If I can pull this off, flowering Hoya maingayi will probably be my flowering highlight of the year. As far as I know, I will be the first to flower this plant in the U.S. There are almost no flower photos of this plant online other than a couple from Surisa Somadee in Thailand. Fingers crossed that this will happen as I lost my first set of buds on this plant. I have two sets of buds, and one of them is in probably the most inaccessible spot as far as photographing that I have seen in my Hoya keeping career. I would have to cut several leaves out of the way to get flower shots, which I am not willing to do. Fortunately, the other set of buds is accessible.

Quite frankly, I’ve never thought too much of this Hoya, and almost got rid of it until I saw what it is capable of. Over the summer it put out this giant leaf that was altogether quite beautiful, and because of that leaf, I decided to keep it around. The plant is so covered in sulfur right now that I don’t even want to show you what the plant looks like, but here is its flower from this morning:

Hoya rigidifolia is probably a Hoya that would mostly appeal to serious collectors. The foliage is not the most interesting and with the flowers only lasting a day, there would never be a big demand for this plant. I found it somewhat difficult to cultivate, but others might find it easier. While I can’t give it an enthusiastic recommendation, if you are given one, or find it for a bargain price, it might be worth giving it a go.

This species was described in 2019 by Sri Rahayu and Michele Rodda in an updated checklist to the Hoyas of Sumatra.

Hoya rigidifolia is only known from the lowland forest of Pulau Siberut, southern Sumatra, Indonesia.

The flowers of Hoya rigidifolia are exactly like most flowers in the Finlaysonii Complex and last for about 24 hours. There was no scent at all. Here is a photo before the blooms have had a chance to reflex:

The leaves of this species is what sets it apart from other Hoyas in the Finlaysonii Complex. While they have none of the intricate patterns and venation of most of the plants in the complex, they do have these unique and very stiff leaves.

I grew it in a 5 ounce clear, plastic, punchbowl cup so that I could more easily see when to water the plant. It grew slowly, but steadily and finally put on a peduncle after about a year. The first buds aborted early, but the second time they made it to maturity.

I can’t lie; Hoya rigidifolia was a little more challenging than I believed it would be. I started it over a couple of times and finally got it right on my third try. It was very susceptible to pests and root rot. I finally ended up growing it in coconut husk chips, and that is where it did the best.

Today we begin a discussion of Hoya rigidifolia. This is a plant that was not on my radar until a very kind collector named Mandy Lin sent me a small plant in the mail thinking I might like to try it.