Chelone obliqua

Known as 'Turtle Head' due to shape of pink flowers.

Flowering period:  August to October.
Growing conditions:  Most conditions, including wet clay.
Typical mature height:  24 inches ( 61 cms )
Hardiness: - to discuss further  
 Insect-friendly plant This is an insect-friendly plant which gives bees and other insects easy access to nectar and pollen.
 Piecemeal Plants in Leicestershire