I don't know that either, Rick. I haven't grown the Benjamina for at least thirty years. The one I had was at least 15' tall and it was growing inside the house. The ceiling in that great room was 24'. I hated that plant for the fifteen years I grew it. It was leggy and dropped leaves constantly, even though it never changed position in all those years and got lots of bright light and regular watering. My lyrata (Fiddle Leaf) and maclellandii 'Alli' (Narrow Leaf) Ficus plants are not finicky and just don't drop leaves.
