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Agastache Serpentine

Agastache Serpentine
Anise Hyssop, Giant Hyssop

4,8/5
14 reviews
2 reviews
1 reviews
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0 reviews

Plant still dormant. Root system underdeveloped....We must wait.

Magali82, 17/02/2024

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This plant carries a 12 months recovery warranty

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Value-for-money
A tall, bushy hybrid agastache, very floriferous, standing throughout the summer, reaching over 1.50 m (5ft). The foliage releases a scent of anise when crushed. This recent variety is a spectacular and endearing perennial plant, to be grown in the sun, in a well-drained but moist soil.
Flower size
15 cm
Height at maturity
1.50 m
Spread at maturity
90 cm
Exposure
Sun
Hardiness
Hardy down to -12°C
Soil moisture
Moist soil
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Best planting time March to April
Recommended planting time March to June, September to October
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Flowering time July to September
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Description

The 'Agastache 'Serpentine' is a recent variety that is truly imposing, distinguished by its tall stature and floribundity. Both a honey plant, aromatic and ornamental perennial, it has a very upright, dense and bushy habit and a very bushy silhouette. This variety produces tall, slightly twisted spikes throughout the summer, with tightly packed small flowers in bright lavender blue. A fragrant, spectacular, unusual and endearing plant, which is sure to arouse the curiosity of the gardener who grows it, as well as that of their neighbours!

The Agastache 'Serpentine' is a very recent Dutch horticultural hybrid belonging to the mint family. This herbaceous perennial, relatively hardy in well-drained soil, forms a large upright clump, 1.2 to 1.5 metres (4 to 5 feet) tall (sometimes 1.8 metres (6 feet) under optimal conditions) and 90 cm (35in) wide. It forms a large bushy shrub and produces elongated, triangular-shaped leaves, 8 cm (3in) long, with toothed edges, dark green, which grow along the length of the angular flowering stems. When crushed, they give off a pleasant anise fragrance. The flowering period extends from June to September, without interruption, in the form of upright and twisted inflorescences, in thin and dense spikes. Each small lavender-blue tubular flower is surrounded by violet bracts. This particularly nectar-rich flowering attracts a large number of bees and butterflies.

The Agastache 'Serpentine' is grown in sheltered and sunny borders with a slightly wild look, but also in pots on the terrace. In hot regions, it should never be without water during flowering. In cooler regions, the soil should be particularly healthy and well-drained. It is a trouble-free perennial where it is happy, providing height and consistency to borders composed of grasses (stipas, eragrostis, pennisetums), herbaceous salvias, large daisies, viper's bugloss (Echium vulgare), phacelia, sainfoin, goldenrod, and asters. It also pairs very well with shrub cinquefoils in yellow or orange, for example. In the vegetable garden, it can be planted alongside thyme, savory, chervil, or basil. Dried flowers can be well-preserved in bouquets. The leaves are traditionally used in cooking as a substitute for anise, or in herbal teas after drying.

The highly fragrant flowers and leaves of Agastache are edible and delicious in salads or fish dishes.

Agastache Serpentine in pictures

Agastache Serpentine (Flowering) Flowering
Agastache Serpentine (Foliage) Foliage

Flowering

Flower colour blue
Flowering time July to September
Inflorescence Spike
Flower size 15 cm
Fragrance slightly scented
Bee-friendly Attracts pollinators
Good for cut flowers Cut flower blooms
Flowering description Edible.

Foliage

Foliage persistence Deciduous
Foliage colour dark green
Aromatic? Fragrant foliage when creased
Foliage description Anise fragrance.

Plant habit

Height at maturity 1.50 m
Spread at maturity 90 cm
Growth rate fast

Botanical data

Genus

Agastache

Cultivar

Serpentine

Family

Lamiaceae

Other common names

Anise Hyssop, Giant Hyssop

Origin

Cultivar or hybrid

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Planting and care

'Serpentine' Agastache is a plant that enjoys warmth and dreads waterlogged soils in winter. In heavy soil, dig a hole 30 cm (12in) in all directions, pour pure sand into it, and install the stump without adding any soil. This plant requires a sunny position sheltered from heavy frosts. During severe winters, cover the stumps with straw or dead leaves to form a thick mulch. The soil should be fertile, loose, well-drained, but rather moist to support flowering. The plant can tolerate periods of temporary drought, which nevertheless harm flowering.

Planting period

Best planting time March to April
Recommended planting time March to June, September to October

Intended location

Suitable for Meadow
Type of use Border, Back of border
Hardiness Hardy down to -12°C (USDA zone 8a) Show map
Ease of cultivation Amateur
Planting density 1 per m2
Exposure Sun
Soil pH Neutral, Calcareous
Soil type Chalky (poor, alkaline and well-drained), Silty-loamy (rich and light), Stony (poor and well-drained)
Soil moisture Moist soil, Well-drained, fertile.

Care

Pruning instructions In spring, cut the faded inflorescences and clean the clump.
Pruning Pruning recommended once a year
Pruning time March to April
Disease resistance Very good
Overwinter Can be left in the ground
4,8/5
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