Delphiniums belong to that class of plants called short-lived perennials, which means that although they are winter hardy and might, in a more perfect world ( like the south of England ), go on for years and years, here in the land of hot summer nights ( and winters full of freeze and thaw cycles ) they tend to peter out over time.
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The shrub is short but vigorous, with very few prickles, smooth, mid green leaves, and a height of 60 to 120 cm at an average width of 60 cm .'C�cile Br�nner'tolerates shade and poorer soils, is very disease resistant and winter hardy up to-26 �C ( USDA zone 5b ) .'C�cile Br�nner'can also be grown as a garden plant or in pots and greenhouses and is available in commerce.
