Oooh, that makes me think of a question. My mum bought one of my sons Dahlia seeds for Christmas. They're all happily growing away in a propagator - phew. Anyhow the question is, will these produce normal Dahlia tubours or are they different sorts of Dahlia? I've only ever grown Daylias from tubours before. You sound like an expert (and I don't blame your wife for a having a problem with them being inside but then my husband objects to my sick chickens wandering around the kitchen so each to their own!)
H