Just a thought - mint of any type planted in the garden is extremely invasive. Your Grandchildren's grandchildren will never be able to get rid of it. I limit my mint - which I love, including catnip for my girls to hanging baskets. Made the mistake of planting mint in the ground only once. It took 5 years of ripping it out to finally get rid of it. Anyway - grow mint/catnip in containers.
Elizabeth - or Your Majesty
Living and growing in Lafayette, La.
When weeding, the best way to make sure you are removing a weed and not a valuable plant is to pull on it. If it comes out of the ground easily, it is a valuable plant. ~Author Unknown