Hosta

Sun

Partial shade, ideally with morning sun and afternoon shade. More sun is possible in cooler climates with consistently moist soil; deep shade reduces flowering.

Water

Keep the root zone evenly moist but not waterlogged. Water deeply during dry spells, especially in sunny positions and containers.

Soil

Humus-rich, moisture-retentive soil with good drainage. Tolerates clay improved with organic matter and a range from mildly acidic to mildly alkaline soil.

Height

1-2 ft (0.3-0.6 m) in leaf; flower stems reach 2-3 ft (0.6-0.9 m)

Spread

2-3 ft (0.6-0.9 m)

Flowers

Late summer to early autumn; large, fragrant, white trumpet-shaped flowers that open towards evening. Flowering is less dependable in cool summers or deep shade.

Foliage

Broad, glossy, bright green leaves with pointed tips, heart-shaped bases and prominent veins; dies back for winter.

Growth

Moderate; takes several years to form a substantial clump.

Care needed

Low

• Water at soil level when the root zone starts to dry; do not let container plants dry out completely.
• Apply compost around the clump in spring, keeping it clear of the emerging shoots.
• Maintain a 2 in (5 cm) organic mulch to conserve moisture, without burying the crown.
• Use a balanced slow-release fertiliser in spring if growth is weak or the soil is poor; avoid heavy feeding.
• Divide crowded clumps in early spring only when needed; established plants can remain undisturbed for years.

Pruning. Cut spent flower stems back to the base unless you want seed. Remove yellowed or collapsed leaves in late autumn or winter, rather than cutting off healthy green foliage.

Early spring

Divide or transplant before the leaves fully unfurl, and water well afterwards.

Spring

Top-dress with compost, renew mulch and protect emerging shoots from slugs and snails.

Late spring

Cover emerging foliage temporarily if a late frost is forecast.

Summer

Water deeply during dry weather and check containers frequently.

Late summer

Enjoy the evening scent; remove fading flower stems if seed is not wanted.

Late autumn

Clear collapsed foliage and check that winter drainage is adequate.

• Plant beside a shaded patio or frequently used path where the evening fragrance can be appreciated.
• Repeat clumps along a woodland-edge border, pairing the broad leaves with finely divided ferns.
• Use beneath open-canopied trees where there is enough moisture and light for flowering.
• Grow in a large container in a sheltered courtyard, allowing room for the mature clump.
• Combine with white-flowered plants in a lightly shaded evening garden.

Garden styles it suits: Woodland, Sensory garden, White garden, Moon garden, Japanese and Cottage garden.

Plant it with: Japanese painted fern, Astilbe, Brunnera, Solomon's seal, Japanese forest grass and Coral bells.

Wildlife: The flowers provide nectar for visiting insects, including moths. Deer, rabbits, slugs and snails may feed on the foliage.

• Slugs and snails chew holes in leaves, especially young growth. Inspect after dark, remove hiding places and use labelled iron-phosphate bait where necessary.
• Deer and rabbits can strip foliage. Protect plants with suitable fencing or individual barriers.
• Brown, dry leaf margins usually indicate drought, hot afternoon sun or root competition. Water deeply, mulch and move the plant to a less exposed position if needed.
• Hosta virus X can cause irregular mottling, distorted leaves and dark markings along veins. Remove and dispose of affected plants; do not divide them, and disinfect tools between plants.

Toxic to cats, dogs and horses if eaten: leaves, flowers and underground parts contain saponins that can cause vomiting, diarrhoea and abdominal discomfort. Most pet exposures cause gastrointestinal illness, but seek veterinary advice after ingestion. It is not generally considered poisonous to people; young shoots are traditionally eaten cooked in parts of Asia, but ornamental plants should not be eaten without reliable identification and knowledge of any pesticide treatments.

• Blue hosta (Hosta sieboldiana)

  Usually has thicker, puckered leaves with a blue-grey waxy coating, rather than glossy bright green leaves; flowers are generally less fragrant.

• Blue plantain lily (Hosta ventricosa)

  Has violet-purple, bell-shaped flowers rather than the large, fragrant white trumpets of Hosta plantaginea.

• Daylily (Hemerocallis spp.)

  Forms fans of long, strap-shaped leaves, not broad heart-shaped leaves; its flowers have a more open, lily-like shape.

Hosta honours Austrian botanist Nicolaus Thomas Host, while plantaginea means plantain-like, referring to the broad, prominently veined leaves.

Propagation. Divide established clumps in early spring as shoots emerge, keeping several buds and a good section of roots on each division. Seed is possible, but garden-collected seed may produce hybrids rather than plants identical to the parent.

Accepted botanical name

Hosta plantaginea

In the US and Canada

Introduced in Canada and the lower 48 states.

Native range

China South-Central, China Southeast, Inner Mongolia, Mongolia, Qinghai and Taiwan.

Sources: GBIF (CC BY 4.0), USDA PLANTS and Trefle (CC BY 4.0). The care and design notes are LandscapeGPT's own.