Aubrieta Royal Red - Seeds
Aubrieta Royal Red - Seeds
Aubrieta x cultorum Royal Red (Royal Series)
Rock cress, Garden Aubrieta, Purple Rock Cress
Sowing a little late to make up for a disastrous batch of soapwort from another site, but not in open ground. In the conservatory the heat made them germinate in 3 days, which is great. To be continued. Bear in mind they are very small and there isn’t much in the packet, which can be surprising. But the germination rate is reasonable.
Jolenska, 16/05/2025
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Description
Aubrieta or Rock Cress is an easy to grow, spring flowering perennial. 'Cascade Mix' produces brightly coloured carpets of flowers in various shades of pink, purple, mauve or red with semi-evergreen, greyish-green foliage. Although fairly short-lived, they flower profusely from March to May-June. Perfect for growing between paving stones, over low retaining walls or alongside taller plants in large pots and containers. Rock cress enjoys moist, well-drained soil and plenty of sun.
Aubrieta or Rock Cress belongs to the Brassicaceae family. Most of the hybrid cultivars are selected from Aubrieta deltoidea, a species which is native to south-eastern Europe and Turkey. These rhizomatous plants have a compact, mat-forming habit, producing 15 cm high cushions which rapidly spread out to over 60 cm in diameter. Their oval, silvery-green leaves are semi-evergreen to evergreen depending on the climate. They end in a point and have coarsely toothed margins. In spring, from late March to late May, they are buried under masses of small, four-petalled flowers in shades that range from pink to purple. Aubrieta is a very cold-hardy plant that can withstand temperatures as low as -20°C.
With its uniform, mat-forming habit, Rock Cress is ideal for borders and edging. It is not very fussy when it comes to soil types, provided it is not too dry. It is suitable for rock gardens or for growing over low retaining walls, where it forms very attractive drifts of colour. It will soon colonise sunny slopes, gaps between paving stones or dry-stone walls and is equally suited to growing in pots or hanging baskets.
Flowering
Foliage
Plant habit
Botanical data
Aubrieta
x cultorum
Royal Red (Royal Series)
Brassicaceae
Rock cress, Garden Aubrieta, Purple Rock Cress
Aubrieta deltoidea 'Royal Red'
Cultivar or hybrid
Planting and care
Sow from late spring to early summer in moist, well-drained sowing mix or compost. Lightly cover the seeds. Place in a propagator or inside a polyethylene bag until germination (usually 14-21 days at 18°C).
When the seedlings are strong enough to handle, transplant them into pots before planting them out in their final location. Make sure to leave about 30 cm between each plant.
Sowing period
Intended location
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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