I have two curtisii (and a third I am trying to rescue from the dreaded Lowe's overwatering). I have an old one I inherited that has very thick leaves. The other one I have I bought less than a year ago and it has much thinner leaves. I treat them both the same but I will say the one with thicker leaves seems to handle life a bit better. Anyway...I have them both planted in really quick-draining soil mix. I water all the way through and let them dry completely before watering again.

Hope that helps.

Thanks. My soil drains very quickly too, but the problem is, they are in a small hobby greenhouse outside for the summer. Temps are over 100 inside, and I have vents and the door open! There's a fan blowing all the time too. I think it may be getting too hot for these guys. My other hoyas love it and grow like weeds. Humidity is up around 75-90% which is ideal for them, but curtisii I think wants it a little cooler and less light. Hopefully in a few months temps will start to lower, and by October they'll all be brought inside. Right now though, it's a struggle growing him.

According to sources, the origination for curtisii is Malaysia so you would think it would love the heat/high humidity. Share if you figure out something helpful!

My rescue is outside. I was hoping it would allow it to dry out and stabilize before I bring it inside.

Hi William,

I haven't grown this in a while but kept mine on the dry side when I did. But I'm remembering a friend from my Indoor Gardening Group, who grew this indoors to bloom & I think I recall she used a sort of improvised terrarium.

I expect a Zoom Mtg of that Group tomorrow night; I'l try to ask her if she attends.

In the meantime, quoting from https://www.rareflora.com/hoyacur.html, which also seems to be the known & reputable Nursery called Gardinos:

"HOYA CURTISII

This hoya is a slow grower in the beginning, but when it takes off it gets to be a very full and healthy looking plant. The greenish purple leaves are very pretty and I know you would enjoy this as a hanging foliage plant. The leaves are also small, round w/ a point on the end, and are heavily flecked. The flowers are also pretty special and distinct from the others although I would not expect too many flowers on this species. The fuzzy corollas are yellowish-green and corona is off white with red/pink center. The flowers also smell really nice. This Hoya is native to The Philippines, Malaysia, and Thailand. I do not recommend this hoya for the beginner just starting their Hoya collection, although it is easier to grow than many believe and grows well once it is established.

H. curtisii likes filtered light and to be kept a little on the dry side. Water it once a week in the winter and twice a week in the summer. Protect from temperatures in the mid 50's F and colder."

Hey Popmoma, can I bust your chops (teasingly, of course) 'according to sources' & who might they be, are they your secret sources???

I may have to charge you a couple of Curtisii cuttings for this reputable & sourced info. (just playin' w/ ya). ;>)

I have a big pot of Hoya Curtisii that I got from Lowe’s. It almost died because I left it for two months. Right now it hangs inside my greenhouse along with my other hoyas. Seems to be recovering. It loves warm and humidity which my greenhouse gets.