The plant is edible, however the roots and leaves test best before the flower blooms.
The flowering shoots can be eaten too, in a similar fashion to asparagus. Either eaten raw or cooked. Also, the flowers can be eaten and go well as part of a salad.
It’s around 77% water, with the remaining 19% being carbohydrates, and 3% protein. When eaten, it’s a good source of fibre, vitamin C, potassium and manganese.