If the root is that massive, there are two approaches ;
I’d get a drill with a large bit and drill numerous holes into the trunk/rootball. Once drilled pour undiluted (commercial strength if you can find it) Round up into those freshly drilled holes. Or, you can cut numerous branches and using a paint brush “paint” Round up on those freshly cut stumps.
The plant will then circulate that chemical in its vascular system.
|