Neither my S. purpurea nor my S. purpurea hybrid seem to produce nectar in their pitchers, they're just waxy and completely dry. I always figured this was typical for the species. However, yesterday I felt the inside of another S. purpurea at a nursery, and found that it was producing copious amounts of the stuff. Why is this? Do some plants just not produce nectar? Does it have to do with where the plant is originally from?