Honeywort Purpurascens Kiwi Blue Seeds - Cerinthe major
Honeywort Purpurascens Kiwi Blue Seeds - Cerinthe major
Cerinthe major Purpurescens Kiwi Blue
Honeywort
A marvel! All the plants sown in autumn 2025 grew and flowered for months in this magnificent blue-lilac colour.
Gabryel, 31/05/2026
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Description
Cerinthe major Purpurascens Kiwi Blue, also called Honeywort, is an annual or biennial of great ornamental value that is still rarely found in our gardens. It bears flowers encased in bracts that are tinged with a uniquely magnetic purplish-blue. Its golden flowers are embellished at the base with a red or purplish line and gracefully nod. It evokes succulent plants, with its thick heart-shaped, bluish-green leaves, spotted with white in the centre. It can be used to quickly fill the gaps between perennials, to cover the ground of dry slopes or to decorate a rock garden. They are extremely easy to sow in light, well-drained soil, in full sun.
Cerinthe major Purpurascens belongs to the family Boraginaceae, although it does not, at first sight, look at all like its cousin the borage. It is an annual or biennial plant, native to Mediterranean Europe and North Africa, that develops a taproot that allows it to grow in stony or sandy fields in poor, dry soil. In France, it is found in Provence, Languedoc, Ardèche and Corsica. This plant grows quickly and can even complete two growth cycles in one year. It forms a slightly succulent clump of foliage, made up of stems branching out from the ground that are covered with smooth, sheathed leaves of a satiny, bluish-green colour that are more or less punctuated with white spots. Flowering takes place from April to August, depending on the date of sowing. The stems are curled at their tips and unfurl, bearing 3 cm long, purplish-red tubular flowers. But its is the metallic, deep blue bracts of these flowers which glint in the light, that make this plant especially unique. The blooms are melliferous and are followed by the formation of 2 large black seeds per flower, which are easy to sow.
Cerinthe is the perfect plant to quickly cover the ground of barren slopes or the open spaces in a rock garden. It is imperative that the soil is well drained. Use it to easily create beautiful container displays, in a deep pot, together with the ornamental carrot Dara and Echium plantagenum. Its bluish hue combines wonderfully with that of zinc containers. Also install it in dry perennial beds, with grasses for example or plants with grey foliage (sagebrushes, false dittany, silverbush or Convolvulus althaeoides..).
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Flowering
Foliage
Plant habit
Botanical data
Cerinthe
major
Purpurescens Kiwi Blue
Boraginaceae
Honeywort
Mediterranean
Planting and care
Sowing Cerinth major purpurascens is almost impossible to fail. Once the plant has finished flowering, let the plant produce seeds that are large and black once mature. You can sow two different ways: 1- Collect the ripe seeds and sow them at a more favourable time, in September-October for plants that flower in April-May, or in April-May for summer flowering, or sow in July to obtain blooms in the autumn. 2- Allow spontaneous self-seeding : your new plants will bloom from the end of April and May (autumn sowing), then in July (May sowing) and finally in October (summer sowing). Direct sowing in the open ground gives good results and very strong plants since it allows their taproot to plunge deeply and quickly into the soil, producing more drought-resistant, well-branched plants. It is best to always collect seeds so that you have a reserve in case the plants are destroyed by a particularly harsh winter. To help the seeds germinate in containers, leave the seeds to soak for 2 or 3 days in a glass of water. When they are visibly swollen, push them into a pot containing garden soil mixed with a little coarse sand or fine gravel. The soil should remain very moist and the pot should be kept under cover until the first shoots have emerged from the seed's casing. Germination is quick: the seedlings will easily reach 5 cm high. When the first 2 leaves appear, you can usually see the roots come out of the base of the pot, and you then know it is time to prick out the seedlings into larger, individual pots. Once they have 4 leaves, the terminal bud can be pinched in order to force the plant to branch out and produce more flower stems. It is useful to gradually harden off the seedlings by placing them outdoors in the shade for a few hours each day, when the weather is not too cold. They should be acclimatized to full sun very gradually, before they are planted out into the garden in their final position
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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