Hi there! The Prairie Dock that I planted is on its third summer, grows copious large leaves, and looks quite healthy among golden rod and milkweed. It has yet to flower though. Is it common for them to take a few years getting established before flowering?
Your three year old Prairie Dock plant should send up stalk shoots this summer, so keep an eye out for their emergence in midsummer.  If they don't appear this year they will eventually. Prairie Dock is slow to develop and two to three years until the...