Yay for better late than never. I planted some turmeric roots in June I found in a grocery store. Checking online revealed they take up to a month to germinate, if they haven't been radiated like a lot of ginger is. After a couple months I reckoned they had been nuclear sterilized.
Two days ago I found that two of them had sprouted. That's a little longer than 30 days! Anyway, they are not winter hardy, and need great big pots. I extended a sunny windowsill by about 18" to accommodate the huge pot, and am keeping my fingers crossed.
Better late than never.
Thanks!