Collection of Phormiums for an exotic bed
Collection of Phormiums for an exotic bed
Phormiums tenax, cookianum Purpureum, Black Adder
New Zealand flax, harakeke, wharariki
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Description
This collection of Phormiums for exotic borders consists of three varieties carefully selected for their ease of cultivation and ornamental qualities. These plants, known as "New Zealand Flax," are distinguished by their evergreen foliage in various colours. These robust perennials are appreciated for their hardiness and low water requirements, although they have limited cold resistance.
Collection details:
x 1 Phormium tenax: a botanical species with upright green leaves, reaching up to 2m in height. Its summer flowering takes the form of a tall spike adorned with reddish flowers.
x 1 Phormium tenax 'Purpureum': this variety develops upright purple leaves, with the plant reaching about 1.5m in height. Its summer flowering is similar to that of Phormium tenax.
x 1 Phormium 'Black Adder': a variety with very dark, almost black foliage, reaching up to 1.2m in height. Its flowers are red or orange.
Plant these Phormiums in spring or autumn to promote good root growth. They thrive in borders, beds, or pots. Place the tallest plants, such as Phormium tenax, at the back of the border. Arrange the 'Black Adder' and 'Purpureum' Phormiums at the front of the border to create a sense of depth. Maintain a spacing of 70cm between each plant to allow for proper development. For a mass effect, plan for 2 to 3 plants per square metre.
Phormiums pair well with plants with similar needs, such as Agapanthus, Cordylines, and tall grasses like Panicum. Beautiful Miscanthus sinensis 'Purpurascens'. Agapanthus, with their blue or white flowers, add a complementary touch of colour and can be placed at the front of the borders. Cordylines, with their habit and architectural foliage, can be mixed with Phormiums to reinforce the exotic effect. Grasses add movement and lightness and should be planted in the background. All these plants will create a harmonious and dynamic border requiring very little maintenance.
Plant habit
Flowering
Foliage
Botanical data
Phormiums
tenax, cookianum
Purpureum, Black Adder
Asphodelaceae
New Zealand flax, harakeke, wharariki
Cultivar or hybrid
Planting and care
Phormium thrives in the sun in well-drained, rich soil that does not become waterlogged. Once well-rooted, it withstands summer drought fairly well. It can tolerate winds and sea spray, but shelter it from cold north winds. When planting in spring, add compost, coarse sand such as river sand, or gravel. In winter, protect the bush with winter fleece. Phormium can withstand brief frosts of around -8/-10 °C once mature. It does not require any particular pruning. Only remove dried leaves and faded flower stalks. Do not overwater, only in case of drought. This plant has few enemies, as it does not attract predators.
Phormium grows well in a large pot, which allows it to be overwintered in a very bright, unheated but frost-free room.
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).
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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.