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Hydrangea macrophylla So Long Rosy

Hydrangea macrophylla x serrata So Long® Rosy 'Coumont'

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Due to its hardiness, my choice for this spring is to plant in large wooden containers on my terrace.

Michèle, 22/10/2020

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This plant carries a 24 months recovery warranty

More information

This new hydrangea in the So long series has been selected for its extraordinary floriferous display from June to September. Its flowers, grouped in half-balls, range from soft pink to green. They bloom on this year's wood as well as on older stems, and are highly resistant to rain. The shrub has a compact, well-branched habit and is clothed in ample foliage. Hardy, it can be grown in a shady bed or in a pot on the terrace.
Flower size
13 cm
Height at maturity
1.10 m
Spread at maturity
85 cm
Exposure
Sun, Partial shade
Hardiness
Hardy down to -23°C
Soil moisture
Moist soil
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Best planting time April, October
Recommended planting time February to April, August to October
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Flowering time June to September
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Description

The 'So Long Rosy' is a new hybrid hydrangea series that combines the best qualities of its parent plants. This plant can resist cold weather and bloom on the current year's wood. It has beautiful inflorescences that shift from soft pink to chartreuse green. It blooms early and continually throughout the summer despite rain with well-coloured flowers. Its semi-spherical flower heads gradually evolve from pale pink to chartreuse green. The plant is not too big, compact, and well-branched, making it easy to fit in a small garden or container on the terrace. It grows best in semi-shade.

Hydrangea serrata are plants that thrive in cool and humid mountainous regions and are resistant to cold temperatures as low as -20°C (-4°F). They are less affected by late frosts compared to their large-leaved counterparts, all of which belong to the Hydrangeaceae family. The 'So Long Rosy' hortensia is a very bushy plant that can grow up to 1.10 m (3 ft 7 in) in height and 80 cm (31.5 in) in width, depending on the cultivation conditions. It starts to flower at a young age, and its hemispherical panicles, about 13 cm (5.1 in) wide, bloom from June. If the plant is pruned slightly after the first flowering, it will form new flowers during summer. This hydrangea has large, medium-green, ovate leaves with a dentate border, which fall in autumn. It's worth noting that hydrangeas are sturdy plants that can survive for at least 50 years.

Hydrangea So Long Rosy is the perfect plant for adding a romantic touch to your garden. This plant thrives in fresh soils and semi-shaded areas, making it perfect for placing near the house, on the terrace, or near the entrance. You can also place it on the east or west side, as long as it is not in direct sunlight. Even if they are not fond of limestone, hydrangeas are not strictly ericaceous plants, they like humus-rich, fertile and fresh soils. Pair them with other plants such as fuchsias magellanica, annual impatiens, lilies, Pieris, Sarcococca, or plant spring-flowering bulbs in front of their round shape. You can admire their beautiful and long-lasting flowers in your garden or even indoors. Their dried flowers look great in bouquets, so don't be too quick to put them on the compost heap after they have bloomed.

Hydrangea macrophylla So Long Rosy in pictures

Hydrangea macrophylla So Long Rosy (Flowering) Flowering
Hydrangea macrophylla So Long Rosy (Foliage) Foliage
Hydrangea macrophylla So Long Rosy (Plant habit) Plant habit

Plant habit

Height at maturity 1.10 m
Spread at maturity 85 cm
Habit Irregular, bushy
Growth rate normal

Flowering

Flower colour pink
Flowering time June to September
Inflorescence Cyme
Flower size 13 cm
Good for cut flowers Cut flower blooms

Foliage

Foliage persistence Deciduous
Foliage colour medium green

Botanical data

Genus

Hydrangea

Species

macrophylla x serrata

Cultivar

So Long® Rosy 'Coumont'

Family

Hydrangeaceae

Origin

Cultivar or hybrid

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Planting and care

To plant the So Long Rosy hydrangea, choose a slightly shaded spot in spring or early autumn, such as against an east-facing or northern wall. Keep it away from cold winds and the sun. It prefers deep, fresh, well-drained, and relatively fertile soil, but ericaceous soil is unnecessary. You can enrich the soil with a good base fertiliser before planting. If the soil is dry at the foot of the wall, plant the root ball at least 30-40 cm (11.8-15.7 in) away from the base and add well-rotted compost to improve soil freshness. This plant is resilient and can be planted in cold areas. When pruning, remove the faded flowers on the first or second bud. To encourage the formation of young shoots, cut back a quarter or a third of the oldest stems to the base when the plant matures. Prune every year in March or April.

Planting period

Best planting time April, October
Recommended planting time February to April, August to October

Intended location

Suitable for Woodland edge
Type of use Border, Free-standing, Container, Hedge
Hardiness Hardy down to -23°C (USDA zone 6a) Show map
Ease of cultivation Beginner
Planting density 1 per m2
Exposure Sun, Partial shade
Soil pH Acidic, Neutral
Soil type Silty-loamy (rich and light)
Soil moisture Moist soil, well-drained, rich

Care

Pruning instructions Remove any wilted flowers on the first bud or pair of buds located directly below to keep your plant healthy. When the plant is mature, cut back a quarter or a third of the oldest stems to promote the formation of young shoots. It's recommended to carry out this pruning every year during March and April.
Pruning Pruning recommended once a year
Pruning time March to April
Soil moisture Moist soil
Disease resistance Very good
Overwinter Can be left in the ground
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