I just planted two hanging baskets of black-eyed susan vine (thunbergia alata) in yellow and white (mixed baskets). I soaked the seeds for about 12 hours before planting. The seed germination rate was very high and the baskets will be quite full:
You can get fresh black-eyed susan vine seeds here.
With an eastern exposure, the plants are growing fast. At three weeks the tendrils are starting to reach for everything in sight – I’m going to have to hang them in a window soon or they will grab hold of my window blinds!
I love thunbergia indoors and out. This vine doesn’t really need to be ‘trained’ to climb – it will hang from a basket or climb a trellis with no coaching at all. Here are some photos of black-eyed susan vine I planted for outdoors this summer: