I want my Ficus to get fuller, how do I do that?

Hi & welcome! That can be discussed theoretically or, if you are able to add a pic to the discussion, specifically in regard to your plant.

Ficus take great to pruning but I don't want to give you advice until I see your plant and know how large it is. I am attaching a photo of my Ficus, age 25 years. I couldn't convince the cat to sit in the pot (something she would normally be doing if I didn't want her to) but the plant is 4 1/2 feet tall. I prune the tree and also the roots.




Daisy

Yes, there are lots of ficus, such as that great-looking Benjamina and my 25+ year old Fiddle Leaf with her eight "trunks". She has never been root-trimmed and has been in the same pot for ten or so years. She's had lots of branch-trimming though.

That's a nice plant Ken. What is it doing in the second photo?

I have root pruned mine twice when I was re-potting. The top gets pruned all the time. And turned every time I water it as it only gets light from that window (faces east).

Daisy

The second photo shows the 8 "trunks". This plant started out its life as a tiny, twiggy, seedling (as they all do). I would probably need a jack hammer to dislodge this sweet lady from her 24" diameter pot. The wads of sphagnum moss you might have noticed is my air-layering branches.

Mine was started from a cutting. My father-in-law grew it as a gift to my mother. I think he probably took a branch off his and stuck it in a jar of water - its the way he starts everything.