Lime Sulfur Treatment

How often should lime sulfur be used to treat trunk on a Bougainvillea?

Bougainvillea is not my cup of tea but I remember from the stream with Juan Andrade that it really is prone to rotting from the inside out and if I am not wrong, they suggest wood hardener instead. Additionally, is the white from lime sulfur the look you’re aiming at in a broadleaf?

Eric Wigert gave me advice to utilize the root of a bougainvillea into the design rather than fighting it.

What are you trying to treat with lime sulfur?