Black Knight Buddleja Flower Seeds for Planting

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$16.99
$16.99
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Black Knight Buddleja is a vigorous ornamental shrub producing long spikes of deep purple flowers above silvery-green foliage. It thrives in fertile, well-drained soil with full sunlight and is ideal for borders, wildlife gardens, hedges, and landscape planting, providing striking seasonal colour and ornamental value.
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Black Knight Buddleja Flower Seeds for Planting

$16.99

Planting Season

Spring

Light Requirement

Full Sun

Plant Height

2–3 m

Indoor/Outdoor

Outdoor
Planting Information
Life Cycle Perennial
Plant Characteristics Deep purple flower spikes with bushy growth
Plant Type Flowering Shrub
Flavour Profile Mild Floral Fragrance
Life Perennial
Germination Time 14–28 Days
Fruit Size Not Applicable
Soil Type Fertile Well-Drained Loamy Soil
Soil pH 6.0–7.5
Spacing Between Plants 1.5–2 m
Watering Needs Moderate
Harvest Time Not Applicable
Bloom Season Summer to Autumn
Seeds per Pack 100
Seed Type Open Pollinated
Yield Potential Develops into a vigorous flowering shrub
GTIN 36002368766380

Sow seeds on moist seed-starting mix and cover very lightly with fine soil. Maintain even moisture until germination. Transplant seedlings after healthy growth develops.

Water regularly during establishment and reduce watering after maturity. Grow in full sunlight. Prune lightly after flowering and apply organic compost annually.

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Frequently Asked Questions

Everything you need to know before you sow.

Can Buddleja ‘Black Knight’ be grown in an outdoor garden?

Yes. Buddleja ‘Black Knight’ can be grown outdoors where suitable light, well-drained soil, moisture, and appropriate temperature conditions are available.

How should Buddleja ‘Black Knight’ be positioned?

Choose a location with suitable light, good drainage, and enough space for the shrub to establish and develop without excessive crowding.

Can Buddleja ‘Black Knight’ be grown with other flowering plants?

Yes. It can be included in a mixed ornamental planting when neighboring plants have compatible light, soil, watering, spacing, and temperature requirements.

What does Buddleja ‘Black Knight’ identify in the product name?
Buddleja identifies the flowering shrub genus, while ‘Black Knight’ identifies the named selection offered in the seed listing.

How should Buddleja ‘Black Knight’ seeds be started?

Sow the seeds in a suitable seed-starting medium and maintain appropriate moisture and temperature conditions during germination. Follow the product-specific growing instructions where provided.

What can affect Buddleja ‘Black Knight’ growth and flowering?

Growth and flowering may vary depending on temperature, sunlight, soil conditions, watering, plant establishment, and the overall growing environment. Plants grown from seed may take time to develop and reach flowering maturity.

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