Yes, I forgot to mention that the water here is neutral to slightly acidic, and soft with low TDS. And humidity is high. Thank you, Kim, for adding the info. I'd like to add, about the issue of humidity. Besides misting or covering, perhaps having shorter cuttings put in tall cups might also help if the humidity in your area is not enough. Pictured below, I've tried taking very short cuttings (two leafy nodes) and placing them in 7-inch tall transparent cups. There's a hole drilled an inch from the bottom of each cup for overflow of excess water. I put this batch under full sun, with much success (in December, when the weather is nice and cool in Taiwan, any other time the cuttings would be fried under the subtropical full sun here I guess). As everyone says, hope you'll try different methods and good luck! :-) Hardy

Self-heading means it grows on a trunk. Other philos grow as vines. P. Selloum, the common nursery philo, is a self-header, or meconostigma philodendron. You can propogate them by separating the offsets at the base. You also cut the tops and root them, but I have never tried this myself. Here is a link that might be useful: Self-heading philos

"Selloum" has been sunk into synonymy under Philodendron bipinnatifidum. Same plant but the name that is considered the correct name was published years before the name Philodendron selloum which makes it the correct name. The species is a member of Philodendron subgenus Meconostigma and is not always easy to propagate. The subgenus Meconostigma contains all the Philodendron species we commonly call the "tree Philodendrons". You can do cuttings of the stem (which is not the support for any single leaf) at the base of the plant so long as there are nodes and aerial roots present. The easiest way is to simply top the plant above a node and take all the roots with the top cutting. That plant can then be potted and the old stem which is now leafless will eventually produce new leaves. The stem is the central axis of the plant and provides support. The petioles that support the leaves grow from nodes along the stem. Unfortunately collectors often call the petioles that support the leaves the "stems" which is incorrect. If you cut enough of the stem then you can divide it and plant the pieces on their sides and they should start new plants. In time the plant should produce offsets around the base of the stem which can easily be divided and started in a new pot. Since the plant is commonly produced via tissue culture it is often inexpensive in a nursery or department store. Generally it is faster to just buy another plant but if you are like me it is more fun to grow your own. The link below may help Here is a link that might be useful: Philodendron bipinnatifidum

You can cut the top off and it should resprout from the base. The top half should also root easily, just remove most of the leaves. Leave about 3 or 4 of the newest and cut the rest off. The base will resprout, probably with about 2-3 new growing points that will all grow large eventually like the original plant. Eric Orlando,FL z9b/10a