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Products > Caryopteris x clandonensis 'Longwood Blue'   Caryopteris x clandonensis 'Longwood Blue' - Bluebeard    [2nd Image] Habit and Cultural Information Category: Perennial Family: Verbenaceae (Vervains) Origin: Garden Origin Flower Color: Blue Bloomtime: Summer Parentage: (C. incana x C. mongholica) Height: 2-3 feet Width: 2-3 feet Exposure: Sun or Shade Deer Tolerant: Yes Irrigation (H2O Info): Medium Water Needs Winter Hardiness: < 0 °F Caryopteris x clandonensis 'Longwood Blue' (Bluebeard) - A soft-wooded deciduous shrub that typically grows to 2-3 feet tall and slightly wider but can reach up to 4 feet tall in optimum conditions. Amongst the narrow silvery-gray leaves are produced violet-blue flowers in terminal and axillary clusters from mid to late summer. The foliage is lightly aromatic and the flowers are attractive to bees and butterflies. Plant in full sun to part shade with moderate to occasional irrigation. It is hardy to around -15°F and will freeze back to the ground and then rejuvenate in the warmer months in colder climates. Since flowers form on new wood, cutting it back to within 4 to 6 inches of the ground after the danger of last frost is recommended to keep the plant tidy. Other common name for this plant are Blue Spirea, Blue Mist Shrub and Blue Mist Spirea. This plant is the result of a cross between 2 species, Caryopteris incana and C. mongholica. The first cross between these species was a chance garden hybrid that occurred in England in the 1930's but this selection, made for its large upright growth, prolific sky blue flowers and silvery-gray foliage, originated at Longwood Gardens in Kennett Square, Pennsylvania. It received the Missouri Botanical Garden 1999 Plant of Merit designation.  This description of this plant is based on our research and our observations of it growing at the nursery, in our own garden and in other gardens. We always appreciate receiving feedback of any kind from those who have any additional information about this plant, particularly if they disagree with what we have written or have additional cultural tips that would aid others growing Caryopteris 'Longwood Blue' .