Mark About all I can suggest is to dig a deep hole in the floor of you greenhouse.... Dewey >Now for my question: My larger titanum will probably hit my 10-foot roof >this time. Is there any way to shorten the petiole without harming the >growth of the tuber? Can't grow them outdoors here - all of my amorphos are >killed by a few weeks of 105+ (40 C) temps. Dewey E. Fisk, Plant Nut THE PHILODENDRON PHREAQUE