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Perennial · Asparagaceae family

Siebold's hosta

Hosta sieboldiana

Part shade to shade 0.4–1 m × 0.6–1.5 m Flowers June–July to −32 °C
Flower colours Click a colour

In short a 10-second read

LightPart shade to shade
Size0.4–1 m
spacing 90 cm
FlowersJune–July
PlantingApril–May, September–October
WinterShelter from wind

Where to plant and how much to water

Light, soil and water.

It grows best in part shade to shade, in average to moist soil.

Sun

Sun6 hours or more
Part shade3–6 hours
Shadeunder 3 h

Soil

acidic to neutral soil
acidicneutralalkaline
average to moisthumus-richloamy

Watering

keep the soil evenly moistless when it rains

Frost

−32 °C
shelter from winddies back in winter, regrows in spring

How much space it takes

Mature size.

The mature plant next to a person (175 cm).

50 cm1 m1.5 m0.4–1 mspread 0.6–1.5 m
0.4–1 m× spread 0.6–1.5 m

Plant 90 cm apart.

Reaches maturity in about 2–5 years. The final size depends on the cultivar and the spot — we give the range from smallest to largest.

Calendar

Through the year.

Months for Central Europe. The line shows the current month.

The year at a glance

Flowers: JanuaryFlowers: FebruaryFlowers: MarchFlowers: AprilFlowers: MayFlowers: JuneFlowers: JulyFlowers: AugustFlowers: SeptemberFlowers: OctoberFlowers: NovemberFlowers: DecemberPlanting: JanuaryPlanting: FebruaryPlanting: MarchPlanting: AprilPlanting: MayPlanting: JunePlanting: JulyPlanting: AugustPlanting: SeptemberPlanting: OctoberPlanting: NovemberPlanting: DecemberFeeding: JanuaryFeeding: FebruaryFeeding: MarchFeeding: AprilFeeding: MayFeeding: JuneFeeding: JulyFeeding: AugustFeeding: SeptemberFeeding: OctoberFeeding: NovemberFeeding: DecemberProtection: JanuaryProtection: FebruaryProtection: MarchProtection: AprilProtection: MayProtection: JuneProtection: JulyProtection: AugustProtection: SeptemberProtection: OctoberProtection: NovemberProtection: DecemberJanFebMarAprMayJunJulAugSepOctNovDec
FlowersPlantingFeedingProtection
Now, in October: a good time for planting (container plant). · watch for vine weevil.
JanFebMarAprMayJunJulAugSepOctNovDec

Flowers

JanFebMarAprMayJunJulAugSepOctNovDec

June–July · white or purple

Planting

JanFebMarAprMayJunJulAugSepOctNovDec

container plant: April–May, September–October

Feeding

JanFebMarAprMayJunJulAugSepOctNovDec

March–May

Protection

JanFebMarAprMayJunJulAugSepOctNovDec

August–September (protection): Water in nematodes against vine weevil larvae (August to early September).

What to plant now (October) full list in October (244) →

Feeding

Nutrition.

Light
balanced fertilisercompost or mulch
JanFebMarAprMayJunJulAugSepOctNovDec

Pests and diseases

Common problems and what to do.

The most common problems in Central Europe. Protection is listed from the gentlest option.

High riskMedium riskLow riskRisk for this plant according to the source · no label = no documented level

What you will see

Holes in leaves and shiny trails, especially on young shoots in spring.

The source says: slugs find it particularly tasty and eat it severely.

How to protect

  1. Prevention
    • Water in the morning so the plant dries off by evening.
    • Watch and protect young shoots in spring.
    • Encourage natural enemies (birds, toads, hedgehogs).
  2. By hand damp, mild evenings from spring to autumnCollect slugs and snails in the evening by torchlight; traps made of half an orange or containers of beer.
  3. Biological warm, moist soil, spring to early autumnPhasmarhabditis hermaphrodita nematodes watered into the soil (effective against slugs, less so against snails).
Slugs and snailspestHigh risk

What you will see

Holes in leaves and shiny trails, especially on young shoots in spring.

