Frances Williams hosta

Sun

Partial to full shade; gentle morning sun is suitable in cool climates. Avoid hot afternoon sun.

Water

Keep soil evenly moist but not waterlogged. Water deeply during dry spells, especially beneath trees and in containers.

Soil

Fertile, humus-rich soil that holds moisture but drains freely; tolerates slightly acidic to slightly alkaline conditions.

Height

2-3 ft (0.6-0.9 m), including flower stems

Spread

4-5 ft (1.2-1.5 m)

Flowers

Near-white to very pale lavender, bell-shaped flowers on upright stems in early to midsummer.

Foliage

Large, rounded to heart-shaped, strongly puckered blue-green leaves with broad, uneven yellow margins that lighten through the season.

Growth

Moderate; allow several years for a substantial mature clump.

Care needed

Medium

• Pollinators
• Cold hardy
• Low allergen

Northern hemisphere months. In Australia, shift them by six.

Difficulty

Moderate

Toughness

Fairly tough

Pick your zone, country, light and whether you have pets.

1. Planting day

   1 ft (0.3 m)

2. After 1 year

   1.5 ft (0.45 m)

3. After 2 years

   2 ft (0.6 m)

4. After 3 years

   2.5 ft (0.75 m)

   full size

About 3 years to full size.

From a typical nursery size, at an average rate for this kind of plant. A rule of thumb, not a forecast.

Cats and dogs

Toxic

Growth rate

Moderate

• Plant with the crown at soil level, allowing room for the mature spread.
• Water at soil level during dry weather; do not let newly planted clumps dry out.
• Apply compost or leaf mould in spring, keeping it clear of the crown.
• Use a light application of balanced fertiliser in spring if growth is weak; avoid excessive feeding.
• Shelter emerging leaves from late frost and drying winds.
• Divide only when you want more plants or the clump becomes overcrowded; established plants can remain undisturbed for years.

Pruning. Cut spent flower stems back to the base unless you want seed. Remove collapsed leaves after autumn frost or as they die back, and clear the debris from around the crown.

Early spring

Plant or divide as the pointed shoots begin to emerge, and water thoroughly.

Spring

Top-dress with compost and check emerging shoots for slug and snail damage.

Late spring

Cover tender new growth temporarily if frost is forecast.

Summer

Water during dry spells and watch for browning leaf margins in exposed positions.

After flowering

Remove spent flower stems at their base.

Late autumn

Clear dead foliage and fallen debris without damaging the dormant crown.

• Use as a bold focal clump in a shaded border, with finer-textured ferns around it.
• Repeat along a shaded path to create rhythm with large, contrasting leaves.
• Plant beneath deciduous trees where soil moisture can be maintained and root competition is manageable.
• Grow in a large, frost-resistant container in a sheltered courtyard, with regular watering.

Garden styles it suits: Woodland, Japanese, English country, Blues and silvers, Green on green and Modern courtyard.

Plant it with: Japanese painted fern, Astilbe, Siberian bugloss, Solomon's seal, Japanese forest grass and Hellebores.

Wildlife: Flowers provide nectar for bees and may attract hummingbirds in North America. Deer, slugs and snails readily feed on the foliage.

• Slugs and snails chew holes in leaves and damage emerging shoots. Check after dark, remove hiding places and use iron phosphate bait according to its label where needed.
• Yellow leaf margins turn brown after frost, drying winds or strong sun; this cultivar is especially susceptible. Choose a sheltered, shaded position and maintain even moisture; damaged tissue will not recover.
• Deer can eat leaves down to their stalks. Use effective fencing or a locally appropriate repellent, renewed as directed.
• Hosta virus X can cause irregular mottling, ink-like bleeding along veins and distorted leaves. There is no cure: remove infected plants, do not propagate them and disinfect tools between plants.

Hostas contain saponins and are toxic to cats, dogs and horses if eaten; leaves, stems, flowers and roots should all be kept out of reach. Ingestion commonly causes vomiting or diarrhoea in pets; seek veterinary advice. Hostas are not generally regarded as poisonous to people, but this ornamental plant is not recommended for eating.

• Elegans hosta (Hosta sieboldiana 'Elegans')

  Has similarly large, puckered blue-grey leaves but lacks the yellow margins.

• Great Expectations hosta (Hosta 'Great Expectations')

  Has pale yellow to creamy centres surrounded by blue-green margins, reversing the colour arrangement of Frances Williams.

• Patriot hosta (Hosta 'Patriot')

  Has greener, less heavily puckered leaves with crisp white rather than yellow margins, and generally forms a smaller clump.

The cultivar honours American hosta enthusiast Frances Williams, while Hosta commemorates Austrian botanist Nicolaus Thomas Host and sieboldiana honours plant collector Philipp Franz von Siebold.

Propagation. Divide established clumps in early spring as shoots emerge, keeping several buds and a good portion of roots on each division. Seedlings will not reliably retain the cultivar's leaf colouring or form.

Accepted botanical name

Hosta sieboldiana

Native range

Japan.

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