii variegata
Very few leaves remaining in June 2018

finally saw some promising new leaf growth as July's hot temps march in:
Finally the new leaves maturing nicely, what a relief! I am not concerned right now if it cannot make any blooms, all I want is for the plant to continue on:
Hoya carnosa 'Krimson Queen' also took its time perking up, but it is nicely blooming again in its one and only peduncle. That is good enough for me, it is quite a challenge to grow anything right now in our current heat wave weather!
Hoya shooting stars, still grown indoors, repositioned near our glass sliding doors, it has adjusted quite well. I do not need to grow it in standing water now, seems well acclimated now with its set-up. Been blooming on and off this summer. quickly dumping old blooms when new buds form quickly on same peduncle. And happy to see it forming a new pair of leaves and a new peduncle. It used to be very reticent, only one peduncle at a time.
29June2018
24July2018