Perennial · Asparagaceae family
Siebold's hosta
Hosta sieboldiana
In short a 10-second read
Siebold's hosta (perennial) grows to 0.4–1 m tall and 0.6–1.5 m wide when mature. It grows best in part shade to shade, in average to moist soil. It flowers in June–July; the flowers are white or purple. Hardy to −32 °C.
× spread 0.6–1.5 m
Where to plant
Sun, soil, frost.
It grows best in part shade to shade, in average to moist soil. Hardy to −32 °C.
Sun
Tolerates several positions — choose to suit the rest of the garden.
Soil and water
average to moist · watering: moderate
Soil: humus-rich, loamy
Frost
It copes with a normal winter outdoors.
How much space it takes
Mature size.
The mature plant next to a person (175 cm).
Next to a person
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
What to do and when.
Months for Central Europe. The line shows the current month.
The year at a glance
Flowers
June–July · white or purple
Pruning
No pruning needed — just remove dead or damaged parts (October–November).
Planting
container plant: March–May, September–November
Winter protection
shelter from wind
Overwintering
In winter it needs protection.
Before the first frosts: shelter from wind.
- Shelter from wind
- Hardy to −32 °C
- Dies back in winter and regrows in spring
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
0.9–1.8 m
largeleaf brunnera
0.3–0.45 m
barrenwort
0.15–0.3 mReady-made Studio combinations that include Siebold's hosta
Hostas, fern and sedges with wild ginger — calm green planting for a…
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.
Does Siebold's hosta survive winter outdoors?
Yes, with protection: shelter from wind.
Where the data comes from
We compared the data in 13 expert sources. Last checked 14 October 2026.
Show sources (13)
- NC State Extension Gardener Plant Toolbox
- RHS Plant Finder
- Plants For A Future
- BfN — Gefäßpflanzen
- Neobiota Austria — Neophyten der Unionsliste
- Iowa State Extension - How to Plant Perennials
- RHS - How to grow perennial plants
- Perennials.com
- Perennials.com
- Perennials.com
- Perennials.com
- Perennials.com
- Invasive plant lists — this species is not on them: Slovakia
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