Gentiana asclepiadea (willow gentian) — perennial herbaceous

Overview

Gentiana asclepiadea is a perennial herbaceous in the genus Gentiana, part of the Gentianaceae family. Gentiana asclepiadea grows best in partial shade and full sun, and tolerates well-drained and humus-rich soils and acidic to neutral pH. Its UK hardiness is rated H5. Suggested uses include rock gardens, woodland gardens and borders. It is native to Europe to Iran.

About the genus

Gentiana is a genus of flowering plants belonging to the gentian family (Gentianaceae), the tribe Gentianeae, and the monophyletic subtribe Gentianinae. With over 300 species, it is considered a large genus. Gentians are notable for their mostly large trumpet-shaped flowers, which are often of an intense blue hue, though some are also bright yellow.

Wikipedia contributors, "Gentiana", CC BY-SA 4.0 — Gentiana

In the garden

Gentiana asclepiadea is a perennial herbaceous gentian native from Europe to Iran. In cultivation it is valued for its season of summer bloom, which in the UK extends from June to September. Plants are typically placed where the soil remains moist and enriched with organic matter; a well-drained, humus-rich medium on the acidic to neutral side of the pH scale suits them best. Light requirements include both partial shade and full sun, so choose a spot that matches your garden conditions — sites under light-canopied trees or on an east-facing border are appropriate because northerly, easterly and westerly aspects are all acceptable. Exposure should be sheltered to semi-exposed rather than fully exposed. Hardiness is rated H5 (hardy), meaning it withstands normal UK winter conditions without special protection when planted in suitable soil. Use willow gentian in rock and woodland gardens or in mixed borders where soil moisture can be maintained and roots are not allowed to dry out. Its habit and flowering season make it especially useful for adding sustained interest from early summer through into early autumn, filling the gap between high summer and the first autumn perennials.

Growing conditions

Best soil and position for Gentiana

Sunlight: partial shade, full sun
Soil type: well-drained, humus-rich
Soil pH: acidic to neutral
Soil moisture: moist
Aspect: north, east, west
Exposure: sheltered to semi-exposed
UK hardiness: H5

Plant details

Gentiana asclepiadea size, habit and characteristics

Plant type: perennial herbaceous
Suggested uses: rock gardens, woodland gardens, borders
Native to: Europe to Iran

Care notes

Pruning and caring for Gentiana asclepiadea

Cultivation: Prefers cool, moist conditions; avoid waterlogging; mulch in winter
Pruning: Remove faded flowers to encourage further blooming
Propagation: seed, division

Frequently asked questions

How do I grow Gentiana asclepiadea?

Prefers cool, moist conditions; avoid waterlogging; mulch in winter.

Where is the best place to plant Gentiana asclepiadea?

Gentiana asclepiadea prefers partial shade and full sun. It suits sheltered to semi-exposed positions.

What soil does Gentiana asclepiadea need?

Gentiana asclepiadea grows best in well-drained and humus-rich soil. It prefers acidic to neutral soil. Aim for soil that stays moist.

How do I prune Gentiana asclepiadea?

Remove faded flowers to encourage further blooming.

Is Gentiana asclepiadea hardy in the UK?

Gentiana asclepiadea has an RHS hardiness rating of H5, meaning it is hardy in most of the UK, tolerating -15 to -10°C.