Teasels are a great addition to the garden,  those that crave architecural gardens will love this plant as it privides structure to a garden. However for me it is about the wildlife the plant brings to the garden, the flowers are very attractive to bees, aphids are drawn to the plant, which in turn brings ladybirds, so if you have Lupins, plant behind at the back of the border, the ladybirds will then graze on the Lupins that readily attract aphids themselves.  If the flower heads are left after flowering, goldfinches will feed from the seeds.

Teasels will grow extremly tall, almost 2 meters in height. The foliage itself has spikes so be very careful when handling. In the picture above they can be clearly seen. The spikes that grow up from the plant also have spikes, so be warned. 

Teasels are biennials so new plants will appear around the base of the parent plant, these can be left or moved as you require. Teasel should ideally be planted at the back of a border due to its growth height.