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

Overview

Hosta rupifraga 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 rupifraga 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 rupifraga is a clump-forming, mounded perennial with broad, ribbed or puckered leaves that are often variegated or glaucous. The foliage is deciduous; blue-leaved forms keep their tone best away from direct sun. Flowering occurs from June to August. Native to Japan, it is fully hardy in the UK (H7) and suits north- or east-facing, sheltered sites.

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 rupifraga is a shade-tolerant perennial in the Asparagaceae, native to Japan and grown for its foliage habit rather than floral display. Plants form neat mounds of broad, ribbed or puckered leaves that may be variegated or have a glaucous (blue‑green) cast. Flowering takes place from June to August. Select a north- or east-facing spot with shelter from strong winds and direct afternoon sun; blue-leaved kinds hold their colour best out of sun. Establish in fertile loam enriched with plenty of organic matter, kept reliably moist but never waterlogged, with a soil pH from neutral to slightly acid. The species is fully hardy in the UK (H7) and is also listed for USDA zones 3–9, so it tolerates typical winter conditions without special winter protection. Use Hosta rupifraga where shade and moisture are consistent: shaded borders, woodland margins or the sheltered base of trees and large shrubs. Mulch each spring to conserve moisture and add slow-release organic nutrients. If choosing a blue-leaved form, site it well out of direct sun to preserve the leaf tone.

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 rupifraga 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 rupifraga

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 rupifraga?

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 rupifraga?

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

What soil does Hosta rupifraga need?

Hosta rupifraga 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 rupifraga?

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 rupifraga hardy in the UK?

Hosta rupifraga 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 rupifraga?

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 →