Frangipani is a 'common name' for Plumeria (was the person who gave you the cuttings an Australian by any chance?).
Cuttings are a really good way to get some of the more spectacular colour variants. There are heaps of specialist plumeria nurseries on the web.
For establishing cuttings I find that regular potting mix can hold too much water with resultant root rot. When I'm striking cuttings of Plumeria I use a 50/50 mix of washed sand with regular potting mix. I've never tried from seed.
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