Acacia retinodes
Acacia retinodes
Acacia retinodes
Acacia retinodes
Swamp Wattle, Water Wattle, Wirilda, everblooming acacia
Beautiful quality four-season mimosa plant. Very carefully packaged. I recommend it.
François , 01/01/2026
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Description
The Acacia retinodes, commonly known as the Four-Seasons Mimosa, should not be confused with the tree we call acacia, which is part of the Robinia botany genus. It is a large evergreen bush that flowers several times in the year, with a predominance from May to November. It produces numerous clusters bearing small characteristic flowers, evoking tiny yellow pom-poms, with a unique fragrance, highly prized in floral art. Its light foliage consists of bright green flattened, very thin and elongated petioles. This mimosa is not very hardy, but it tolerates poor and calcareous soils well, drought, and does not produce suckers. It will form a magnificent specimen in a large pot, to be stored in the winter in cold regionsor in the open ground in mild climates.
The Acacia retinodes is a bush native to Australia, belonging to the fabaceae family, just like alfalfa and lupins. This small tree or large bush has a rounded and compact habit, reaching 4 m (13 ft 1 in) in all directions at adult age. Its growth is quite fast. The bark, of a reddish brown, cracks as it ages. Its flowering is irregular from January to December, but particularly abundant from May to November. Its small round flowers are bright yellow stamen glomerules and are gathered on axillary racemes. Their scent is recognisable among all: an initial very fresh herb fragrance gives way to a divine honey scent, a powdery fragrance. Its foliage consists of flattened petioles, which we call phyllodia, resembling long and lanceolate green leaves. The plant easily self-sows in acidic soil and often serves as a graft for other species and varieties thanks to its good tolerance of calcareous soil. Its hardiness does not exceed -6°C (21.2 °F), but its resistance to summer drought is excellent.
When planted in open ground in mild climates, the Four-Seasons Mimosa can be placed as a stand-alone, in a hedge or row, or as a plant screen because of its capacity to conceal. It can be combined with other exotic-looking frost-sensitive bushes such as the Caesalpinia gilliesii, the Jacaranda mimosifolia (Blue Flamboyant), the Sesbania punicea, the escallonias, or the Coleonema album. It can be grown in a pot provided that it is protected from winter frosts in a greenhouse or a very slightly heated veranda.
Acacia retinodes in pictures
Plant habit
Flowering
Foliage
Botanical data
Acacia
retinodes
Fabaceae
Swamp Wattle, Water Wattle, Wirilda, everblooming acacia
Australia
Planting and care
The Acacia retinodes is preferably planted in the spring, in March or April, in a very sunny location sheltered from strong winds; autumn planting is limited to mild climates. Due to its superficial roots,it is best to stake the all-seasons mimosa at the time of planting to keep it upright and allow its roots to establish. This bush is not fussy about soil types provided that they are fairly well-drained. As it tolerates drought well, watering is not necessary when grown in open ground. Although optional, light pruning is advised, especially if the tree is slightly exposed to the wind: after the bulk of the flowering, in December, shorten the branches that have flowered by about half their length. This operation will prevents the formation of pods that unnecessarily exhaust the plant. Pruning can also be carried out in Spring to remove branches that have suffered from the cold and rebalance the habit of the bush. As mimosa are averse to the cold, it is advisable to spread a thick layer of mulch at their base and cover them with a winter cloak as soon as temperatures drop close to 0°C.
If growing a Mimosa in a pot, repot it into a larger container every two years, in the spring. Water from time to time, the root ball should not dry out completely. In cold regions, it should be wintered in a bright and cool but frost-free place.
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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