I have three indoor towering ficus plants in 12" pots. I was wondering if it would be ok to plant pennyroyal mint (or any other kind of mint/herb) in the pot with the ficus? I know that pennyroyal spreads quickly and has a thick root system so I don't want to strangle the ficus but it would be great to have that fresh mint fragrance and the very green mint leaves in the pot. Thoughts?
