Hypericum olympicum 'Grandiflorum'

Mount Olympus St John's wort / 5-10cm

In stock up to and including 22/12/2024

Size: Potmaat leidend

5-10cm

|

Pot 9x9 cm (P9)

|

In stock up to and including 22/12/2024

Number of m2

Nr. of plants

3.00

3.00 per piece

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

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Nr. of plants

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Hypericum olympicum 'Grandiflorum' Can be planted now
Careful and fast delivery throughout the United Kingdom

Benefits according to our specialist

Plantable year-round
Rich flowering
Low maintenance

Plant features
Description
Planting and care
Packaging and shipping

Genus
Hypericum (view all varieties)

Root type
Pot

Pot size
9x9 cm (P9)

Flowering months
June, July, August

Leaf colour
Yellow

Possibilities
Border, Group planting, Edge planting

Soil type
All soil types, well-drained

Positioning
Semi-shade, Sun

Winter hardiness
-9,4°C / -3,9°C, USDA zone 8b/9a

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)
40

Art. no.
1000642

Description

Hypericum olympicum 'Grandiflorum' | Mount Olympus St John's wort

Introducing the delightful Hypericum olympicum 'Grandiflorum', commonly known as the Mount Olympus St John's wort, a plant that brings a splash of bright yellow to any garden setting. This charming species is celebrated for its vibrant blooms that grace the plant throughout the summer months.

Ideal for borders, group plantings, or edging, 'Grandiflorum' lends a touch of wild beauty to your landscape with its bushy spreading growth habit and ability to thrive in a variety of soil conditions.

Key Features

The Hypericum 'Grandiflorum' is known for its bushy and spreading growth habit, reaching an ultimate height of approximately 40 cm.
Its foliage is a striking mix of green, grey, and silver throughout the spring, summer, and autumn seasons.
During the summer, this plant is adorned with large, sunny yellow flowers, which stand out against its silvery foliage.
This species is drought resistant, making it a suitable choice for gardeners with average water resources.
Although deciduous, its robust nature and low maintenance make it a hassle-free addition to any garden.

Tips

Plant your Hypericum olympicum 'Grandiflorum' in a sunny to partially shaded area of your garden to ensure the best display of blooms.
Water the plant regularly, but be mindful not to overwater, as it thrives in well-drained soil.
While 'Grandiflorum' does not typically require extensive pruning, it can be lightly pruned in early to mid-spring to encourage new growth and maintain its shape.
Propagation can be easily achieved through softwood or semi-ripe cuttings in the spring or early summer, offering an excellent way to expand your garden or share with fellow enthusiasts.

Ideal placement of a Hypericum olympicum 'Grandiflorum'

Hypericum olympicum 'Grandiflorum' thrives best in locations with full sun to partial shade. This ensures the plant's bushy and spreading growth habit is well supported, allowing it to reach its full potential of vibrant yellow blossoms throughout the summer months. The species is adaptable to all soil types, provided they are well-drained. Its resilience to drought makes it suitable for a variety of garden settings, particularly in borders, group, or edge plantings, where its silver to grey-green foliage can create a striking contrast. Proper placement ensures this species will flourish with minimal care.

How do I plant a Hypericum olympicum 'Grandiflorum'?

For successful establishment, Hypericum olympicum 'Grandiflorum' should be planted into well-drained soil to accommodate its adaptable nature. This species thrives in both sunny and partially shaded locations. Upon planting, ensure the root ball is level with the soil surface and spaced adequately to allow for its bushy spreading growth habit. Water moderately to settle the soil around the roots and maintain average moisture levels, particularly during dry spells, as the plant is drought-resistant but will benefit from consistent watering while it establishes. Given its moderate growth rate, this plant will reach its mature height of 40 cm, contributing a robust, silvery-green foliage and vibrant yellow blooms to any garden border.

