Hydrangea heteromalla
Hydrangea heteromalla
Hydrangea heteromalla
Hydrangea heteromalla
Hydrangea heteromalla
Hydrangea heteromalla
Hydrangea heteromalla
Himalayan Hydrangea
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This plant carries a 24 months recovery warranty
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We guarantee the quality of our plants for a full growing cycle, and will replace at our expense any plant that fails to recover under normal climatic and planting conditions.
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Description
The Hydrangea heteromalla is a beautiful botanical hydrangea that originates from the Himalayas. Despite its striking appearance and ease of care, it is not commonly found in gardens. This large bush has dark green foliage that turns autumnal hues and produces frothy, flattened flower heads that range from white to pink. These flowers remain decorative for a long time, making this species an excellent choice for large spaces as a backdrop. It is easy to grow in ordinary soil but prefers moist conditions.
Originating from the Himalayas, distributed in an area ranging from Nepal to the north of India, the Hydrangea heteromalla is a wild species of open forest habitat that also appreciates mountain slopes and can climb up to 2000m (6561 ft 8 in) in altitude. It is a large bush that needs light and minimal sun to flower well. It tolerates both cold (-20°C (-4 °F)) and heat (in a more shaded situation). It belongs to the hydrangea family and is a close relative of the large-leaved hydrangeas with ball-shaped inflorescences that need no introduction.
The heteromalla hydrangea grows slowly but forms a beautiful bush with a sprawling, rounded silhouette. It has upright main branches bearing flexible secondary branches, giving it a bushy habit. At maturity, it reaches a height of about 3.50m (11 ft 6 in) and a width of 3m (9 ft 10 in). This hydrangea has many-branched stems. The bark, initially hairy, flakes off over time and becomes almost corky and grey-brown.
The abundant and long-lasting flowering usually occurs on the previous year's branches at the end of June or the beginning of July. The flower head is flat, wide, and 15 to 25cm (5.9 to 9.8 in). It comprises a few sterile flowers with 4 white petals, forming an irregular and sparse crown around the smaller fertile flowers. The latter, much more numerous, open into tiny white flowers with prominent stamens that often turn pink after pollination by insects.
This hydrangea has deciduous foliage that disappears in winter. The foliage consists of long oval leaves, which are 10 to 15cm (3.9 to 5.9 in), carried by a red petiole. The leaves are slightly hairy, dark green on the upper side, almost white on the underside, and marked with fairly deep veins. The foliage takes on red colours during the summer (depending on exposure) before turning orange and purple in autumn.
Once well established, this magnificent bush requires very little care other than regular watering in dry summers. It likes lightly shaded or partially shaded areas, but it is one of the few, along with the Hydrangea quercifolia and H. aspera sargentiana, to be more tolerant of the presence of limestone (without excess) in the soil. Naturally, it will also thrive in an ericaceous bed alongside other hydrangeas, Pieris, or Chinese Azaleas. The Hydrangea heteromalla allows you to create a superb backdrop, to flower a free hedge with fragrant viburnums, or large deciduous euonymus. Also, place it at the edge of a grove or woodland. But preferably plant it near a pathway, as it would be a shame not to enjoy its presence and unique personality.
Hydrangea heteromalla in pictures
Plant habit
Flowering
Foliage
Botanical data
Hydrangea
heteromalla
Hydrangeaceae
Himalayan Hydrangea
Himalayas
Planting and care
If you want to plant your Hydrangea heteromalla, choose a spot that's semi-shaded or gets mild sun. If your soil is chalky, dig a hole and fill it with a mixture of garden soil, leaf compost, and ericaceous soil. This variety usually grows well in ordinary, deep, and well-loosened soil that stays fresh in summer. Adding well-decomposed manure or compost can be helpful. Ensure to water it a lot when you plant it and during the first two years. In case of drought, water it a few times during the summer and mulch the base in hot regions.
This hydrangea variety must be planted in the ground as it can't be grown in pots. It's a robust plant that requires little maintenance once it's established. Don't prune it as it blooms on one-year-old wood. Make sure to allocate enough space, as it can grow up to 3 metres (9 feet 10 inches) wide!
Planting period
Intended location
Care
Planting & care advice
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Hardiness is the lowest winter temperature a plant can endure without suffering serious damage or even dying. However, hardiness is affected by location (a sheltered area, such as a patio), protection (winter cover) and soil type (hardiness is improved by well-drained soil).
In temperate climates, pruning of spring-flowering shrubs (forsythia, spireas, etc.) should be done just after flowering.
Pruning of summer-flowering shrubs (Indian Lilac, Perovskia, etc.) can be done in winter or spring.
In cold regions as well as with frost-sensitive plants, avoid pruning too early when severe frosts may still occur.
The harvesting period indicated on our website applies to countries and regions in USDA zone 8 (France, England, Ireland, the Netherlands).
In colder areas (Scandinavia, Poland, Austria...) fruit and vegetable harvests are likely to be delayed by 3-4 weeks.
In warmer areas (Italy, Spain, Greece, etc.), harvesting will probably take place earlier, depending on weather conditions.
The sowing periods indicated on our website apply to countries and regions within USDA Zone 8 (France, UK, Ireland, Netherlands).
In colder areas (Scandinavia, Poland, Austria...), delay any outdoor sowing by 3-4 weeks, or sow under glass.
In warmer climes (Italy, Spain, Greece, etc.), bring outdoor sowing forward by a few weeks.
The planting period indicated on our website applies to regions in USDA Zone 9a (East Coast and Midlands: Dublin, Wexford, Waterford, Kilkenny, Portlaoise). It will vary depending on where you live:
- On the west coast and in the north-west (Galway, Limerick, Sligo, Donegal, Westport), delay planting by 1 to 2 weeks in spring and bring it forward by 1 to 2 weeks in autumn compared to the dates given, preferably choosing periods without strong winds.
- In the inland hills and plateaus (Wicklow Mountains, Macgillycuddy’s Reeks, Connemara, Killarney), it is best to plant in spring (April–May) or autumn (September–October), avoiding periods of waterlogged soil in winter and strong winds, which pose the main risk to newly planted trees in these areas.
The flowering period indicated on our website applies to regions in USDA Zone 9a, such as the East Coast and Midlands, including Dublin, Wexford, Waterford, Kilkenny and Portlaoise.
This will vary depending on where you live:
- On the west coast and in the northwest (Galway, Limerick, Sligo, Donegal and Westport), it will be delayed by one to two weeks compared to the given dates, due to stronger Atlantic winds and less spring sunshine.
- In the inland hills and plateaus (the Wicklow Mountains, the Macgillycuddy's Reeks, Connemara and Killarney), flowering will be delayed by two to three weeks. Flowering mainly occurs between May and July, with the limiting factors being less frost and more of the excessive humidity, strong winds and lack of sunshine that are characteristic of these areas.
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