When starting seeds it is best to soak them in warm water over night. Do not plant them too deeply and be sure to keep them warm and moist. Some literature states that they need light for germination. However, one should have good luck as long as they are not planted deeply enough to rot. If sprouting in the cooler months use a heating pad underneath and plastic wrap on top to keep in the warmth and moisture. I actually use a large plastic container with a clear lid to keep them warm and moist and bring it inside to a warm part of the house. Do not let the seeds dry out … frequent mistings of water will help. Also, do not plant the seeds too deeply. My rule of thumb is to plant them pretty shallow with just a light sprinkling of soil on top. Many people have great success with sprouting them in between sheets of damp paper towels and then putting them in soil.
As the plant grows older the lower stems will form a corky, looking, outer covering, hence the name … corkystem passionflower.
If you love butterfly gardening plant some corkystem passionflower and the butterflies will find it. In my garden the zebra longwings flutter around by the dozens between their passion vine and the many firebushes and lantanas I have planted.
You can buy corkystem passionflower seeds here at my Ebay Store.
I also sell corkystem passionflower start plants here.