Leo: I've been meaning to write about a similar problem I'm having. I got one of the tubers of Impatiens flanaganae and have been struggling to grow it. I've tried in the greenhouse under shade cloth, outside in the shade. No luck. Do I really need an air conditioned greenhouse to grow this. Arnold Cooling NJ On 07/21/13, Leo A. Martin wrote: I have posted before about my Sinningia tubiflora.