Pruning a Hypericum olympicum 'Grandiflorum'

The minimal pruning requirements of Hypericum olympicum 'Grandiflorum' make it a low-maintenance addition to any garden. To encourage robust growth and maintain its bushy form, it is best to prune in early to mid-spring. This timing allows the plant to recover from any frost damage and capitalize on the burgeoning energy of early season growth. Simply remove any dead or damaged wood and thin out congested areas to allow light and air to reach the center of the plant. This will also help to stimulate the forthcoming blooms.

Watering a Hypericum olympicum 'Grandiflorum'

Hypericum olympicum 'Grandiflorum' has moderate water requirements and is able to withstand periods of dryness due to its drought-resistant nature. However, for optimal growth and bloom, ensure the soil remains moist, particularly during the warm summer months when it is actively flowering. It is important to water deeply and less frequently, rather than light, daily watering to promote a strong, deep root system. In pot culture, be vigilant as the planting medium can dry out faster, requiring more consistent watering to maintain soil moisture.

Fertilising a Hypericum olympicum 'Grandiflorum'

To ensure the robust growth and vibrant yellow blooms of Hypericum olympicum 'Grandiflorum', it is important to provide optimal nourishment through careful fertilization. A balanced, slow-release fertilizer applied once in early spring can support the plant's needs throughout the growing season. The fertilizer should be scattered around the base of the plant, avoiding direct contact with the foliage and stems to prevent any potential damage.

Given its ability to thrive in various soil types, this species does not demand heavy feeding, and over-fertilization should be avoided to maintain its natural growing conditions. An annual application is typically sufficient to sustain its bushy and spreading growth habit, as well as to enhance the silvery aspect of its foliage, which persists from spring through autumn.

The characteristics of a Hypericum olympicum 'Grandiflorum'

Cultivated within the confines of a pot, Hypericum olympicum 'Grandiflorum' offers a compact growth habit, making it an excellent choice for those with limited space. Its vibrant yellow flowers provide a cheerful display throughout the summer months. This variety thrives with minimal care, and its drought-tolerant nature ensures resilience even in less than ideal watering conditions. An often-overlooked benefit is its ability to attract pollinators, adding not only beauty but also ecological value to your garden or patio.

What will be the height of Hypericum olympicum 'Grandiflorum'?

Hypericum olympicum 'Grandiflorum' typically grows to a height ranging from 10 to 50 centimeters when fully matured.

What will be the width of Hypericum olympicum 'Grandiflorum'?

Hypericum olympicum 'Grandiflorum' will reach a maximum width of 10 centimeters to 50 centimeters when fully mature.

Which soil type is most suitable for the Hypericum olympicum 'Grandiflorum'?

Hypericum olympicum 'Grandiflorum' is adaptable to various soil types, but it thrives best in well-drained soil. Ensuring proper drainage allows the plant to establish and flourish in optimal conditions.

What is the ideal positioning for the Hypericum olympicum 'Grandiflorum'?

The optimal location for Hypericum olympicum 'Grandiflorum' would be an area that receives both direct sunlight and partial shade. This plant thrives in conditions where it can experience the benefits of sunlight as well as some protection from the intensity of direct sun rays.

What is the flowering colour of the Hypericum olympicum 'Grandiflorum'?

The blossoms of Hypericum olympicum 'Grandiflorum' exhibit a vibrant yellow hue, adding a delightful touch to the plant's appearance.

Is the Hypericum olympicum 'Grandiflorum' hardy?

Yes, Hypericum olympicum 'Grandiflorum' is considered winter hardy. It can tolerate temperatures ranging from -9.4°C to -3.9°C, placing it within the USDA hardiness zones 8b to 9a. This indicates that Hypericum olympicum 'Grandiflorum' is well-suited to endure the winter conditions of these specific hardiness zones.

Is the Hypericum olympicum 'Grandiflorum' evergreen?

Hypericum olympicum 'Grandiflorum' is not an evergreen plant. It sheds its leaves during the autumn and grows new ones in the spring, following a deciduous pattern.

What is the growth strength of the Hypericum olympicum 'Grandiflorum'?

Hypericum olympicum 'Grandiflorum' achieves its maximum height within a span of 2 to 5 years, denoting a moderate yet steady growth rate.

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