will*law

It depends on your area and the seasons. You want to do a trunk chop to a ficus when the tree is growing vigorously. For me, that ends up being twice a year - during the summer, and about now after everything has re-aclimated to being indoors under metal halide lights. The only thing that I find indoors is that putting a clear plastic bag over the chop helps keep humidity high. In my experience that seems to help quite a bit. A humidifier may do the job also.

Be careful with the variety. Benjaminas are somewhat unlikely to back bud, although I have had success even with 'Too Little' which others had said is impossible. It is really, really important to do it during vigorous growth.

Good luck!

Will