Verbena Purple Top - Vervain Seeds
Verbena Purple Top - Vervain Seeds
Verbena Purple Top - Vervain Seeds
Verbena Purple Top - Vervain Seeds
Verbena bonariensis Purple Top
Purple Top, Argentinean Vervain, Pretty Verbena, Clustertop Vervain
Nothing germinated despite following the recommendations...
Edwige , 21/02/2026
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Description
Verbena bonariensis, also called purple top vervain, is a very airy perennial, much sought after by butterflies. From summer to the first frosts, a modestly-sized basal clump of leaves produces tall stems bearing panicles of airy, fragrant, small, purplish mauve flowers. Let it grow freely in flowerbeds. In autumn, it will easily self-seed among perennials and in the naturalistic areas of the garden, bringing a lot of freshness and airiness. This easy-to-grow plant is also very drought-resistant. It thrives in deep, light soils in the sun.
Purple top vervain originates in South America, from Argentina to Brazil. Often grown as an annual, it is actually a tall, hardy perennial with deeply toothed leaves, grouped in a cushion-like basal rosette that grows to at least 50 cm in width. Its rapid growth allows it to flower in the first year of sowing. In early summer, it produces tall, square, fairly narrow, sparsely leaved stems that bear inflorescences in the form of light panicles at a height of more than 1 m. The tiny flowers display two shades of colour: lavender and purple-pink, and are either borne by terminal or axillary branches. They don't cease to bloom until the first frosts arrive, slowing only in periods of intense drought. It is a nectar-rich and melliferous plant, attracting a large number of butterflies which further accentuate its charm. The plant produces many seeds that are as fine as dust, which ensure the renewal of older plants or plants destroyed by hard frost.
Airy, elegant, delicately scented and permanently crowned by a halo of butterflies in flight, purple top verbena is an ideal plant for cottage beds and dry gardens. It goes well with Ammi, ornamental carrots, shrubby sages and lavender, wherever water is likely to run out. This plant is a boon for more barren soils, as it contents itself with very little and still is just as generous. It is ideal for providing an airy touch to a bed of coarser plants such as the big flowers of dahlias. You can also grow it in a large pot to take full advantage of its long flowering period.
Flowering
Foliage
Plant habit
Botanical data
Verbena
bonariensis
Purple Top
Verbenaceae
Purple Top, Argentinean Vervain, Pretty Verbena, Clustertop Vervain
South America
Planting and care
Sowing under cover : in February-March. Sow purple top vervain seeds in trays, pots, etc. in a special seed starting mix. Place the seedlings in a propagator, a mini-greenhouse or a heated room kept at an optimum temperature of 15-18 °C. Sow in a well-drained growing medium, taking care to barely cover the seeds. Germination is very slow and irregular. The soil should be kept cool and moist but not saturated with water at all times. Prick out young plants when they are large enough to be handled in 8 cm pots. It is important to acclimatize young plants to outdoor conditions before planting them out in full sun in well-drained soil, spacing them 60 cm apart. Cultivation: purple top vervain likes supple, deep, well-drained soil, even if calcareous, and sunny positions. The plant has a short lifespan, but its small, very fine seeds easily germinate in the garden. This plant is drought tolerant.
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).
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.
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