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All ratings refer to the UK growing conditions unless otherwise stated. Minimum
temperature ranges (in degrees C) are shown in brackets
AGM plants have been through a rigorous trial and assessment programme. They are:
This plant will provide nectar and pollen for bees and the many other types of pollinating insects.
It is included in an evolving list of plants carefully researched and chosen by RHS experts. Divided into 3 groups these lists, linked below, are maintained by a team of RHS staff and are reviewed annually.
'Bluesylva' is a low, spreading biennial with grey-green foliage. The flowers are bright blue with a yellow eye that fades to white
M. arvensis is an annual to short-lived perennial that can form an over-wintering rosette of greyish-green, hairy leaves. Reaching a height of around 40cm, it flowers mainly in spring, but may carry on until autumn. The curved flowering stalk unfurls with a succession of blue, occasionally pink, 5-lobed flowers
M. scorpioides is a erect rhizomatous perennial to 30cm, with oblong leaves and bright blue, white or yellow-eyed flowers 8mm across, in cymes in early summer
'Blue Ball' is a compact rounded annual or biennial to 15cm, with dense cymes of bright bue flowers in spring and early summer
M. hortensia is a perennial with large, somewhat fleshy, glossy emerald green leaves, to 30cm long, and terminal flowerheads of forget-me-not blue flowers, each 1.25cm across, pale round the edges with darker centres, held on stout stems, above or amongst the leaves in early summer, reaching 45cm in height
M. sylvatica is a hairy perennial. It flowers between mid-spring and mid-summer, bearing small, bright blue, 5-lobed flowers with white or yellow centres. Nectar and pollen is enjoyed by bumble bees and butterflies
B. macrophylla is an herbaceous perennial forming a clump to 45cm, with broad sprays of small, clear blue flowers, followed by large heart-shaped, long stalked leaves
Listed in the RHS Plant Finder
This plant is listed in the RHS Plant Finder book. At present our information about this plant is limited to a list of the nurseries that supply it. In time we will be adding more details including a description, growing information, advice and photographs.
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