Ceanothus pallidus Marie-rose
Ceanothus pallidus Marie-rose
Ceanothus pallidus Marie Rose®
California Lilac
Planted at the end of March 2025 in soil (not very rich), it has developed well in height, reaching 50 cm as of September 2025. It should reach its maximum height, foliage density and flowering in spring/summer 2026.
marc, 20/09/2025
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Description
Ceanothus pallidus 'Marie-rose'®, also known as the summer ceanothus, is a compact deciduous bush with tender green foliage and pale pink flowers.
Derived from the pallidus species, native to North America and Mexico, this deciduous bush reaches a height of 1.50m (4ft 11in) and a width of 1m (3ft 4in) after 10 years, and can tolerate temperatures as low as -15°C. Its upright purple branches form a compact bushy tuft. It has alternate, entire, toothed, tough leaves, a beautiful shiny tender green colour, and very pronounced veins.
In June-July, light pale pink clusters, 7 to 10cm (2.8 to 3.9in) long, composed of small tubular flowers, adorn the ends of the stems, followed by dark red fruits. Cutting the fruits triggers a second flowering in September-October. The unique fruiting prolongs the interest of the bush for the following 2 months.
Ceanothus belong to the Rhamnaceae family, they are cousins of our buckthorn (Rhamnus cartharicata), but they are hosts of chaparral, scrub vegetation, and garrigues, which rely on rainwater once established. They are also called "California lilacs". Ceanothus pallidus 'Marie-rose'® is a more compact and floriferous improvement of Ceanothus x pallidus 'Marie Simon', created by Pépinières Minier (France) in 2006. Hybridization has resulted in plants that are less cold-sensitive (-15°C) and whose resistance can be further improved by cutting back the tuft in winter and mounding the base. Pruning, although not essential, also reduces the volume of the bush to between 1m (3ft 4in) and 1.50m (4ft 11in). In mild climates, Ceanothus pallidus 'Marie-rose'® can even retain its foliage, not to mention its tolerance for slightly calcareous soil, unlike evergreen species.
It thrives in light, well-drained soil, with little limestone, in a sunny or semi-shaded location. Not demanding, simply cutting back the stems to 5cm (2in) from the old wood in early April will promote harmonious growth of the bush.
The 'Marie-rose' Ceanothus forms a graceful bush, easy to grow in temperate climates, that you can mix with perennials for dry soil such as yarrow or Gaura. It can also be associated with flowering hedges, borders, or rock gardens, with small, easy-to-grow bushes that will precede or follow its beautiful flowering: rockroses, Perovskia, Teucrium, rosemary, and lavender. It will also thrive by the sea. This variety will also enhance your balconies and terraces when planted in a large container.
Ceanothus pallidus Marie-rose in pictures
Plant habit
Flowering
Foliage
Botanical data
Ceanothus
pallidus
Marie Rose®
Rhamnaceae
California Lilac
Cultivar or hybrid
Planting and care
Ceanothus pallidus 'Marie-rose'® is preferably planted in spring in a light, well-drained soil, in a sunny or partially shaded position. It tolerates slightly chalky soil unlike evergreen species. It is an easy plant to grow as long as the soil does not retain stagnant moisture in winter. Additionally, it withstands drought once well established. Except during the first summer following planting, it is unnecessary and even discouraged to water.
Potted plants are more vulnerable and require regular but spaced watering and fertilization. Add a handful of compost, organic fertilizer or slow-release fertilizer every spring and flower fertilizer after summer pruning of the fruits. Use a lightweight substrate, a mixture of garden soil, coarse sand and potting soil.
The search for hybrids has resulted in Ceanothus more resistant to cold (-15°C) which can be further protected by cutting back the tuft in winter and mounding the base. This pruning keeps the bush at a low volume between 1m (3ft 4in) and 1.50m (4ft 11in). In mild climates, this species is semi-evergreen.
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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