I received Hoya paulshirleyi in an ill-fated group order from Thailand in September of last year. The roots were completely rotted off so I took several cuttings to see if I could salvage anything, and I ended up with two plants. Below the first flowers of the plant:
Now that we have touched pot, soil, and watering, it’s time to talk about light and humidity. Hoya curtisii will grow well in full sun or very little sun. It is pretty adaptive. I flowered this plant the first time after having it exposed to full sun out of doors for a full summer. The second and third time it flowered just as the days were beginning to lengthen in late February/Early March indoors in a northwest window with almost no sun.
There is no doubt that Hoya curtisii grows best in high humidity, but it will muddle along with relative humidity as low as 40%, but expect a lot of dried out growing tips. My plant lives year around now in my house witch gets pretty dry in the winter time. I think think this Hoya would like to live in a bathroom where it would get extra humidity from people taking showers.
Now that we have the soil and pot figured out, how about a watering schedule? I have found the schedule should be thrown out; this plant needs to be only watered once it has dried out. I’m a person who likes to water all of my plants on the same day each week, but with Hoya curtisii it won’t work. Water only when dry, then soak the plant, and start the process all over again.
There is much advice on the internet about how to care for Hoya curtisii from never let it dry out to keep it dry all the time. I can only say what has worked for me. The plant needs a relatively small pot where it can literally live for years (Mine has been in the same 4 inch pot for 4 years!). The soil should be relatively free draining, but also have some water holding capacity. Peat-based potting soil amended with 25% perlite should work fine.
Here are a couple more photos of the peduncle with 14 flowers on it that I picked before cutting the plant up into more than 30 cuttings. They go on sale this week on eBay. My seller name is erbtarzan24. I know that the name makes no sense and I would like to change it, but that is impossible. The name comes from my childhood when I read all of Edgar Rice Burroughs’ Tarzan books, and there were 24 of them.
I am asked for cuttings of this plant more than any other, and I only have them available for sale once every two years. If you really want one of these one in a thousand seedlings, this spring will be your only chance for at least two years. They will begin being for sale on eBay this week or next; regrettably they will only be available to ship to U.S. addresses as international shipments are too expensive and complicated for me to take on.
I don’t like pushing my wares here, but this hobby is expensive for me, and these sales will help to keep me going and doing what I love to do. Here are a couple of new photos that I took of a bouquet that I picked before chopping up the plant: