George K, that is one beautiful, healthy plant. I will tell you that you can trim it because I took an indoor plant from GA to Florida and trimmed it and when it got too big I planted it in my backyard. It is a lovely, tropical looking plant. It gets huge. It even comes back after any unusually harsh Florida winters.
Did you trim the whole plant? OR the roots, or both?
When I planted it I trimmed the whole plant including the roots that had grown outside the pot. It was huge so it had to be trimmed. It is planted outdoors in a shady area because this is Florida. It has been here about 10 years. Our winter this year made it look bad but it will come back as beautiful as ever. If you keep it inside you don't have to worry about cold. You might also need a larger planter for it (even after trimming).
Yes. They are just filled with water as a resevoir for when it gets no rain or watering. I cut all mine a few months ago and my philodendron is thriving.
Mine is about this large and I do not touch the long roots, just keep watering and it keeps looking healthy.
THEY ARE AIR ROOTS WHEN THE SOIL IS DRY
yes, I cut mine all the time