I have always had a penchant for this wildflower Ageratum with its beautiful composite blue flowers and recently, it proved its worth to me again.
Its flowers not only attracted a Common Tiger but it also attracted two other Plain Tigers. This is triple wow! And these are three reasons, alright I cheated it's just two, for me to keep the wildflower in the garden.
On the other hand, the Cnidoscolus also managed to snag a Plain Tiger to its white flowers.