Graveolens means strong scent in Latin. I can attest to this powerful scent, which is not all that pleasant. I know what it smells like to me, but I am unable to reveal that smell on this site.
Hoya graveolens grows in an area of monsoon with annual rainfall of 2100 mm and an average temperature of 27.4° C (81° F). It was observed flowering in Vietnam from April to May and from March to May in Thailand.
Hoya graveolens was found on three karst hills in Kiên Giang Province, southern Vietnam. I had to look up karst and it means landscape underlain by limestone that has been eroded by dissolution, producing ridges, towers, fissures, sinkholes, and other characteristic landforms.
Hoya graveolens was first described by Arthur Francis George Kerr in 1920. Kerr was an Irish medical doctor who is best known now for his botanical work in Thailand. Many plants have been named after him including Hoya kerrii. The first flowers beginning to open below:
Hoya graveolens was thought to only be endemic to Thailand limited to the coastal areas in the proximity of Sriracha where the original specimen was found. In 2007, 2008, and 2009 it was found in Vietnam thus extending its distribution 500 km eastward. Below the buds of Hoya graveolens:
Hoya graveolens came to me as a cutting from Aleagarden in Thailand in 2015. It took around two years to bring into bloom with considerable frustration along the way. Here are a couple of photos of the rather nice foliage of the plant.
The secret to growing Hoya papaschonii is to grow it primarily in sphagnum moss and always keep it damp. I killed this plant so many times when growing it in soil based mixes; the roots would just rot. So far I can’t seem to hurt it in sphagnum even when I soaked it.
I had so many Hoya papaschonii seedlings that I thought it would be cool to try a couple in hanging baskets to see what they would look like. It is a work in progress but here is what they look like so far:
Hoya papaschonii looking like this is Vermont? Who would have thought it possible – not me that is for sure.
We move from Hoya lockii right into Hoya papaschonii because their requirements are very similar. They both lose their peduncles after flowering and grow very well using sphagnum moss as the primary potting mix ingredient. Here is a photo of six H. papaschonii flowers on one peduncle: