RHS Award of Garden Merit.
A large, easy growing Hosta, 1m height and spread with large blue-grey-green/glaucous puckered round heart shaped leaves. If that wasn't enough there are also spikes of violet/white flowers in the spring.
Reasonably slug tolerant, grows best in good soil in partial/semi-shade or full shade.
Hosta 'Big Daddy' 1 litre €6.95
Anna reg, CC BY-SA 3.0 AT, via Wikimedia Commons