My dad has some of this in his garden and it's crazy! It grows and multiplies so quickly! It can easily take over the whole garden if it's not managed.
I'm not even sure where he got it from, but I'm assuming he got it in a small pot from the nursery just out of curiosity. But the herb loved the shade behind the house and has literally blossomed.
I do dry some of it to use in the kitchen, but I don't use it that frequently. I need to start exploring the medicinal uses of this herb because there is just too much of it in the garden.