Sorry to be the bearer of bad news, but there is no plant that will chase away mosquitoes. There is a cintronella scented geranium you can grow, but it won't chase mosquitoes unless you sit next to it and rub it's foliage. Not very practical. Lemon grass is a tall, tropical grass used in Asian cooking. It can grow 4 feet tall and is a very pretty and useful container plant. But, it won't chase away mosquitoes.