Mine usually start flowering the second season after germination, although I have had some flower the first season while still small seedlings. When seedlings send up a flower stalk I cut them off so energy goes to leaf producation instead, then they send up lots of leaves and the plant ends up growing real bushy. I have had some send up flower stalks as early as February or March, before they go outside, and others don't start flowering until late spring/early summer and then will flower all season into fall. I don't know if this is normal for them in the wild, to flower all season, and I am not really sure exactly what triggers them to flower. I have heard people say they die after flowering, but this has not been the case with me. I had one survive four years and it profusely flowered the last three years and seemed to do just fine. It died over winter. The roots were coming out the bottom, so I don't know if that had anything to do with it failing or if it was just worn out from energy spent constantly flowering and producing seed, haha. The three pots I have now contain plants I germinated from seed last year and they are 12" pots, so we will see if they will survive longer than four years.