Posted: 31/03/2015 at 12:49
Mine seed like mad but Jack Frost was only Jack Frost in the first plant. They become less like it with every generation and after about 20 years of seeding on they're just a bit variegated.
Much as you'd expect really but if you want a colony of Jack Frost, propagate as blairs suggests.
I prefer the species tbh, not that keen on a lot of variegation