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Lobelia x gerardii Vedrariensis - seeds

Lobelia x gerardii Vedrariensis

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More information

A not very hardy (-7°C), upright perennial plant forming basal rosettes and leafy stems with dark green leaves often tinged with red. In August-September, the stems are adorned with long spikes filled with violet to purple flowers. It is a lobelia that prefers moist to wet, non-calcareous soil. It will thrive in partial shade or full sun, near a pond, but also in a seasonal flower bed where the soil does not dry out too much. Sow from January to April, under a heated shelter, for planting in May.
Flower size
2 cm
Height at maturity
70 cm
Exposure
Sun, Partial shade
Annual / Perennial
Perennial
Germination time (days)
20 days
Sowing method
Sowing under cover, Sowing under cover with heat
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Sowing period January to April
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Flowering time August to September
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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

Flower colour purple
Flowering time August to September
Inflorescence Cluster
Flower size 2 cm
Bee-friendly Attracts pollinators
Product reference 21502

Foliage

Foliage persistence Deciduous
Foliage colour dark green
Product reference 21502

Plant habit

Height at maturity 70 cm
Spread at maturity 40 cm
Growth rate fast
Product reference 21502

Botanical data

Genus

Lobelia

Species

x gerardii

Cultivar

Vedrariensis

Family

Campanulaceae

Origin

Cultivar or hybrid

Product reference 21502

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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

Sowing period January to April
Sowing method Sowing under cover, Sowing under cover with heat
Germination time (days) 20 days
Product reference 21502

Intended location

Suitable for Meadow, Woodland edge, Pond edge
Type of use Border, Edge of border, Container
Hardiness Hardy down to -6°C (USDA zone 9a) Show map
Ease of cultivation Amateur
Exposure Sun, Partial shade
Soil pH Acidic, Neutral
Soil moisture Moist soil, Damp soil, Fertile, humus-bearing
Product reference 21502

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