30‑Year‑Old Rubber Tree with Aerial Roots

Your massive rubber tree is healthy—new growth is vigorous. The 19‑inch pot is likely fine; just water more frequently as roots fill the pot. After 7 years, fertilize with a complete fertilizer containing trace elements. Aerial roots are normal on old trees and not a problem. Prune to shape: cut stems back to where you want new growth (just above a leaf node). It won't harm the tree and will fill in the center.