EXPENSE : 5000 RS INCOME : 60000 RS Milk thistle is a heady, spiny plant with white-veined leaves and purple flowers. The seed of the milk thistle plant is commonly used to treat chronic inflammatory liver dis-orders and it is among the top-selling medic-inal herbs. While milk thistle products are easy to come by, this is a great herb to grow at home. It requires very little care and a controlled environment to prevent invasive growth.