Lobelia x gerardii Vedrariensis - seeds
Lobelia x gerardii Vedrariensis - seeds
Lobelia x gerardii Vedrariensis
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Description
Lobelia x gerardii Vedrariensis, also known as Violet Lobelia or Purple Lobelia, is a perennial plant that is quite sensitive to cold but has great ornamental value. In the second half of summer, it produces magnificent floral spikes in shades of purple. It can be used to decorate terraces, summer flowerbeds, or the banks of a pond, as it thrives in moist environments.
Lobelia x gerardii Vedrariensis is an herbaceous plant with short rhizomes from the Campanulaceae family. It first forms basal rosettes of leaves, from which thick leafy stems emerge. The overall plant forms a beautiful clump, reaching 70-80 cm in height and 30-40 cm in width. The leaves, measuring 5 to 10 cm in length, are lanceolate to elliptical, fairly wide, and dark green, often tinged with red. The plant blooms generously in August-September. At the end of the stems, spikes measuring 15 to 45 cm in length develop, adorned with numerous two-lipped flowers that arise from the axils of bracts or leaves. Their colour is a mix of violet and purple. This flowering is nectar-rich and attracts pollinating insects. The fruit is a twin capsule containing fine seeds. The vegetation of this lobelia is deciduous, emerging from the ground in spring and drying up in autumn. Its roots can withstand short freezes of around -7 °C. In regions with colder winters, it is preferable to protect this plant from the cold to ensure its survival. It is also possible to harvest the seeds at the end of the season and sow them for the following season.
Lobelia gerardii Vedrariensis thrives in moist to wet, neutral to slightly acidic soils, occasionally even in flooded areas. It prefers sunny exposures in moist soil but can also tolerate partially shaded areas, as long as the soil remains consistently moist during summer. It looks beautiful in large flower pots with annual salvias, and is ideal for water gardens and border beds near ponds. It can be combined with phlox paniculata, its cousins Lobelia siphilitica and Lobelia cardinalis, Goat's Beard, or Astilbes, for example.
Attention, these seeds are intended for experienced gardeners who are used to sowing very fine seeds. The seeds are as fine as dust and barely visible to the naked eye. We also offer this plant already growing in pots.
Flowering
Foliage
Plant habit
Botanical data
Lobelia
x gerardii
Vedrariensis
Campanulaceae
Cultivar or hybrid
Planting and care
Sowing:
Sow indoors from January to April. It is best to sow early in the year. Sow finely on the surface of a special sowing compost kept slightly moist. Light promotes germination. Mixing the seeds with fine sand allows for a more uniform sowing of the very fine seeds. The seeds need cold to germinate: place your seed tray at 4°C for 2 weeks and then move it to a warm place at a temperature of 22-24°C. Germination takes 15 to 25 days. Transplant the seedlings when they are large enough to handle into 8 cm pots. Gradually acclimatise them to the outdoors (in light shade) and plant them in the garden or in pots once the risk of frost has passed. Leave a spacing of 45 cm between each plant.
Cultivation:
Lobelia gerardii Vedrariensis prefers moist and rich, acidic to neutral (non-limestone), clayey and/or humus-bearing soil. It thrives in non-scorching sun or partial shade. Ensure that the soil remains moist until the plant is well established. Mulch the soil in summer to save on watering. Water if necessary during hot and dry weather. If you let the plants produce seeds, you can harvest them in late summer to sow them again the following year wherever you like. Spontaneous self-seeding is not uncommon, but this plant never becomes invasive. Moreover, young plants in the wrong place are very easy to pull out. The hardiness of this lobelia is quite limited, especially in moist soil. It is advisable to protect the plants in a cold greenhouse in regions where winters can be quite harsh.
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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