Check the roots, either it is not getting enough water, it has roted, bugs got it a rat dug it out, a dog peed on it. too much sun. wrong soil, to much fertilizer, not enough fertilizer at the right time. It has gone dormant. etc etc. I can't see your plant dig it out and start over, they are summer growers where I live and start to flower in Jan. many of them still flowering depending on the species. Mine as flowsered a set seed already. Glad to help if you give me more inforamtion. There are very sharp people on this forum, Species name will be of help, if purchased at home depot, or any of the like stors, or purchased recently, it may have been a sick plant when you got it. If planted in situ, the soil may be sick. It is a tiny little plant in a four inch pot, it just didn't have room to grow and not enough new mix for it to last a year. It's a crap shoot with the information that you provided.