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Veronica allionii - Allioni's speedwell

Veronica allionii
Allioni's speedwell

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This plant carries a 12 months recovery warranty

More information

This alpine speedwell forms a very low carpet of dark green, leathery leaves, from which short purple-violet spikes rise in summer. It is suitable for rock gardens, troughs, or low walls, in sun that is not scorching. Provide it with poor, gravelly, and very well-drained soil, moist at depth; it dislikes stagnant water and hot summers. Hardiness: -20 °C in good conditions.
Height at maturity
10 cm
Spread at maturity
25 cm
Exposure
Sun
Hardiness
Hardy down to -20.5°C
Dry resistance
Average
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Best planting time March, October
Recommended planting time February to May, September to November
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Flowering time July to August
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Description

Veronica allionii, Allioni’s speedwell, is a small alpine perennial with a compact habit, ideal for rock gardens, troughs and dry stone walls. Its dark green foliage forms a low cushion, almost flattened against the stone. In summer, short spikes rise above the leaves bearing numerous violet-blue flowers. This alpine plant will thrive in the sun, in a rock garden that is not too dry.

This species belongs to the Plantaginaceae family, that of the speedwells, plantains and foxgloves. Its main botanical synonym is Veronica pyrenaica. In the wild, Veronica allionii grows in the south-western Alps, in France and Italy. It occupies dry, rocky grasslands of the subalpine and alpine zones, often on siliceous or acidic soils, among boulders, gravel and on poor slopes. It is a herbaceous perennial with a slightly woody base. The plant forms prostrate, leafy stems that can root when they touch the ground, then erect flowering shoots. Its growth is slow. The foliage grows less than 10cm tall, and the flowering spikes are 10–15cm. Its spread reaches 20–30cm after a few years. The leaves are opposite, ovate to elliptical, leathery, dark green, entire or very finely toothed. The deciduous foliage disappears in winter. The flowers are gathered in rounded terminal spikes. Each flower bears a small, dark blue to violet-blue corolla with two visible stamens and a fine style in the centre. Flowering occurs in July and August in a mountain climate; it may start earlier in cultivation, when spring is mild and the soil warms up quickly.
The species name honours Carlo Allioni, an 18th-century botanist from Piedmont. In some Alpine valleys, the plant has been given the names of Alpine tea or chamois herbal tea, as it is locally used as an infusion.

Plant it in a rock garden that receives morning sun, a stone trough, or a crevice in a dry stone wall that does not dry out completely deep down. It pairs well with other small mountain plants such as Campanula cochleariifolia ‘Alba’, Armeria juniperifolia ‘Bevan’s Variety’, and Antennaria dioica ‘Rubra’, for example.

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Perennial veronica: planting and care
Family sheet
by Eva 11 min.
Perennial veronica: planting and care
Read article

Flowering

Flower colour blue
Flowering time July to August
Inflorescence Cluster

Foliage

Foliage persistence Deciduous
Foliage colour dark green

Plant habit

Height at maturity 10 cm
Spread at maturity 25 cm
Growth rate slow

Botanical data

Genus

Veronica

Species

allionii

Family

Plantaginaceae

Other common names

Allioni's speedwell

Botanical synonyms

Veronica pyrenaica

Origin

Alps

Product reference • 26129

Planting and care

Plant Veronica allionii in spring in cold or damp regions, and in early autumn in alpine gardens or naturally well-drained soils. Choose a sunny but airy position, preferably morning sun or bright, non-scorching light in hot climates. Provide it with poor, gravelly, sandy or stony soil, very well-drained, neutral to acid, that remains slightly moist at depth. Plant it in a rock garden, an alpine trough, or a pocket of substrate lightened with plenty of gravel. Water regularly for the first season, then only during prolonged droughts. Avoid adding fertiliser and compost. Protect the plant from stagnant winter moisture and from scorching situations.

Planting period

Best planting time March, October
Recommended planting time February to May, September to November

Intended location

Suitable for Rockery
Type of use Edge of border, Slope
Hardiness Hardy down to -20.5°C (USDA zone 6b) Show map
Ease of cultivation Amateur
Planting density 6 per m2
Exposure Sun
Soil pH Acidic, Neutral
Soil type Stony (poor and well-drained)
Soil moisture Moist soil, very well-draining
Dry resistance Average

Care

Pruning instructions Remove faded spikes if you wish to keep a neat cushion. Clean the dry stems at the end of winter, without touching the stump.
Pruning Pruning recommended once a year
Pruning time March
Disease resistance Good
Overwinter Can be left in the ground

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