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Collector's item

Garrya x thuretii - Hybrid Garrya

Garrya x thuretii
Hybrid Garrya

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A fast-growing bush, with elegant evergreen foliage, dark green on top. Less decorative than its parent Garrya elliptica, it still offers an unusual winter flowering in the form of grey-yellow aments hanging from the branches. Hardy down to about -10 °C, tolerating sea spray well, this Thuret's garrya is a good hedge plant in mild climates and coastal gardens.
Flower size
20 cm
Height at maturity
4 m
Spread at maturity
4.50 m
Exposure
Sun, Partial shade
Hardiness
Hardy down to -9°C
Soil moisture
Dry soil, Moist soil
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Best planting time March to April
Recommended planting time March to June
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Flowering time January to February
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Description

The Garrya (x) thuretii is a vigorous evergreen bush that allows for expanding the range of hedge plants in coastal gardens or in our mild regions, because its cold resistance is limited. Less spectacular than those of its parent, the Garrya elliptica, its winter flowering in slender pendulous yellowish-gray aments brings a little life to the garden, while its evergreen foliage protects it from gusts of wind. The plant is rather accommodating; it tolerates slightly calcareous soils, sea spray, and even summer drought once established in deep soil. Plant this bush in partial shade, as it dreads scorching exposures.

The Garrya (x) thuretii is a bush in the garryaceae family. It is a horticultural hybrid resulting from the cross-breeding between Garrya elliptica and G. fadyenii obtained in Antibes in 1882 by Gustave Thuret. It grows rapidly, with a ramified and bushy habit, reaching on average 4m (13 ft 1 in) in height and 4.50m (14 ft 10 in) in spread at maturity. It is a dioecious bush, with female and male individuals, the latter being more cultivated in gardens due to their more decorative flowering. Its parents are native to forests on the west coast of the United States, particularly from an area that extends from southern Oregon to central California. It is a host of the chaparral, a shrubby formation similar to our Corsican maquis. It is a plant of a rather dry summer and relatively mild climate. The foliage, theoretically evergreen, will be damaged at the first frost.

The branches of Thuret's Garrya bear leathery elliptical leaves arranged in an opposite manner. They are 6 to 10cm (2.4 to 3.9 in) long and 2 to 3cm (0.8 to 1.2 in) wide, dark green and satin-like on the upper side, almost gray and pubescent underneath. The bush will be able to flower at the age of 5 or 6 years. Flowering usually takes place in February, or until March-April, depending on the climate. The inflorescences are long trailing aments that appear at the axils of the leaves. They are composed of a stack of small yellowish flowers enveloped in a silky bract, gray with silver reflections. The female aments are shorter and erect. The female plants will bear spherical berries of a purple-brown colour in the presence of male plants.

Well sheltered from cold winds, Garrya thuretii is hardy down to -10°C, in properly drained soil. So be vigilant with regards to heavy frosts. On the other hand, it will adapt very well to the mild oceanic climate offered by the Southwest and Brittany, where it will tolerate sea spray perfectly. It will also be more comfortable in a warmer urban garden that is better protected from cold winds than in a plain. Its behavior in a Mediterranean climate is also satisfactory, even without summer watering once well established, provided it is planted in partial shade and in deep soil. It is preferably planted as a free-standing hedge to make the most of its dark and dense branches, which often descend to the ground, illuminated by the pale aments. It can be associated with strawberry trees, tall Olearia, evergreen oaks, Photinias, Elaeagnus, and other Rhamnus alaternus to create an effective and decorative windbreak throughout the year.

Garrya x thuretii - Hybrid Garrya in pictures

Garrya x thuretii - Hybrid Garrya (Flowering) Flowering
Garrya x thuretii - Hybrid Garrya (Foliage) Foliage

Plant habit

Height at maturity 4 m
Spread at maturity 4.50 m
Habit Irregular, bushy
Growth rate fast

Flowering

Flower colour grey
Flowering time January to February
Inflorescence Spike
Flower size 20 cm

Foliage

Foliage persistence Evergreen
Foliage colour dark green

Botanical data

Genus

Garrya

Species

x thuretii

Family

Garryaceae

Other common names

Hybrid Garrya

Origin

Cultivar or hybrid

Product reference169431

Other Garrya

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Planting and care

Choose a suitable location for your Garrya thuretii, as it does not tolerate transplantation well. It will prefer a sunny spot in the north of the country, but partially shaded in hot climates. Choose a location sheltered from cold winter winds that could harm its hardiness and damage its beautiful flowering. Plant it in ordinary soil, but deep enough and well-drained. It is essential to add coarse sand and leaf compost to the planting hole if your soil tends to be clayey and compact. This plant is not very sensitive to soil pH, which can be slightly acidic, neutral, or slightly alkaline. Water generously (at least 1 11-liter watering can) but spaced out during periods of drought, for the first two or three summers. The bush will then do without watering, even in hot regions if it is well-rooted. Its hardiness is around -10°C (14 °F) at its most extreme, for a well-established plant in a sheltered position.

Protect your young bush with a thick mulch and winter protection in areas close to its hardiness limit or in case of severe frost. Optionally, apply a thick mulch around the base of the plant in summer to keep the soil cool. Do not prune your bush excessively, as it would affect its flowering. You can remove dead wood and some branches in April to rebalance its shape.

The main disease affecting Garrya is black spot, caused by a fungus that develops on the leaves in warm and humid weather. Avoid watering the foliage.

Planting period

Best planting time March to April
Recommended planting time March to June

Intended location

Suitable for Meadow, Woodland edge
Type of use Back of border, Hedge
Hardiness Hardy down to -9°C (USDA zone 8b) Show map
Ease of cultivation Amateur
Planting density 1 per m2
Exposure Sun, Partial shade
Soil pH Any
Soil type Silty-loamy (rich and light)
Soil moisture Dry soil, Moist soil, Deep, well-draining

Care

Pruning instructions Do not prune your bush excessively, as it would affect its flowering. You can potentially remove dead wood and some branches in March-April, depending on your region, to restore balance to its shape.
Pruning Pruning recommended once a year
Pruning time March to April
Soil moisture Dry soil, Moist soil
Disease resistance Average
Overwinter Can be left in the ground

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