Well the recent winter was pretty bad for the bananas, so I cut them down to ground level, and new shoots are coming up. Great (although that means no flowers or bananas this year).
The problem now is that I have a shoot coming up in the lawn! I can easily cut that back, but it will keep growing. Banana 'trunks' are just leaves wrapped around each other. Even if I cut the shoot, the inner leaf will keep growing. So how can I kill this one shoot but not kill the entire plant/clump?