Lobularia maritima 'Giga White'
Lobularia maritima 'Giga White'
Lobularia maritima Giga White
Sweet Alyssum, Sweet Alison
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Description
Lobularia maritima or Alyssum odorata 'Giga White', also known as Sweet Alyssum, is an annual ground cover plant, highly appreciated for its long-lasting flowering and prized for pot plantings, hanging baskets, or borders, as it tirelessly blooms for several months. Vigorous, it has a tendency to cascade from a pot placed at a height. Moreover, this flowering emits a honey fragrance, which attracts numerous pollinators. 'Giga White' is covered from June to October with delicate flowering, pure and brilliant white, in clusters of fluffy flowers.
Alyssum odorata or Lobularia maritima is an annual plant belonging to the family of Brassicaceae, like mustard and rapeseed. It is native to southern Europe and the Mediterranean region. It has many attractions, which is why it is often seen cascading from hanging baskets and adorning borders. Its simple sowing allows for the rapid growth of an annual plant with woody-based herbaceous clumps, dense and prostrate, with a compact and rounded habit, completely covered with flowers, like round and white cushions, 15cm (6in) in height and 25cm (10in) in width. Its small foliage is glaucous green, narrow, and villous. Flowering extends from June to September, completely covering the plant with white flowers with a honey fragrance.
Sweet alyssums appreciate a sunny exposure, in any well-drained soil. They can be installed throughout the garden: in rockeries, on walls, and in containers to add a touch of volume. You can sow them directly in place, broadcast, as soon as the temperatures are mild or start them under cover to then use them in all your compositions in pots or containers. Very floriferous and requiring no maintenance, they are perfect plants to cover the top of walls or spaces between stones in rockeries, at the base of perennials and shrubs in dry soil, such as rosemary, sage, lavender, or rockroses. In pots or planters, they pair well with Surfinias or Calibrachoas. They effectively cover the edges of flower beds and pots for a season and happily mix with other annuals. As an effective ground cover, it is wise to plant it with plants with a vertical habit that it covers well at the base.
Flowering
Foliage
Plant habit
Botanical data
Lobularia
maritima
Giga White
Brassicaceae
Sweet Alyssum, Sweet Alison
Cultivar or hybrid
Planting and care
The 'Giga White' Sweet Alyssum is best sown under cover in a seed tray from March onwards. If frost is still persistent in your region, wait until April. The seeds will prefer temperatures around 18°C (64.4°F). Just cover the seeds with a thin layer of compost and keep it slightly moist. The seeds will germinate in about fifteen days. When the young plants are big enough to be moved, you can separate them and place them in containers if the frost period is not over and keep them warm. Otherwise, you can plant them directly in the ground. You can also sow them directly in the garden from April, if your climate is mild, or in May if you still fear the cold. Once they have sprouted, you can thin out the plants if necessary.
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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