Black Knight Butterfly Bush (Buddleja davidii 'Black Knight') | Dark Purple Flowering Shrub

Black Knight Butterfly Bush

Buddleja Lo & Behold 'Blue Chip'

A fast-growing, hardy shrub with spectacular, fragrant, near-black flower spikes that are a magnet for butterflies and other pollinators.

$18.90

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旧金山湾区本地苗圃

胜利苗圃专注于交付原盆原土植物，苗木体积和重量较大。为确保植物健康与品质，目前仅提供旧金山湾区本地派送服务。

如您不在派送范围内，我们仍可提供花园设计服务。

欢迎苗木行业从业者交流合作。

Buddleja davidii 'Black Knight' is a classic and dramatic deciduous shrub, prized for its exceptionally long, fragrant panicles of very dark purple flowers that appear to be almost black . This vigorous, fast-growing plant is a cornerstone of the pollinator garden, as its nectar-rich blooms are a powerful magnet for butterflies, bees, and hummingbirds from midsummer through fall . With its arching, vase-shaped habit and silvery-green foliage, it provides a bold, colorful accent and a reliable late-season source of color when many other shrubs have finished blooming .

盆号尺寸示意

常见苗圃规格

1加仑

小苗起步
适合大面积种植或预算有限的情况
扎根快，但前期浇水要勤

5加仑

小灌木、中等大小的多年生植物、小树苗
价格和大小比较均衡
适合新花园，愿意等植物慢慢长大

15加仑

湾区景观绿化最常用的规格
种下去就有明显效果
高度一般在14-7英尺左右，看品种

24寸方盆

树更成熟，骨架更好
通常高6-10英尺
种下去马上就有树荫或隐私遮挡效果

36寸方盆及更大

精品大树的规格
用于高端住宅或商业景观
配送和种植需要动用机械

该怎么选

想要树篱（隐私遮挡）：想马上见效选15加仑或24寸方盆
种果树：5、7、15加仑都能选，看预算和耐心
种观赏植物：5加仑慢慢养大，15加仑一步到位

快速对照

5加仑：拎得动，阳台友好
15加仑：树形饱满，果子更快吃上
24寸方盆：种下去就是成品效果

（*不包含植物高度）

（*每种树高度和状态都不同，根据实际品种照片为主）

Features:Foliage: Narrow, lance-shaped leaves with velvety gray-green texture,Flowers: Dense conical panicles of magenta-violet blooms with golden-orange centers,Habit: Compact, mounding semi-evergreen shrub
Mature Height: 2-3 ft
Mature Width: 2-3 ft
Growth Rate: Fast
Light Needs: Full sun (6+ hours daily)
Key Advantages:Non-invasive sterile variety,Continuous summer-to-frost blooming,Highly attractive to butterflies/hummingbirds,Superior cold hardiness,Drought tolerant once established
Landscape Uses:Pollinator gardens,Container plantings,Low borders,Rock gardens,Mass plantings
Special Care:Pruning: Cut back to 6-12" in early spring,Soil: Well-drained; adaptable to pH 5.0-8.5,Water: Weekly until established, then drought tolerant,Fertilizer: Balanced slow-release in spring
Seasonal Interest:Flowers: June through September,Foliage: Semi-evergreen in zones 7-9

Q: How should I prune my Black Knight Butterfly Bush?
A: It blooms on new wood . Prune hard in late winter or early spring (March), cutting the previous year's growth back to within a few buds of the base. This encourages strong, vigorous new shoots and the most abundant flowering. In cold climates, it may die back to the ground but will regrow from the roots .

Q: Is Black Knight Butterfly Bush invasive?
A: Yes, it can be invasive. It self-seeds readily, and Buddleja davidii is classified as invasive in several US states (including parts of the East, Oregon, Washington, and California) . To prevent unwanted spread, remove spent flower spikes before they set seed.

Q: How much sun and water does it need?
A: It thrives in full sun (at least 6 hours per day). It is very adaptable to soil types but prefers a moist, well-drained location. Water regularly during the first growing season; once established, it is drought-tolerant .

Q: Does it really attract butterflies?
A: Absolutely. It is one of the most renowned butterfly and pollinator plants . Its fragrant, nectar-rich flowers also attract hummingbirds and bees throughout its long bloom season .