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Some Buddleja cultivars are either sterile or produce less than 2% viable seed (see "Non-invasive" Buddleja cultivars). [ 29 ] [ 30 ] [ 33 ] [ 34 ] The state of Oregon , which designates B. davidii as a " noxious weed " and initially prohibited entry, transport, purchase, sale or propagation of all of its varieties, amended its quarantine in ...
Deadheading annuals in most cases will lead to longer bloom time and encourage growth of the plant. Annuals such as cosmos, petunias, geraniums, marigolds, zinnias, and others benefit greatly from ...
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Buddleja nivea reaches 1–3 m high, and is chiefly distinguished by the dense white indumentum covering the branchlets, calyxes, and undersides of the leaves. The lanceolate leaves are of variable size, 6–22 cm long by 1.5–11 cm wide; they are acute or acuminate at the apex, rounded at the base, and very coarsely toothed except at the apex.
Buddleja alternifolia, known as alternate-leaved butterfly-bush, [1] is a species of flowering plant in the figwort family, which is endemic to Gansu, China.A substantial deciduous shrub growing to 4 metres (13 ft) tall and wide, it bears grey-green leaves and graceful pendent racemes of scented lilac flowers in summer.
Buddleja lindleyana grows to < 3 m in height in the wild, its slender branches tetragonous in section, and slightly winged. The dark green leaves are opposite, ovate , 4 – 20 cm in length. The individual purple flowers are arguably among the most attractive of the genus , but occur in such small numbers intermittently along slender, terminal ...
Buddleja marrubiifolia is a dioecious multi-branched shrub that is 0.5 to 2 m (1.6 to 6.6 ft) high with greyish to blackish rimose bark. The young branches are terete and tomentose, bearing ovate to rhomboid leaves that are 1 to 3 cm (0.39 to 1.18 in) long by 0.6 to 1.5 cm (0.24 to 0.59 in) wide, membranaceous to subcoriaceous, and densely tomentose on both surfaces.
Buddleja tubiflora grows to < 2 m in height, with the typically lax habit creating a spread of < 3 m. The shrub is chiefly distinguished by its striking orange flowers, the corollas 25 mm long by 6 mm wide at the throat, borne in axillary clusters towards the ends of the branches.