For a calming yet eye-catching note, you can’t better the bold, blue-leaved Hostas, and we’ve assembled 3 of the most striking and sturdy. 'Blue Mammoth' forms a hefty 3′ clump of heavily puckered, light blue leaves. Hosta sieboldiana 'Elegans' stretches out puckered, gray-blue leaves into a dramatic clump 4′ or more wide. Hosta 'Hadspen Blue' forms a mound of rich, powdery blue leaves. The Moody Blues Collection includes one of each plant.