Veronica austriaca Knallblau
Veronica austriaca Knallblau
Veronica austriaca Knallblau
Saw-leaved Speedwell, Broadleaf Speedwell, Large Speedwell, Austrian Speedwell
Field of plants arrived in good condition despite this period of intense heat.
f, 14/08/2022
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Description
Veronica austriaca Knallblau is a variety of Austrian veronica that is particularly attractive due to its medium blue, extraordinarily vibrant flowers. Short but numerous spikes emerge in spring from a compact green-grey leafy carpet of vegetation that disappears in winter. This undemanding flowering perennial will be happy in ordinary, well-drained, even rocky and limestone soil. It likes sunny borders but does not mind semi-shaded rockeries or light woodlands. It will find a place in a cottage garden or a small informal bed.
Veronica austriaca, also known as Veronica teucrium or Germander speedwell, is a small woody perennial plant of the scrophulariaceae family. It is native to temperate areas of central and southern Europe, but also widespread in western Asia. The 'Knallblau' selection is distinguished by the particularly vibrant blue of its small flower spikes. It develops numerous initially prostrate branches which quickly straighten up to reach about 30 cm (12in) in all directions. Its stems bear small deciduous, ovate, pretty bright green leaves, with toothed edges, similar to Teucrium chamaedrys (germander shrub). From May to August, earlier or later depending on the climate, it produces small, blue flowers 1 to 2 cm (0 to 1in) in diameter in compact clusters 10 to 12 cm (4 to 5in) long at the end of the stems. The flowers start to bloom at the base of the spikes, then gradually open up to the top.
Veronica austriaca Knallblau is a lovely dwarf variety for good, well-drained, even rocky and limestone soil, in semi-shade. The soil must be moist if planted in full sun. It will be very useful and beautiful in a semi-shaded rockery with small chamomiles (Chamaemelum nobile, Anthemis tinctoria, Anthemis cretica) or as a border plant with Rhodanthemum hosmariense (in not too cold climates), Antennaria dioica Rubra, Pulsatilla or even blood-red perennial geranium. Under the cover of sparsely dense bushes, it can be planted alongside dead nettles, Waldsteinia ternata or Epimedium.
Veronica austriaca Knallblau in pictures
Flowering
Foliage
Plant habit
Botanical data
Veronica
austriaca
Knallblau
Plantaginaceae
Saw-leaved Speedwell, Broadleaf Speedwell, Large Speedwell, Austrian Speedwell
Cultivar or hybrid
Planting and care
Plant this dwarf variety in any good, well-drained, even rocky and chalky soil, in full sun or partial shade. Note that in full sun, the soil must be moist. Very useful in a partially shaded rockery or as a border plant.
Planting period
Intended location
Care
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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