Posted: 16/05/2015 at 20:49
We had lemon balm in the garden on the farm when I was a child - after it had flowered and before it set seed Ma would cut it hard back to just a very few inches tall. That would prevent it seeding everywhere. Instead it would soon grow more foliage and look lush and attractive again.
Don't forget, a handful of lemon balm leaves steeped in boiling water makes a lovely relaxing drink, especially before bedtime. Sweeten with honey if liked.