I have a P. vitifolia that grows like crazy during the summer. It's always covered in blooms and really looks pretty. Lavender Lady, and Incense are also heavy bloomers for me. You'll have to keep wrapping them around the obelisk because the vines will be well over 5' in a short time. I have morning glories growing alongside some of my passies so there's always some color. The MG vines are light and thin and they don't seem to interfere with the passiflora's growth.