| 词条 | Buddleja davidii 'Blue Horizon' |
| 释义 |
| name = Buddleja davidii 'Blue Horizon' | species = Buddleja davidii | cultivar = 'Blue Horizon' | origin = | image = Buddleja davidii 'Blue Horizon'.jpg | image_caption = 'Blue Horizon', Longstock Park, UK }}Buddleja davidii 'Blue Horizon' is a cultivar introduced to commerce in the UK by Bob Brown, Cotswold Garden Flowers, in the early 20th century. It was accorded the RHS Award of Garden Merit (record 677) in 2010,[1] by virtue of its superior sapphire-blue hue, relegating 'Empire Blue' to the Sunset List for rescission of its AGM. [2] [3] Description'Blue Horizon' has a compact habit, growing to a height 2.7 m, with a spread of 2.6 m. The arching branches bear greyish-silver foliage complementing the clear blue terminal panicles which average 44 cm in length. [4] Cultivation'Blue Horizon' remains uncommon in cultivation, and is not known (2012) to have been introduced to North America. In the UK, it is included in the NCCPG National Collection held by Longstock Park Nursery near Stockbridge in Hampshire. Hardiness: RHS H5, USDA zones 5–9.[3] References1. ^{{cite web | url= https://www.rhs.org.uk/Plants/52474/i-Buddleja-davidii-i-Blue-Horizon/Details|title = RHS Plantfinder - Buddleja davidii ‘Blue Horizon’| publisher = Royal Horticultural Society | accessdate=21 January 2018}} {{Scrophulariaceae-stub}}2. ^Royal Horticultural Society. (2010). Trials Report 2008-2010 Buddleja davidii and its close hybrids Trials Office, Royal Horticultural Society, Wisley, UK. 3. ^1 Stuart, D. D. (2006). Buddlejas. RHS Plant Collector Guide. Timber Press, Oregon. {{ISBN|978-0-88192-688-0}} 4. ^Moore, P. (2011). List of Buddleja davidii cultivars held at Longstock Park Nursery, 2011. Longstock Park, UK. 1 : Buddleja hybrids and cultivars |
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