Abutilon megapotamicum
Abutilon megapotamicum
Abutilon megapotamicum
Abutilon megapotamicum
Abutilon megapotamicum
Abutilon megapotamicum
Abutilon megapotamicum
Abutilon megapotamicum
Abutilon megapotamicum
Abutilon megapotamicum
Abutilon megapotamicum
Trailing Abutilon
After a very good delivery, the abutilon planted in June has taken well and flowered well despite the drought. Now, in October, it is still very green and has put on good growth. I am about to move it, and I hope it will tolerate that well.
M-L, 17/11/2025
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Description
The Abutilon megapotamicum is a vigorous bush, fond of heat and relatively easy to cultivate in open ground in mild climates, or in a pot in cooler climates. Forming a mass of fine arching branches, drooping or climbing if trained, it tirelessly produces curious yellow and red bicoloured flowers that hang from the axil of each leaf on a long peduncle. Evergreen to semi-evergreen depending on the climate, hardy down to -10°C (14°F) in sheltered positions, this generous bush, hailing from tropical and subtropical areas of South America, perfectly embodies exoticism.
The Abutilon megapotamicum, also known as the Grand River Abutilon or trailing abutilon, is a bush native to southern Brazil and Uruguay that exists in two forms: a spreading bush whose branches naturally layer, eventually forming a large ground cover or a large vigorous bush composed of slender, arching branches, reaching 2m (6 in 7 ft) in all directions, or more, with relatively slow growth. Belonging to the family Malvaceae, this cousin of lavateras and hibiscus is also a very floriferous plant, undemanding in terms of soil type. Flowering occurs abundantly from June until the first frost. The flowers bloom from the axil of the leaves, suspended on a long peduncle. They are composed of 5 bright red fused sepals, gradually revealing 5 bright yellow petals and prominent purple-violet stamens. The evergreen to semi-evergreen foliage (killed at around -5°C), is composed of alternate, oblong to ovate, cordate-based, light and vibrant green leaves.
Hardier than it seems, the Abutilon megapotamicum is capable of regrowing from the stump after enduring short frosts of around -10°C (14°F), if planted in a very sheltered position, against a south-facing wall for example. It can therefore be planted in open ground, under these conditions. Elsewhere, it is easily grown in a large pot that can be placed on a terrace from April to October and protected from severe cold in winter. It pairs well with Solanum rantonetti or jasminoides, Sollya heterophylla, Bignonia capreolata, the Black-eyed Susan vine, and other generous climbers with exotic charm but relatively hardy.
Abutilon megapotamicum in pictures
Plant habit
Flowering
Foliage
Botanical data
Abutilon
megapotamicum
Malvaceae
Trailing Abutilon
South America
Planting and care
Plant Abutilon megapotamicum in spring or autumn in mild climates, in a well-sheltered and sunny position, in a well-drained but moist, loose, fertile soil. This abutilon tolerates the presence of limestone in the soil, but it is not a plant for dry land. Dig a deep planting hole and add some garden soil, a little compost, and sand to improve the soil quality if necessary. Water abundantly after planting and during hot summer periods. Train the abutilon on a trellis or wire mesh, as this shrub will not attach itself to its support. Abutilon shows a strong sensitivity to slugs and snails, aphids, and powdery mildew.
It is easily propagated by putting young stems in water: rooting takes place after about 3 weeks. Once the roots have appeared, it is necessary to wean them, which means transferring the cutting to a medium composed of damp potting soil (place a saucer under the pot), which will gradually dry out over a period of about 15 days.
Pot cultivation:
Choose a large pot with drainage holes at the bottom and a volume of 30 to 50 litres. Ensure good drainage by placing a layer of gravel, broken terracotta shards, or clay pellets at the bottom. Fill with a mixture consisting of half garden soil, a quarter leaf compost, and a quarter coarse sand. The growing medium should be rich in nutrients and kept moist throughout the growing season. Abutilon requires regular watering during the hottest months and regular application of flowering plant fertilizer from May to September. In winter, reduce watering and stop feeding. Store the plant in a bright, unheated room, frost-free.
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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