I'm only familiar with Asarina scandens, which I dearly love. They will do ok in gallon pots, all by themselves (single plant to a container), but I haven't had a great deal of luck with them in combined plantings. Not sure if that's just me or if they just don't like company. Mine did best planted in a large container with only Asarina in it.
There are two different plants in this photo.
I tried putting one in a mixed planting in a half barrel, and it really didn't do much. Had a Pink Flamingo rebar sculpture in the barrel and really wanted the Asarina to climb up it, but it didn't want to climb and was barely visible in the planting.
