Content Detail

  • Family (English) Agave
  • Family (botanic) Agavaceae
  • Tree or plant type Perennial
  • Native locale Non-native
  • Size range Medium plant (12-24 inches)
  • Light exposure Partial sun / shade (4-6 hrs light daily), Full shade (4 hrs or less of light daily)
  • Hardiness zones Zone 3, Zone 4, Zone 5 (Northern Illinois), Zone 6 (City of Chicago), Zone 7, Zone 8
  • Soil preference Moist, well-drained soil
  • Tolerances Occasional drought
  • Season of interest mid spring, late spring, early summer, midsummer, late summer, early fall
  • Flower color and fragrance White
  • Shape or form Mounded, Round
  • Growth rate Moderate
  • Wildlife Hummingbirds, Insect pollinators
  • More information

    Siebold’s hosta has massive dark bluish-grayish-green leaves that form a domed mound. From early summer to midsummer, long stems of numerous white flowers rise above the large leaves. Preferring shaded locations in moist, well-drained soils, Siebold’s hosta are well suited to beds, borders, cottage gardens, shade gardens, or underplanting trees and shrubs.

Size and method of spreading:

The mature height of Siebold’s hosta is 1 ½ to 2 feet and the spread is 4 to 5 feet. They spread by producing clones from their underground stem structure (rhizome). 

Native geographic location and habitat: (include C-value if appropriate)

Siebold’s hosta is a non-native perennial. 

Attracts birds or pollinators: 

Siebold’s hosta attracts hummingbirds, songbirds, bees, and butterflies.

Leaf description:

Siebold’s hostas have dark bluish-grayish-green leaves that are up to 14 inches long and 12 inches wide. The leaves are widely egg-shaped (ovate) with heart-shaped lobes at the bases (cordate bases) and abruptly pointed tips (cuspidate apices). Deep, arching, parallel veins cover the leaves. Siebold’s hostas have thick, waxy leaves. The leaves have wings along their stalks (petioles). 

Flower description:

The flowers of Siebold’s hostas grow on individual stalks (pedicels) that branch from a long, leafless central stem (scape) and mature from the bottom up (raceme). They are white to very faintly lilac and bell to funnel-shaped. 

Fruit description:

The fruit of Siebold’s hostas begin as long, medium-green structures (capsules) that eventually dry and split along seams to release seeds when they have matured. 

Plant Care:

It is easiest to divide Siebold’s hosta in the early spring, but it can be divided in autumn as well. Proper spacing and adequate air circulation can aid in preventing fungal issues. Keeping foliage dry while watering the plant will also help minimize disease.

List of pests, diseases, and tolerances:

Siebold’s hosta pests include leafhoppers, psyllids, grasshoppers, blister beetles, cutworms, slugs, snails, rabbits, deer, voles, and hosta leaf nematodes. Siebold’s hosta is susceptible to a number of fungal and viral issues, including hosta virus X. Once established, Siebold’s hosta can be somewhat drought tolerant.


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