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Hydrangea quercifolia Harmony

Hydrangea quercifolia Harmony
Oakleaf Hydrangea, Oak-leaved Hydrangea

4,9/5
15 reviews
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Disappointed with the appearance of the hydrangea, leafless and very scrawny. I hope it will develop properly.

eric, 15/10/2024

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This plant carries a 24 months recovery warranty

More information

Value-for-money
Hydrangea quercifolia Harmony is a sumptuous hydrangea with large oak-like leaves and big off-white panicles that redden in autumn.
Flower size
30 cm
Height at maturity
1.80 m
Spread at maturity
2 m
Exposure
Sun, Partial shade
Hardiness
Hardy down to -15°C
Drought resistance
Average
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Best planting time March, October
Recommended planting time February to April, September to October
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Flowering time July to October
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Description

Hydrangea quercifolia Harmony is a very unique hydrangea with its oak-like leaves and its long, generous flowering with large, very compact 30 cm (11.8 in) white panicles. With its bushy habit, it is ideal for pot cultivation on balconies and terraces.

Also called Oakleaf Hydrangea, it has large deciduous and dentate dark green leaves, 30 cm (11.8 in) long, that turn a purplish red in the autumn. From August to October, pyramidal inflorescences, 30 cm (11.8 in) long and 20 cm (7.9 in) wide, form large panicles of sterile flowers in an off-white colour that turns reddish in the autumn. Hydrangea quercifolia flowers on old wood.

Hydrangea quercifolia Harmony is not very ramified and grows slowly up to 2.5 m (8 ft) in height and width. It appreciates a light, well-drained, fresh soil, in a sunny location but one that is always sheltered from cold and dry winds. Mix heath soil with your garden soil. It is a hardy shrub that is easy to grow and requires little maintenance.

Hydrangea quercifolia Harmony should be placed in the sun or partial shade. Pair it with other hydrangeas, ferns, lamiums or conifers for a beautiful contrast.

Advice: Hydrangeas do not need pruning to flower. Remove dead wood and faded flowers at the end of winter. Be careful! Hydrangea quercifolia takes a long time to reflower after hard pruning!

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Hydrangeas: planting, pruning and care
Family sheet
by Alexandra Lambert, experte plantes et jardin 20 min.
Hydrangeas: planting, pruning and care
Read article

Hydrangea quercifolia Harmony in pictures

Hydrangea quercifolia Harmony (Flowering) Flowering
Hydrangea quercifolia Harmony (Foliage) Foliage
Hydrangea quercifolia Harmony (Plant habit) Plant habit

Plant habit

Height at maturity 1.80 m
Spread at maturity 2 m
Habit irregular, bushy
Growth rate normal

Flowering

Flower colour white
Flowering time July to October
Inflorescence Panicle
Flower size 30 cm
Good for cut flowers Cut flower blooms

Foliage

Foliage persistence Deciduous
Foliage colour medium green

Botanical data

Genus

Hydrangea

Species

quercifolia

Cultivar

Harmony

Family

Hydrangeaceae

Other common names

Oakleaf Hydrangea, Oak-leaved Hydrangea

Origin

Cultivar or hybrid

Product reference • 96281

Planting and care

Hydrangea quercifolia Harmony is planted in spring or autumn in a fresh, humus-bearing and well-drained soil. It appreciates a semi-shaded or sunny exposure depending on the humidity of the soil. Mulch the soil with pine bark to maintain freshness and acidity. Prune the dried flowers on the young plant after frosts in order to protect future shoots. Every two years, prune one stem out of every three to rejuvenate the hydrangea. Be careful: the flowers only form on old wood! The plant's spring vegetation appears rather late.

Planting period

Best planting time March, October
Recommended planting time February to April, September to October

Intended location

Suitable for Meadow, Woodland edge
Type of use Back of border, Free-standing, Cut flowers
Hardiness Hardy down to -15°C (USDA zone 7b) Show map
Ease of cultivation Amateur
Exposure Sun, Partial shade
Soil pH Acidic, Neutral
Soil type Clayey (heavy), Silty-loamy (rich and light)
Soil moisture Moist soil, well-drained

Care

Pruning instructions L’hortensia à feuilles de chêne ‘Harmony’ fleurit sur les rameaux formés l’année précédente. Au printemps, attendez le démarrage de la végétation pour repérer et couper le bois mort. Si vous souhaitez enlever les panicules sèches, coupez juste au-dessus de la première paire de bourgeons bien formés. Si une branche gêne le passage, raccourcissez-la juste après la floraison pour préserver autant que possible celle de l’année suivante.
Pruning Pruning recommended once a year
Pruning time March to April
Soil moisture Moist soil
Drought resistance Average
Disease resistance Very good
Overwinter Can be left in the ground
4,9/5
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