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Products > Caryopteris x clandonensis 'Longwood Blue'
 
Caryopteris x clandonensis 'Longwood Blue' - Bluebeard

Note: This plant is no longer in stock. This is an archive page preserved for informational use.  
Image of Caryopteris x clandonensis 'Longwood Blue'
[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 in well-drained soil 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. A nice showy dry growing plant that is attractive to bees, butterflies and other pollinating insects. This plant is the result of a cross between 2 species, Caryopteris incana and C. mongholica, both species native to Asia (Mongolia, China, Korea, and Japan). 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. Other common names for this plant are Blue Spirea, Blue Mist Shrub and Blue Mist Spirea. We grew this plant from 1994 until 2015. 

Information displayed on this page about Caryopteris x clandonensis 'Longwood Blue' is based on our research conducted about this plant in our nursery library as well as from information provided by reliable online resources. We also include our own observations made about it as it has grown in the nursery gardens and other gardens visited, as well how the crops of this plant performed in the containers in our nursery field. We will also include comments received from others and welcome hearing from anyone who has information about this plant, particularly if it includes cultural information aiding others to better grow it.

 
San Marcos Growers closed for regular business at the end of 2025 as the property is being developed for affordable housing.
While our gates remain closed, we will open them by appointment so we can liquidate remaining plants, supplies and equipment. The plants remaining in the field are listed on our Live Inventory Page.