I love Rudbeckias, especially 'Iris Eyes,' Prairie Sun,' etc. They are listed by sellers of seed and plants as bi-annual, perennial, etc., depending on where you do your research. Some sites say they reseed but others say if they reseed, they may not be the original variety. My question really is if a seed does not come true in the garden, how can one buy seed that is true, for that variety? Do any of you start these particular Rudbeckias and if so, when? Can you winter sow? Thanks.