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Blue throatwort seeds - Trachelium
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Available in 1 sizes
Our selection of Trachelium seeds includes sought-after varieties such as Trachelium caeruleum 'Black Knight' and its white variant 'White Knight', both selected for their uniform umbels, highly valued in floristry. Among the best, we also have the 'Purple Emperor' Trachelium which captivates with its sumptuous purple flowers, and T. caeruleum 'White Cloud' which offers a touch of elegance with its delicate white flowers, perfect for creating bursts of light in the garden. Let's add to this selection Trachelium caeruleum 'Lake Michigan', known for its robustness and abundant flowering in deep blue shades.
Trachelium is a perennial plant often grown as an annual, related to bellflowers. It is loved for its dense foliage and large umbels of small colourful flowers that attract attention from spring to summer. Easy to sow in trays, it lends itself to a variety of uses, from borders to floral arrangements. In mild climates, it can be sown directly in the ground in autumn on the surface of lightened, well-drained soil. Discover them in this selection.
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The flowering period indicated on our website applies to countries and regions located in USDA zone 8 (France, the United Kingdom, Ireland, the Netherlands, etc.)
It will vary according to where you live:
- In zones 9 to 10 (Italy, Spain, Greece, etc.), flowering will occur about 2 to 4 weeks earlier.
- In zones 6 to 7 (Germany, Poland, Slovenia, and lower mountainous regions), flowering will be delayed by 2 to 3 weeks.
- In zone 5 (Central Europe, Scandinavia), blooming will be delayed by 3 to 5 weeks.
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 planting period indicated on our website applies to countries and regions located in USDA zone 8 (France, United Kingdom, Ireland, Netherlands).
It will vary according to where you live:
- In Mediterranean zones (Marseille, Madrid, Milan, etc.), autumn and winter are the best planting periods.
- In continental zones (Strasbourg, Munich, Vienna, etc.), delay planting by 2 to 3 weeks in spring and bring it forward by 2 to 4 weeks in autumn.
- In mountainous regions (the Alps, Pyrenees, Carpathians, etc.), it is best to plant in late spring (May-June) or late summer (August-September).
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.