Polygala myrtifolia
Polygala myrtifolia
Polygala myrtifolia
Polygala myrtifolia
Polygala myrtifolia
Polygala myrtifolia
Polygala myrtifolia
Polygala myrtifolia
Sweet Pea Shrub, Myrtle-leaf Polygala
Since I've been ordering from Promesse de fleurs, I've never been disappointed. The polygala I received was already in flower, and its growth is magnificent. A site I'd recommend to all gardeners.
Gérard, 01/04/2025
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Description
Polygala myrtifolia, also known as the Myrtle-leaf Milkwort, is undoubtedly the most widely planted species of Polygala in our gardens in very mild climates, but also on our patios. Its popularity is due to its ease of cultivation, its hardiness, but also to its remarkable number of flowers and length of flowering. Its evergreen vegetation is light but dense, bushy and nicely rounded. In successive waves, it produces beautiful clusters of small bicolored pea flowers, white and pink-violet, sometimes all year round. An enjoyable bush from all points of view, essential in mild climates and by the seaside.
The Myrtle-leaf Milkwort is an evergreen shrub plant from the large family Polygalaceae, native to South Africa. Its natural environment, which is very variable, consists of different types of open areas, such as heathlands, cliffs, dunes, shrubland and even along streams. It forms a beautiful bush of 2m (7ft) in all directions within 3 to 4 years. While its growth is fast, its lifespan is limited. This Polygala, like many others, ensures its longevity by self-seeding, sometimes abundantly, in the most unexpected places in the garden, in favourable climates and soils. Its flowering is very vibrant, lasting about 10 months, from April-May to autumn. The flowers, gathered in terminal clusters, are papilionaceous like those of the legumes. They consist of 2 winged sepals in pink-violet and a lower petal in white-green strongly tinged with violet. The stamens emerge from the flower, forming a tuft of the same shade. The foliage is evergreen, with green or purplish branches. The small leaves are rounded to ovate, pointed at their tips, tender green and sometimes tinged with purple, 2 to 3cm (1in) long, with a more pronounced midrib. The fruit is a small winged capsule, sometimes difficult to spot on the bush.
This Polygala will find its place in small hedges, Mediterranean shrub beds, rockeries, in not too cold climates, in the company of Melaleuca, Leptospermum, Medicago arborea, evergreen Ceanothus, Abelia and Escallonia. It will withstand -5°C, in well-drained soil. Elsewhere, it can be displayed in large pots that can be brought indoors in winter to protect them from frost. It is content with ordinary but very well-drained soil and a sunny position. It is highly recommended for coastal gardens, as it is very tolerant of strong winds and soil and air salinity.
Polygala myrtifolia in pictures
Plant habit
Flowering
Foliage
Botanical data
Polygala
myrtifolia
Polygalaceae
Sweet Pea Shrub, Myrtle-leaf Polygala
South Africa
Planting and care
Grow the myrtle-leaved Polygala in a beautiful ceramic pot or large container to enjoy its flowers on your balcony or patio. This plant, which is not very hardy, can only be grown in the ground in the mildest Mediterranean and coastal regions, where temperatures do not drop below -5°C (23°F). In a very sheltered position, it may be slightly hardier. In colder regions, growing it in a container allows the plant to overwinter in a bright, unheated, frost-free room. Winter protection fleece can increase hardiness for plants grown in the ground. Polygala prefers sunny locations and adapts to any soil, acidic, neutral, alkaline, moist or dry, as long as it is well-drained. Place a mixture of 1/3 garden soil, 1/3 compost, and 1/3 coarse sand or gravel in the planting hole or pot. It is preferable to water regularly during hot periods, but this plant, when grown in the ground, tolerates drought fairly well.
Propagation is easy by sowing the plant's own seeds, but sometimes they can be difficult to find on the bush.
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.