Arabis caucasica Alabaster
Arabis caucasica Alabaster
Arabis caucasica Alabaster
Arabis caucasica Alabaster 'Inaraalaba'
Mountain Rock Cress, Alpine Rock Cress, Alpine Rockcress, Caucasus Rockcress, Wall Rock Cress
Received in November 23, planted immediately. 2 young plants out of 3 taken.
Emilie , 31/05/2024
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Description
The Arabis caucasica 'Alabaster' is a first-class hybrid for winter and spring decoration for pots and containers on balconies and terraces. This perennial with a spreading habit is very decorative thanks to its long-lasting flowers in alabaster white.
The 'Alabaster' Caucasian Rock Cress is a sterile hybrid, recently created in Germany: it is unique in that it has larger flowers and a longer flowering period than other varieties, as it does not wear itself out producing seeds. These qualities make it particularly suitable for use in pots and containers, combined with other biennials such as pansies, primroses, violas...unlike these, it is a perennial and can be replanted in the garden after flowering. Its superb pure white colour, simple and elegant, will brighten up any display!
A very hardy perennial plant, the Arabis alpina subsp. caucasica 'Alabaster' forms a cushion of evergreen foliage with a grey-green colour. Planted in autumn, it develops during winter to form a perfectly round ball, which will be covered with flowers from mid-March to mid-May. Typical of the Brassicaceae family (also known as "Crucifers"), the flowers are formed by 4 cross-shaped petals. They reach nearly a centimetre in diameter and completely cover the foliage during two months of uninterrupted flowering!
Native to the Caucasus Mountains, the rock cress thrives in well-drained soil or compost in full sun and requires little water. In the garden, it will colonize rockeries and low flowering walls without overwhelming them, and can be used as ground cover or as a border plant. This early and very easy-to-grow perennial combines well with basket-of-gold (Alyssum saxatile) and snow-in-summer (Cerastium tomentosum) which follow in its footsteps, as well as wallflowers, wall bellflowers, perennial stocks, candytufts, etc...
Note: Attention, our young plug plants are professional products intended for experienced gardeners: upon receipt, transplant them as soon as possible, in pots, containers, or directly in flower beds.
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Arabis caucasica Alabaster in pictures
Flowering
Foliage
Plant habit
Botanical data
Arabis
caucasica
Alabaster 'Inaraalaba'
Brassicaceae
Mountain Rock Cress, Alpine Rock Cress, Alpine Rockcress, Caucasus Rockcress, Wall Rock Cress
Cultivar or hybrid
Planting and care
The young plug plants of Arabis caucasica 'Alabaster' should be planted in pots and containers or directly into the ground in well-prepared and improved soil. Plant them as soon as possible after receiving them, in September-October. If the intended location is not yet ready or the conditions are not favourable for planting (heavy rain or excessively dry soil), you can let them grow on in pots for 4 to 6 weeks. After planting, you can lightly pinch out the tip of the plant between your thumb and forefinger to remove the terminal bud and stimulate branching (optional).
In pots and containers, use a good, well-draining compost for flowering plants (with a lot of bark or perlite, for example) and enriched with slow-release fertilizer. The top of the root ball should be level with the soil. Water thoroughly at planting and during the following weeks, as the young plants can dry out quickly. However, do not overwater! Use containers with drainage holes and empty the saucer 10 minutes after watering. Remember to water, even during winter, if it doesn't rain or if the container is placed in a sheltered spot. Do not water during frosty periods.
Once growth starts up again, in late February or early March, and throughout the flowering period, apply a liquid fertilizer for flowering plants 1 to 2 times a week when watering. Once flowering has finished, the plants in pots can be replanted in the garden in full sun.
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.