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Hyacinthus City of Haarlem - Garden Hyacinth

Hyacinthus x orientalis City of Haarlem
Common Hyacinth, Garden Hyacinth

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This hyacinth produces large clusters of highly fragrant flowers. The inflorescences are made up of several dozen small flowers of a bright yellow. A beautiful variety that blooms in March-April when planted outdoors. Indoors, this prepared bulbous plant will bloom in the heart of winter, in a cool and bright room.
Flower size
20 cm
Height at maturity
25 cm
Spread at maturity
10 cm
Exposure
Sun, Partial shade
Hardiness
Hardy down to -15°C
Soil moisture
Dry soil, Moist soil
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Best planting time September to October
Recommended planting time October to November
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Flowering time March to April
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Description

Hyacinthus orientalis 'City of Haarlem' is a garden Hyacinth that is grown outdoors, and here it is prepared to bloom early indoors in order to advance its flowering in the heart of winter. What a pleasure it is to enjoy this visual and olfactory spectacle! The large inflorescences of a bright yellow are particularly decorative and emit a delightful fragrance in the house. It will be perfectly at home in a bright and cool room, where it will enhance the atmosphere for several weeks.

Although the Oriental Hyacinth is no longer widely cultivated, this species, native to the Middle East and Mediterranean regions, has given rise to countless cultivars, highly appreciated in gardens for their delightful spring flowering or in floristry for their forcing ability. 


Formerly classified among the Liliaceae family, the genus Hyacinthus is now classified in the Asparagaceae family, like asparagus, as well as Agave and Yucca. This plant has a large oval bulb and forms a clump of bright green ribbon-like leaves, from which a robust floral stem emerges indoors as early as January, reaching a length of 20cm (8in). It is covered with a multitude of small star-shaped flowers, carried on short peduncles, forming a dense cluster measuring up to 8 or 9cm (3 or 4in) in diameter. Each flower consists of a tube at the base, which opens at the other end into a star-shaped corolla with six elongated, pointed petals. The inflorescence takes on a light to more intense yellow colour, truly brightening up the dark winter days. In addition, it has a fairly intense fragrance that adds to the appeal of this bulbous plant. The foliage is deciduous after flowering, and it is at this time that the bulb, whose reserves are depleted, enters dormancy. The forcing technique involves exposing the bulbs to cold temperatures for several weeks, starting from the end of summer, in order to break their dormancy and induce the flowering process earlier than usual.

Among early bloomers, the hyacinth is one of the most attractive, both for its highly graphic and large inflorescence, and for the sweet fragrance it spreads around. Moreover, it is very easy to force and therefore deserves a prominent place in a very bright room, away from any source of heat.
To create original winter scenes, you can combine 'City of Haarlem' with other bulbous plants suitable for forcing, such as
Crocus, the charming Snowdrop (Galanthus nivalis) with its trailing white bell-shaped flowers, or Muscari aucheri 'Early Magic', with its long, almost unreal blue inflorescences. However, don't limit yourself to flowers alone, and also focus on decorative barks, such as that of Cornus alba 'Baton Rouge', a Dogwood with superb coral red branches, as well as the twisted shoots of the Corylus avellana 'Contorta'. These woody plants will allow you to create compositions worthy of the best florists in your haven.
Hyacinth flowers are edible, raw or cooked, and have a slightly mucilaginous texture. Depending on your preferences, you can crystallize them with sugar or add them to fruit salads. In the past, they were considered a delicacy and could be found under the name "candied hyacinths of Constantinople".

Hyacinthus City of Haarlem - Garden Hyacinth in pictures

Hyacinthus City of Haarlem - Garden Hyacinth (Flowering) Flowering
Hyacinthus City of Haarlem - Garden Hyacinth (Plant habit) Plant habit

Plant habit

Height at maturity 25 cm
Spread at maturity 10 cm
Growth rate fast

Flowering

Flower colour yellow
Flowering time March to April
Inflorescence Cluster
Flower size 20 cm
Fragrance Very fragrant, Floral, fresh
Bee-friendly Attracts pollinators
Good for cut flowers Cut flower blooms

Foliage

Foliage persistence Deciduous
Foliage colour medium green

Botanical data

Genus

Hyacinthus

Species

x orientalis

Cultivar

City of Haarlem

Family

Asparagaceae

Other common names

Common Hyacinth, Garden Hyacinth

Origin

Cultivar or hybrid

Planting and care

For forcing hyacinth bulbs, it is highly recommended to obtain new bulbs cultivated specifically for this purpose every year.

Indeed, the bulbs are exhausted by forcing, and even a period of rest after the foliage has dried out will not allow them to replenish their reserves.
However, they can still be stored, once the foliage has turned yellow, in a cool place until autumn, when they can be replanted in the garden. The bulbs that are replanted will ideally flower after two years, as a season of growth in the ground without flowering will allow them to replenish their reserves.


First method: pot culture:
Upon receiving your bulbs, choose an attractive container with a drainage hole (terrine, planter...), the height of which should be at least twice the height of the bulbs. Place a layer of gravel at the bottom, followed by a mixture of soil or horticultural compost mixed with sand or a ready-to-use mixture. The substrate should be light and porous, a mixture of 2/3 garden soil and 1/3 sand works well.

The bulbs should be planted close together but should not touch each other, and the soil should cover them by 10cm (4in).

Place the pots outside in the garden or on a balcony.

When the bulb starts to sprout, bring the pot indoors and place it in a dark and cool location for a period ranging from four days to one week. Once the sprout reaches a height of eight to ten centimeters, move the pot inside the house. It is preferable to allow for an adjustment period by placing it first in a slightly cool and bright room before moving it to a heated room, near a window in the living room, for example, while regularly rotating the pot to prevent the twisting of the flower spike.


Second method: carafe culture:

In stores, you can find forcing carafes or hyacinth carafes, but it is also possible to use a small vase, a jar, or any other transparent glass container with a diameter that matches the diameter of the bulb. In this case, the growing medium is water.

Place a piece of charcoal at the bottom of the carafe to prevent rotting and putrefaction of the water.

Place the bulb in the carafe with the tip facing upwards.

Pour water into the carafe so that it reaches the base of the bulb without actually touching it, leaving about 1 or 2 millimetres between the water surface and the base of the bulb.

Place everything outside or in a cool, frost-free location.

Maintain the water level just touching the base of the bulb diligently. The roots will develop at the base, as well as small shoots at the top of the bulb.

When the shoot measures approximately 8 centimetres (3 inches), the carafe can be brought inside the house, even in a slightly heated and well-lit room.


Planting period

Best planting time September to October
Recommended planting time October to November
Planting depth 10 cm

Intended location

Type of use Greenhouse, Conservatory
Hardiness Hardy down to -15°C (USDA zone 7b) Show map
Ease of cultivation Beginner
Planting density 20 per m2
Exposure Sun, Partial shade
Soil pH Any
Soil moisture Dry soil, Moist soil, Well-drained soil, deep.

Care

Pruning instructions Remove the faded flowers so that the plant does not exhaust itself by producing seeds.
Pruning Pruning recommended once a year
Pruning time March to April
Soil moisture Dry soil, Moist soil
Disease resistance Very good
Overwinter Needs to be stored

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