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Caryopteris × clandonensis 'Inoveris'

Grand Bleu® Bluebeard

Caryopteris x clandonensis 'Blue Mist'

Blue Mist Barba Azul

Ceratostigma plumbaginoides

Hardy Plumbago, Leadwort

Clematis 'Ramona'

Ramona Clematis

Delphinium 'M.F. Dark Blue Dark Bee'

Magic Fountain Dark Blue/Dark Bee Delphinium

Delphinium (Pacific Hybrids)

Pacific Hybrids Mix Delophinium, Larkspur

Eryngium planum 'Blue Hobbit'

Blue Hobbit Sea Holly

Hydrangea macrophylla 'Bailmacsix'

Endless Summer® Pop Star® Hydrangea

Hortensia macrophylla 'Grenan'

Hortensia Nantucket Blue™

Hortensia macrophylla 'Ramars'

Cityline® Mars Hydrangea

Hydrangea macrophylla 'Variegata'

Hortensia abigarrada

Iris sibirica 'Royal Blue'

Royal Blue Siberian Iris

Iris versicolor

Northern Blue Flag Iris, Harlequin Blue Flag

Isotoma fluviatilis

Blue Star Creeper

Kalimeris incisa 'Blue Star'

Blue Star Kalimeris

Lithodora diffusa 'Grace Ward'

Grace Ward Lithodora

Nepeta 'Balneplud

Blue Prelude Catmint

Nepeta grandiflora 'Summer Magic'

Summer Magic Catmint

Nepeta racemosa 'Blue Wonder'

Blue Wonder Catmint

Nepeta racemosa 'Little Titch'

Little Titch Catmint