Growing mints has been a real experience. Initially, i bought mint from the vegetable market. Most of the mint stems had roots. After removing all the leaves and using it for cooking, i planted the stems. Even within a few days, nice little green leaves started growing.
The Mints took a real beating this summer. Not only that, the plants started growing prolifically and covered a large patch of the garden. I always picked the leaves and never removed the stem.
The Bad Patch
During peak summer, the mint plants started drying up. I missed watering the plants for only a day and it resulted in a disaster - except for a few of the mint plants, the rest turned black and no amount of watering revived them.
I would suggest those having mint plants in really hot places to grow them in the coolest corner of the garden. Its a bitter lesson I have learnt.