Welcome, Kickstart! That is a lovely dahlia, indeed! You don't mention what zone you're in, so you should be aware that dahlia tubers do not like to get frozen. I'm in zone 5 (or 6, depending on who you believe) and I have to dig mine up and store them every winter. Although I've also salvaged a few by just bring the pots indoors for the winter. (Those were the ones in fairly small pots that I'd grown from seed.)