The source says: slugs find it particularly tasty and eat it severely.

How to protect

  1. Prevention
    • Water in the morning so the plant dries off by evening.
    • Watch and protect young shoots in spring.
    • Encourage natural enemies (birds, toads, hedgehogs).
  2. By hand damp, mild evenings from spring to autumnCollect slugs and snails in the evening by torchlight; traps made of half an orange or containers of beer.
  3. Biological warm, moist soil, spring to early autumnPhasmarhabditis hermaphrodita nematodes watered into the soil (effective against slugs, less so against snails).
More about this problem
Vine weevil

Vine weevil

Otiorhynchus sulcatus
Medium riskpest
More about this problem

What you will see

Adult beetles notch leaf edges; larvae eat the roots and the plant wilts.

The source says: it is among the perennials prone to damage.

When to look

JanFebMarAprMayJunJulAugSepOctNovDec
September–March

How to protect

  1. Prevention
    • When planting and repotting, check the roots and remove larvae.
    • Encourage birds, toads, hedgehogs and ground beetles.
  2. By hand May to SeptemberEvening collection of adult beetles by torchlight; pick larvae out of the roots and soil.
  3. Biological August to early September, soil warm enoughNematodes (Steinernema, Heterorhabditis) watered into the soil against the larvae.
Vine weevilpest · September–MarchMedium risk

What you will see

Adult beetles notch leaf edges; larvae eat the roots and the plant wilts.

The source says: it is among the perennials prone to damage.

When to look

JanFebMarAprMayJunJulAugSepOctNovDec
September–March

How to protect

  1. Prevention
    • When planting and repotting, check the roots and remove larvae.
    • Encourage birds, toads, hedgehogs and ground beetles.
  2. By hand May to SeptemberEvening collection of adult beetles by torchlight; pick larvae out of the roots and soil.
  3. Biological August to early September, soil warm enoughNematodes (Steinernema, Heterorhabditis) watered into the soil against the larvae.
More about this problem

What you will see

Mottled or distorted leaves.

The source says: all hosta varieties are susceptible.

How to protect

  1. Prevention
    • Clean tools, healthy plants.
  2. By hand once noticedDig up and destroy affected plants; viruses cannot be treated.
Plant virusesdiseaseMedium risk

What you will see

Mottled or distorted leaves.

The source says: all hosta varieties are susceptible.

How to protect

  1. Prevention
    • Clean tools, healthy plants.
  2. By hand once noticedDig up and destroy affected plants; viruses cannot be treated.
More about this problem
Sources (6)

What to combine it with

Same needs, different flowering.

They share the same sun and soil and flower in other months — so the bed flowers for longer.

Oregon grape

Oregon grape

0.9–1.8 m
✓flowers March–April
✓taller — for the back
common lungwort

common lungwort

0.15–0.3 m
✓flowers April–May
✓lower — for the front
largeleaf brunnera

largeleaf brunnera

0.3–0.45 m
✓flowers April–May
✓lower — for the front

Ready-made Studio combinations with this plant

Click a combination — the Studio opens a new raised bed with it already planted.

Woodland shade — Siebold's hostaWoodland shade — male fernWoodland shade — Japanese sedgeWoodland shade — European wild gingerWoodland shade — common lungwort
Woodland shadeHostas, fern and sedges with wild ginger — calm green planting for a spot without sun.Open in the Studio

Frequently asked

Quick answers.

When does Siebold's hosta flower?

In June–July; the flowers are white or purple.

Does Siebold's hosta tolerate shade?

Yes, it tolerates full shade.

How much space does Siebold's hosta need?

At maturity 0.6–1.5 m wide and 0.4–1 m tall; recommended spacing 90 cm.

Slugs and snails — what can you do?

Water in the morning so the plant dries off by evening. Collect slugs and snails in the evening by torchlight; traps made of half an orange or containers of beer.

Vine weevil — what can you do?

When planting and repotting, check the roots and remove larvae. Evening collection of adult beetles by torchlight; pick larvae out of the roots and soil.

Sources (14) Checked 24 October 2026

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