That would be me, "the source". And it is true, my "mother plant" my original acquisition continuously grows leaves from 6-9 inches (15-23cm) long. I have propagated this "mother plant" several hundred times, most from root cuttings, some from leaf cuttings. I grow them in undrained plastic pots and frequently renew the water level so it is kept near the top of the pot. I simply drain off the free water first and then open my hand so that the plant fits between my fingers, I then upturn the pot so the plant, roots, media and all slip out into my hand. I can then search for any roots that have grown to be visible on the outside of the rootball. I then trim off 2-3 inches (5-8cm) from the largest diameter ones. I then return the "mother plant" to her pot. She and now her sisters have never shown any obvious distress at this procedure. Now I take the root pieces and cut them into 1/2 inch (1.2cm) pieces -- I once buried them under a thin layer of media and waited -- this often took several weeks to a month to show any growth -- now I prepare a smooth surface of dried/ground Sphagnum that has been soaked and rinsed in purified water and place the pieces out on this bed of moss. I then cover the surface with a layer of clear polythene plastic to seal humidity inside. Using this modification I often see nearly 100% of the root pieces initiate one or more plantlets within 1 week. I now have 25 "mother plants" and am really getting into propagating this delightful sundew.