We have found 36 plants that meet your criteria.

bugle
Ajuga reptans 'Catlin's Giant' bugle Handsome evergreen ground cover £6.99 Buy
aster
Aster 'Little Carlow' (cordifolius hybrid) aster Pretty violet-blue daisies in late summer £7.99 Buy
Siberian bugloss (syn. 'Variegata')
Brunnera macrophylla 'Dawson's White' Siberian bugloss (syn. 'Variegata') An excellent groundcover £9.99 Buy
cornflower
Centaurea cyanus cornflower A vivid blue annual for a meadow £1.99 Buy
clematis (group 2)
Clematis Franziska Maria ('Evipo008') clematis (group 2) exceptionally free flowering £12.99 Buy
clematis (group 2)
Clematis 'Lasurstern' clematis (group 2) Charming lavender blue flowers £9.99 Buy
clematis (group 1)
Clematis 'Multi Blue' clematis (group 1) Fabulous double lavender blue flowers £8.99 Buy
clematis (group 3)
Clematis 'Perle d'Azur' clematis (group 3) Stunning pale turquoise-blue flowers £11.99 Buy
plantain lily
Hosta 'Gold Standard' (fortunei) plantain lily Spikes of lavender-blue flowers £7.99 Buy
plantain lily
Hosta 'Patriot' plantain lily White-margined leaves £7.99 Buy
plantain lily
Hosta 'Wide Brim' plantain lily Dark green leaves with cream margins £7.99 Buy
hydrangea
Hydrangea macrophylla Endless Summer Blue ('Bailmer') hydrangea A profusion of blue mophead flowers £22.99 Buy
lacecap hydrangea (syn. Blue Wave)
Hydrangea macrophylla 'Mariesii Perfecta' lacecap hydrangea (syn. Blue Wave)... Blue or pink lacecap flowers £9.99 Buy
hydrangea
Hydrangea serrata 'Bluebird' hydrangea Distinctive blue (or sometimes pink) flowers and autumn colour £9.99 Buy
Crocus Special Offers
hydrangea
Hydrangea Expression ('Youmesix') hydrangea A longer-blooming, double form NOW £9.99 Buy
New
hydrangea
Hydrangea 'Spike' hydrangea An award-winning newcomer £12.99 Buy
himalayan blue poppy
Meconopsis betonicifolia himalayan blue poppy Bright blue flowers with golden centres in summer £8.99 Buy
poppy field collection
Poppy field collection of annuals poppy field collection Butterflies will fill your garden - Simply... £3.99 Buy
lungwort
Pulmonaria longifolia lungwort Funnel-shaped blue-purple long lasting flowers winter to spring £7.49 Buy
blue cowslip
Pulmonaria angustifolia subsp. 'Azurea' blue cowslip Bright blue flowers £7.49 Buy