Hi quinn, Its pretty hard to tell why the leaves would be droopy? I lost over half of my Var. macrophylla leaves due to cold damage. I had no idea that this hoya was that cold sensitive(at least mine is). I put it in the garage since I didn't have anymore room inside the house. It ended up being in the garage for 10 days and we had very cold temps, the garage probably got around 40's inside. I only have about 1/3 of leaves on the plant left and I'm still waiting to see if its going to fully recover. Over half...if not more of the leaves started to turn yellow and fell off. I'm not sure if what you're describing is from too cold since your leaves are not yellowing. It does get that pretty red edges when its in bright light. Keep an eye on it and if you can, see if you can tell what temperature it gets near that window at night? You can always check the roots and see if the soil is overly wet or too dry? Good luck!

It doesn't actually look droopy. They just feel softer and more flexible, rather than stiffer, which is what it was like before. At the lowest, the temp by the window gets in the low 60s, but I'll double check. The thermometer has a memory function that shows the min and max temp recorded. The leaf that did fall off yellowed first, but I didn't think anything of it, since it was the oldest one and right at the soil line. Soil seems good to me. Maybe I am worrying over nothing?

Oops sorry about that, I guess I misunderstood. If the leaves feel softer not as flexible, I'm sure its just fine, mine has some leaves that are the same way. Especially if your temps stay at 60°...mine got way colder that's why I had so much damage. I would say your hoya is probably just fine. Some bottom leaves do sometimes yellow and fall off and is normal.

I had the same problem as Pug...this hoya does not like the cold. I had some yellowing leaves and the loss of growth tips due to the cold, I let my plant almost dry out before watering it too.

Hmmm, I think I might be growing it just a smidge cold. I looked up temperature tolerances on SRQ, and 60 is about the lowest I should go for a lot of the hoyas I have. And subcalva is in the list of hoyas that don't want to get colder than 70! Whoops. Sorry subcalva, can't get my house any warmer right now. It usually stays in the range of 63-68F. And that's warm for my house, because I am on the third floor. The first floor probably gets as cold as 59 or 60, because my thermostat is set for 63 and we're pretty sure it's about 3 degrees off. Happily, the only hoya on the first floor is pubicalyx 'Pink Silver'.

So, we'll just have to keep an eye on those two, and hope they don't hate me too much before spring rolls around. That may explain why the newest growth died back to the node on those two though. None of my other hoyas did that.

Queenfyre, I have some of my plants down to 40 degrees in screened area. Subcalva & macrophylla seems to be ok as long as gradually get used to lower temps.
Hoyas do not like sudden change to lower temps for sure, some of mine loose it's leaves once in awhile.
It could be the plants don't like being in the house in winter due to less humidity beside being cold.