|For the last five years I have been growing what I assume is 'Salpiglossis Sinuata' with much success. I purchased the seed from Stokes as Bolero Hybrids. I germinate and grow under flourescent light. When I move them into 3 1/2 x 3 1/2 pots they move to the greenhouse. From there into the ground outside. As young plants, and after the first transplant, and now in the ground an occasional plant will die. Slowly a plant will begin to wilt and look stressed. From the ground level, the stem an inch below and above ground, begins to look soft and dark colored; and if left it will begin to rot. Of thirty potential plants, so far this has occured to one seedling, two at first transplant, and as of now, five of the blooming plants, and it shows signs of continuing. When transplanted into the ground all had excellent root development. Is this soil, insect or disease?