Hosta glauca (Plantain Lily) — Clump-forming, mounded

Overview

Hosta glauca is a clump-forming, mounded perennial in the genus Hosta, part of the Asparagaceae family, with deciduous; broad, ribbed or puckered, often variegated or glaucous foliage. Hosta glauca grows best in partial to full shade; blue-leaved kinds hold their colour best out of sun, and tolerates fertile loam enriched with organic matter soils and neutral to slightly acid pH. Its UK hardiness is rated H7. It is native to Japan.

About

Hosta glauca is a clump-forming perennial in the Asparagaceae grown primarily for its broad, ribbed leaves that are often variegated or glaucous. It forms a mounded habit and dies back in winter as a deciduous plant. Best planted in partial to full shade on fertile loam enriched with organic matter where soil stays reliably moist but not waterlogged. Flowers appear in June to August.

Wikipedia contributors, CC BY-SA 4.0 — Hosta sieboldiana

About the genus

Hosta is a genus of plants commonly known as hostas, plantain lilies and occasionally by the Japanese name gibōshi. Hostas are widely cultivated as shade-tolerant foliage plants. The genus is placed in the family Asparagaceae, subfamily Agavoideae, and is native to northeast Asia.

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

In the garden

Hosta glauca is a mounded, clump-forming perennial native to Japan and a member of the Asparagaceae. It is cultivated for its broad, ribbed or puckered leaves, which are often variegated or carry a glaucous (blue-green) bloom; blue-leaved forms keep their tone best when grown out of direct sun. The plants are deciduous and produce their summer flowers from June to August. Give Hosta glauca a sheltered, north- or east-facing position in partial to full shade. It performs best in fertile loam enriched with plenty of organic matter, held reliably moist but never waterlogged; aim for neutral to slightly acidic soil pH. In UK terms the species is fully hardy (H7) and will withstand typical winter conditions across the country; the USDA range is 3–9 if you also reference stateside guidance. Use this hosta toward the centre or front of a shade border, beneath trees where roots do not completely outcompete it, or lining a shaded path. Plant in groups to show leaf texture and variegation, and avoid exposed, sun-baked sites if you want to preserve the cool leaf tone of blue forms. Flowers from June to August give a seasonal accent before the foliage dies back for winter.

Growing conditions

Best soil and position for Hosta

Sunlight: Partial to full shade; blue-leaved kinds hold their colour best out of sun
Soil type: Fertile loam enriched with organic matter
Soil pH: Neutral to slightly acid
Soil moisture: Reliably moist but never waterlogged
Aspect: North or east facing
Exposure: Sheltered
UK hardiness: H7

Plant details

Hosta glauca size, habit and characteristics

Plant type: Perennial
Habit: Clump-forming, mounded
Foliage: Deciduous; broad, ribbed or puckered, often variegated or glaucous
Native to: Japan

Care notes

Pruning and caring for Hosta glauca

Cultivation: Give a cool root run, generous leaf mould and consistent moisture — drought is what produces thin, scorched leaves. Growing in containers makes slug control far easier, and a top-dressing of grit or a copper band around the pot helps further.
Pruning: No pruning needed. Remove flower scapes once faded if seed is not wanted, and clear collapsed foliage in late autumn to take away slug shelter.
Propagation: Divide crowns in early spring as the shoots emerge, cutting between the buds with a sharp knife. Division is the only way to keep a named cultivar true.
Pest resistance: Highly attractive to slugs and snails, which is the one real limiting factor; vine weevil can be serious in containers.
Disease resistance: Generally healthy. Hosta virus X is the notable exception — affected plants should be destroyed rather than divided.

Frequently asked questions

How do I grow Hosta glauca?

Give a cool root run, generous leaf mould and consistent moisture — drought is what produces thin, scorched leaves. Growing in containers makes slug control far easier, and a top-dressing of grit or a copper band around the pot helps further.

Where is the best place to plant Hosta glauca?

Hosta glauca prefers partial to full shade; blue-leaved kinds hold their colour best out of sun. It suits sheltered positions.

What soil does Hosta glauca need?

Hosta glauca grows best in fertile loam enriched with organic matter soil. It prefers neutral to slightly acid soil. Aim for soil that stays reliably moist but never waterlogged.

How do I prune Hosta glauca?

No pruning needed. Remove flower scapes once faded if seed is not wanted, and clear collapsed foliage in late autumn to take away slug shelter.

Is Hosta glauca hardy in the UK?

Hosta glauca has an RHS hardiness rating of H7, meaning it is fully hardy throughout the UK, tolerating temperatures below -20°C.

How do I propagate Hosta glauca?

Divide crowns in early spring as the shoots emerge, cutting between the buds with a sharp knife. Division is the only way to keep a named cultivar true.

More in the Hosta genus

Browse all Hosta →