I moved some lemon balm in front of Lucifer (crocosmia) this year and it worked well. The balm is strong enough to support most of the crocosmia, although I did cut back those that were growing horizontally.
Let the thugs fight it out
Looks like a good idea! Will be curious to see if there is a winner.
Hmmm... I kinda like that!! I love the fact that you let your more "agressive" herbs/flowers duke it out! It makes a stunning combination.