Sharon I loved your article. I wish I knew about "have mint will travel" if you plant it in your garden. Even if I did I wouldn't have believed it.
Well I planted my apple mint under the stairs. It managed to get across the footpath and spread through out my garden - no mean achievement. At first, I called it my new ground cover and thought it charming to have a herb cover.
Today as I mulch my daylilies as they finish flowering, the piles of apple mint that I have pulled out are everywhere.
Even in areas I thought I have done last week the runners are already speeding past. Sigh