Mark, They flower in the fall when the day length shortens after summer. This is also when they produce their tubers. Mine never puts on a great display of flowers but just a few here and there. Nhu On Fri, Nov 11, 2011 at 12:57 AM, Mark BROWN <brown.mark@wanadoo.fr> wrote: > > Funny that oca should be mentioned as mine flowered for the first time > this year. > Is this a rare occurance? >