First, I'm not sure that is the correct name for this plant. I've had it for 24 years and I've kept it alive by simple fertilizing, watering and decent lighting. It is starting to look sparse. The trunks have over grown the pot and the tips of the leaves are turning brown. I can't go much bigger in pot size. Any suggestions.
I believe this to be the Tree Philodendron (Philodendron bipinnatifidum)rather than Split Leaf Philodendron (Monstera deliciosa)and it looks like you have a container that will be able to house if for the rest of its life. Once it reaches this size, and maturity, it will only need soil removed and replaced down to about 2 inches each year. I do see signs of overfertilization, and since these are epiphytes (natively, they live in and around trees) they won't require much nutrients to thrive. In fact, less is more, here.
Pruning can be done to larger shoots, as this will force lower shoots to branch out.
Increasing humidity as much as possible will help, as well. Older specimens will appreciate the extra moisture.
Here are some articles that will help:
Thank you for the response. Should I do anything with the roots that are growing outside of the pot? Should I trim them?
No. Those are collecting nutrients, as well, and it will not be necessary to trim them.
tall My tree philodendron is getting too tall would like to cut it down at least 12 inches how do I cut it down or back around 15” so it doesn’t grow so tall Would the leaves come back like a banana tree comes back
Yes, you can cut it back. Then you can pot up the top you cut off and it will root. But some say it's ugly when it grows back.
This plant shaft is 7+ feet tall. Plant has fallen over several times & broken. I have separated shafts and repotted siblings over the years. Live in Austin TX area kept outside in summer, inside in winter. Can the original trunk shaft be cut in half & the upper part be transplanted using the air roots to nourish the plant. After 51 years this plant is very special to me. I await your reply
Yes, you can cut it back and insert the new plants directly into potting soil and they should root.