Red valerian Centranthus ruber 'Albus' 5-10 pot P9

Size: Potmaat leidend

5-10cm

|

Pot 9x9 cm (P9)

|

In stock up to and including 22/12/2024

Number of m2

Nr. of plants

2.90

2.90 per piece

incl. VAT, excl. shipping costs (calculated in shopping cart)

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Centranthus ruber 'Albus' Can be planted now
Careful and fast delivery throughout the United Kingdom

Benefits according to our specialist

Rich flowering
Low maintenance
Easy plant

Plant features
Description
Planting and care
Packaging and shipping

Genus
Centranthus (view all varieties)

Root type
Pot

Pot size
9x9 cm (P9)

Flowering months
June, July, August

Leaf colour
White

Possibilities
Border, Group planting

Soil type
All soil types, well-drained

Positioning
Semi-shade, Sun

Winter hardiness
-15,0°C / -9,4°C, USDA zone 7b/8a

Fruit-bearing plants
No

Water needs
Average water

Number of plants per m²
9

Evergreen plants
No

Leaf colour
Green

Fragrant plants
No

Growth habit
Upright growth habit

Height at time of delivery excluding pot/clod
5-10

Mature height (cm)
70

Art. no.
1000233

Description

Centranthus ruber 'Albus' | Red valerian

Centranthus ruber 'Albus', commonly known as red valerian despite its delightful white blooms, is a perennial favorite for gardeners seeking a touch of elegance and simplicity. This charming variety captivates with clusters of snow-white flowers that rise above its silver-green foliage. A mainstay of traditional and cottage gardens, it thrives in a range of locations, from sunny spots to areas with partial shade, inviting a sense of tranquility and purity to the landscape.

Key Features

Centranthus ruber 'Albus' is a versatile plant that can adapt to all well-drained soil types, making it an excellent choice for borders and group plantings.
This plant's white flowers provide a beautiful contrast against its green, grey, and silver foliage, which maintains its attractiveness throughout the seasons.
With an upright growth habit, it reaches a mature height of 70 cm, ideal for adding structure to your garden without overpowering other species.
The semi-evergreen nature of its foliage ensures year-round interest, even in regions that experience milder winters.

Tips

To ensure the best growth and flowering of Centranthus ruber 'Albus', plant it in a location that receives full sun to partial shade.
While it is drought-resistant, providing average water will maintain its vigor, especially during prolonged dry spells.
Consider using this plant for bordering garden paths or as part of a larger group planting for a visually compelling display.
Propagation of this species is straightforward: sowing seeds will allow you to cultivate new plants and expand your garden's white valerian population.
While it is generally low-maintenance, do remember to deadhead spent flowers to encourage additional blooming and prevent self-seeding if not desired.

Ideal placement of a Centranthus ruber 'Albus'

For optimal growth, Centranthus ruber 'Albus' should be positioned where it will receive full sun or partial shade, as these conditions will encourage the most prolific flowering. This species is quite adaptable to a variety of soil types, provided the soil is well-drained. The plant's drought resistance makes it an excellent choice for gardeners seeking a low-maintenance addition to borders or group plantings. Its ability to flourish in less fertile soils also makes it a versatile candidate for various garden settings. The semi-evergreen foliage retains its green, grey, and silver hues throughout the seasons, adding a persistent splash of color to the landscape.

How do I plant a Centranthus ruber 'Albus'?

For optimal establishment, Centranthus ruber 'Albus' should be planted in a well-drained soil, which can be of any type, enhancing its adaptability to various garden conditions. Select a location that receives full sun to partial shade to encourage vigorous growth and abundant flowering. When planting, ensure there is enough space for the plant to reach its mature height of up to 70 centimeters with its characteristic upright growth habit. Water the plant regularly to maintain average soil moisture, particularly during dry periods, as this species exhibits some drought resistance. For propagation, seeds can be sown to expand or refresh your garden display.

Pruning a Centranthus ruber 'Albus'

To maintain the vigor and appearance of Centranthus ruber 'Albus', it is recommended to prune back the spent flower stems after the initial bloom period in late summer. This can encourage a second flush of flowers and prevent the plant from self-seeding excessively if that is not desired. Pruning should be done with care, cutting back to the base of the spent flower stem, being careful not to damage the semi-evergreen foliage which adds to the plant's charm throughout the year.

