Perennial cornflower Centaurea montana 'Coerulea' 5-10 pot P9

Size: Potmaat leidend

5-10cm

|

Pot 9x9 cm (P9)

|

Available from: 03/02/2025

Number of m2

Nr. of plants

3.00

3.00 per piece

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

Added to shopping cart

Number of m2

Nr. of plants

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Bulk discount!

Pcs Save Price/pc

2+ £3.35

6+ -3.0% £3.25

12+ -6.0% £3.15

24+ -7.5% £3.10

96+ -10.4% £3.00

Benefits according to our specialist

Plantable year-round
Low maintenance
Easy plant

Plant features
Description
Planting and care
Packaging and shipping

Genus
Centaurea (view all varieties)

Root type
Pot

Pot size
9x9 cm (P9)

Flowering months
May, June, July

Leaf colour
Blue

Possibilities
Border, Group planting

Soil type
All soil types, well-drained

Positioning
Sun

Winter hardiness
-23,3°C / -20,6°C, USDA zone 6a

Fruit-bearing plants
No

Water needs
Average water

Number of plants per m²
9

Evergreen plants
No

Leaf colour
Grey, Green

Fragrant plants
No

Growth habit
Bushy spreading growth habit

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

Mature height (cm)
50

Art. no.
1000232

Description

Centaurea montana 'Coerulea' | Perennial cornflower

The Centaurea montana 'Coerulea', more commonly known as the perennial cornflower, is a cherished addition to any garden with its vibrant blue flowers and bushy spreading growth habit. It is a low-maintenance plant that adds a splash of color to borders and group plantings with its distinctive blue blooms that appear from late spring to mid-summer.

Key Features

The Centaurea is a hardy plant that thrives in a sunny location and accommodates a variety of well-drained soils.
Its unique blue flowers make the perennial cornflower a standout in any floral arrangement or garden setting.
With an average water need, this plant is both beautiful and relatively easy to care for, requiring no special attention once established.
The foliage presents an attractive mix of green and grey, adding to the plant's visual appeal even when it's not in bloom.

Tips

To ensure your Centaurea montana 'Coerulea' thrives, consider the following tips:

Plant it in a sunny spot to promote the best flowering potential, as this species revels in the full light of the sun.
Ensure the soil is well-drained to prevent waterlogging, which could harm the plant's roots.
Water it regularly but be careful not to overwater; the perennial cornflower prefers the soil to be moist but not soaked.
Deadhead spent flowers to encourage additional blooming and maintain the plant's bushy, vibrant appearance.
While it is not evergreen, the plant's foliage and structure will still provide interest throughout the growing season, reaching an ultimate height of about 50 cm.

Ideal placement of a Centaurea montana 'Coerulea'

For optimal growth and flowering, Centaurea montana 'Coerulea' should be situated in a location that receives full sun. This sun-loving species thrives best when bathed in natural light, which encourages a profusion of its striking blue blossoms. While adaptable to various soil conditions, it is crucial that the soil is well-drained to prevent any potential waterlogging, which this plant does not tolerate well. With its bushy spreading growth habit, it makes an excellent choice for borders and group plantings, where its vibrant color can truly stand out.

How do I plant a Centaurea montana 'Coerulea'?

For optimal establishment, Centaurea montana 'Coerulea' should be planted in a location that provides full sun exposure, which is vital for its development and the vibrancy of its blue blooms. The soil should be well-drained, but this species is adaptable to various soil types. When preparing the planting site, ensure the ground is loose and aerated. Space the plants adequately to accommodate their bushy, spreading growth habit, allowing them to reach their full potential with a height of up to 50 cm. After planting, maintain consistent moisture levels in the soil, but be careful not to overwater.

Pruning a Centaurea montana 'Coerulea'

Pruning for Centaurea montana 'Coerulea' should be done post-flowering to maintain a tidy appearance and encourage a second bloom. After the first flush of flowers fades in early summer, cut back the spent flower heads to just above a set of leaves. This will often stimulate a secondary flowering period. Additionally, at the end of the growing season or in early spring, trim back the entire plant to ground level to remove old foliage and support vigorous new growth for the coming season.

Watering a Centaurea montana 'Coerulea'

Centaurea montana 'Coerulea' thrives with average watering, ensuring the soil remains moist but not waterlogged. During the active growth and flowering season from May through July, consistent moisture is key to support its bushy spreading growth habit and vibrant blue blooms. It is advisable to check the soil's moisture level before watering, allowing the top inch to dry out between waterings. Over-watering can be just as detrimental as under-watering, so it's crucial to achieve the right balance. This species is quite adaptable but will benefit from a regular watering schedule, particularly in well-drained soils under full sun exposure.

Fertilising a Centaurea montana 'Coerulea'

To support the lush, bushy growth and striking blue blossoms of Centaurea montana 'Coerulea', fertilization is a key aspect of care. Begin by enriching the soil with a balanced, slow-release fertilizer as new growth appears in early spring. This initial feeding will bolster the plant's energy reserves for the upcoming blooming season. A second application should follow in midsummer to sustain the flourishing display and encourage continued vigor of the foliage. It's essential to ensure that the fertilizer is well-integrated into the soil around the plant's base without making direct contact with the stems or leaves to prevent any potential damage. Regular watering after fertilizing will aid in the dissolution and absorption of nutrients, promoting optimal health and growth of this species.

The characteristics of a Centaurea montana 'Coerulea'

Centaurea montana 'Coerulea' thrives when given ample space to spread its roots, making a pot with generous dimensions ideal. This species, recognized for its resilience, can adapt to various soil types, though it prefers well-draining conditions. Its silvery foliage and striking blue blooms provide an extended display of color from late spring into summer. Deadheading spent flowers will encourage this plant to produce additional waves of blooms, offering a prolonged period of visual interest in any garden setting.

What will be the height of Centaurea montana 'Coerulea'?

Centaurea montana 'Coerulea' typically reaches a height of 50 centimeters when fully mature.

Which soil type is most suitable for the Centaurea montana 'Coerulea'?

For the optimal growth of Centaurea montana 'Coerulea', it is best suited to all soil types as long as the soil is well-drained. This ensures that the plant's roots have access to sufficient oxygen while avoiding waterlogging, contributing to its overall health and vigor.

What is the ideal positioning for the Centaurea montana 'Coerulea'?

Centaurea montana 'Coerulea' thrives best in a sunny location. It is ideal to plant it in an area where it can receive abundant sunlight for optimal growth and blooming.

What is the flowering colour of the Centaurea montana 'Coerulea'?

The blossoms of Centaurea montana 'Coerulea' display a charming blue hue, adding a delightful touch of color to this particular plant variety.

Is the Centaurea montana 'Coerulea' evergreen?

Centaurea montana 'Coerulea' is not an evergreen plant. It sheds its leaves during the autumn and regrows them in the spring, following a deciduous pattern.

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