We have found 17 plants that meet your criteria.

Crocus ‘Crocus chrysanthus Blue Pearl’ Silvery mauve goblets in late winter £3.00 Buy
Fringed Tulip ‘Tulipa Blue Heron’ Long-lasting fringed flowers £4.00 Buy
Hibiscus (syn. Hibiscus syriacus Blue... ‘Hibiscus syriacus Oiseau Bleu’ Late flowering shrub with... £9.99 Buy
Lacecap Hydrangea (syn. Blue Wave)... ‘Hydrangea macrophylla Mariesii Perfecta’ Pink or pale blue lacecap flowers £6.99 Buy
Rosemary ‘Rosmarinus officinalis Miss Jessopp's Upright’ Lavender-blue flowers £5.99 Buy
Wood Anemone ‘Anemone blanda blue-flowered’ A carpet of bright blue daisy-like flowers £4.00 Buy
Iris ‘Iris histrioides Katherine Hodgkin’ Distinctive pale blue and green flowers £7.00 Buy
New
Grape Hyacith ‘Muscari armeniacum Valerie Finnis’ A smaller, paler variety of muscari £4.00 Buy
New
Grape Hyacith ‘Muscari latifolium’ An unusual two-tone effect flower £3.00 Buy
Grape Hyacith ‘Muscari Mount Hood’ Unusual white tipped flowerspikes £4.00 Buy
Scilla ‘Scilla Siberica’ Piercing blue for a woodland garden £4.50 Buy
Parrot Tulip ‘Tulipa Blue Parrot’ Luscious lavender-mauve petals £5.00 Buy
Wood Anemone ‘Anemone blanda’ Bright little jewels in spring £2.99 coming soon
10 Old Fashioned Sweet Pea... ‘Old Fashioned, Highly Fragrant Sweet Pea Collection’ Rare and highly fragrant... £9.99 coming soon
50 plus 20 FREE Spring... ‘Lobelia Trail Away’ Favourite for tubs and hanging baskets £9.99 coming soon
50 plus 20 FREE Spring... ‘Petunia Montage’ Flowers all summer long £9.99 coming soon
50 plus 20 FREE Spring... ‘Salvia Seascape’ £9.99 coming soon