Watering a Centranthus ruber 'Albus'

The Centranthus ruber 'Albus' has moderate water requirements and thrives in well-drained soil. While establishing its roots, ensure the soil remains consistently moist but not waterlogged. After rooting firmly, this species exhibits a commendable degree of drought resistance. Regular watering should be reduced, promoting resilience and a robust root system. During prolonged dry spells, supplemental watering will sustain the plant's health without the need for excessive hydration. It's important to allow the soil to dry out slightly between watering sessions to avoid potential issues with overwatering.

Fertilising a Centranthus ruber 'Albus'

To support the robust growth and prolific flowering of Centranthus ruber 'Albus', it is essential to fertilize correctly. Ideally, fertilization should occur in the early spring as new growth emerges and again midway through the blooming season to replenish nutrients. A balanced, slow-release fertilizer is recommended, which will provide a steady supply of essential nutrients over several months. Care should be taken to apply the fertilizer according to the manufacturer's instructions, gently working it into the soil around the base of the plant while avoiding direct contact with the foliage.

Given its ability to thrive in a variety of soil types, this species does not require heavy feeding. Moderate fertilization will suffice to ensure that the plant remains vigorous and continues to produce its characteristic white blooms throughout the flowering months.

The characteristics of a Centranthus ruber 'Albus'

Centranthus ruber 'Albus' is an asset to any garden with its clusters of pristine white flowers. This variety, while often overlooked, is a magnet for beneficial pollinators such as bees and butterflies, enhancing the ecological balance of your outdoor space. It thrives in a variety of soil types, provided they are well-drained, making it a versatile addition to borders, rockeries, or even urban gardens. Delight in its low-maintenance nature and the subtle charm it adds throughout the blooming period.

Separating/dividing a Centranthus ruber 'Albus'

To maintain the robustness and encourage rejuvenation of Centranthus ruber 'Albus', division is recommended every few years. The task involves gently lifting the plant from its location and separating the root clumps into smaller sections. Each section should have a good amount of roots and shoots to ensure successful re-establishment when replanted. The best time to divide these plants is either in the early spring before new growth starts or in the late autumn as the plant goes dormant. This ensures the white-flowered red valerian has time to establish itself in its new position before the onset of extreme weather.

What will be the height of Centranthus ruber 'Albus'?

Centranthus ruber 'Albus' typically grows to a height ranging between 50 centimeters and 1 meter.

What will be the width of Centranthus ruber 'Albus'?

Centranthus ruber 'Albus' will achieve a final spread ranging from 10 centimeters to 50 centimeters.

Which soil type is most suitable for the Centranthus ruber 'Albus'?

Centranthus ruber 'Albus' is adaptable to various soil types, but it thrives best in well-drained soil. Ensuring proper drainage allows for optimal growing conditions and supports the plant's overall health and vigor.

What is the ideal positioning for the Centranthus ruber 'Albus'?

The most suitable location for Centranthus ruber 'Albus' is an area where it can receive ample sunlight, but it can also thrive in a spot with partial shade. This plant is versatile and can adapt to different light conditions, ensuring it can flourish in various garden settings.

What is the flowering colour of the Centranthus ruber 'Albus'?

The blooms of Centranthus ruber 'Albus' display a pure white color, contributing to the plant's elegant and pristine appearance.

Is the Centranthus ruber 'Albus' hardy?

Centranthus ruber 'Albus' is indeed winter hardy. It can endure temperatures ranging from -15.0°C to -9.4°C, falling within the USDA hardiness zones 7b to 8a. These characteristics make Centranthus ruber 'Albus' well-suited for withstanding winter conditions in regions within these hardiness zones.

Is the Centranthus ruber 'Albus' evergreen?

Centranthus ruber 'Albus' is not an evergreen plant. It sheds its leaves during the autumn season and regrows them in the spring, following a deciduous pattern.

What is the growth strength of the Centranthus ruber 'Albus'?

Centranthus ruber 'Albus' is known for its relatively rapid growth, reaching its ultimate height within a period of two to five years. This indicates that it is a species that shows steady and consistent progress in its development over a moderate timeframe.

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