shrub

Korean Arborvitae Glauca

Thuja koraiensis 'Glauca'

Not currently listed at our partner nurseries.

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Essentials

At a Glance

Plant Type

Shrub

Height

30 inches

Width

84 inches

Light

Full Sun

Zones

5, 6, 7, 8

Water

Moderate

Humidity

Moderate

Lifespan

50+ years

Native To

Korea, northeastern China

Toxicity

Toxic to pets and livestock if ingested in large quantities

The Story

Plant Bio

Thuja koraiensis, or Korean arborvitae, is an evergreen conifer. The 'Glauca' cultivar is a slow-growing, low, spreading shrub with dense, scale-like foliage. Distinguished by its beautiful silvery-blue upper foliage surface and silvery-white undersides, creating a striking two-tone effect. It maintains its excellent color throughout the year.

Bloom Period:

EarlyLate

Uses & Benefits:

Provides evergreen structure year-round, with silvery-blue foliage adding color contrast.

Drought tolerant once established, requiring minimal watering.

Attracts birds with its dense foliage, supporting local wildlife.

Marketplace

Where to Buy

We couldn't find this plant listed online right now.

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Planting

How to Grow

Select a sunny to partially shaded site with well-drained soil.
Tuck seedlings or cuttings into the ground, watering thoroughly.
Mulch around the base to retain moisture and suppress weeds.
Mist foliage during dry spells to keep it hydrated.
Fertilize in early spring with a balanced conifer fertilizer.
Prune lightly to shape after the first year.

Pro Tip

Ensure good drainage to prevent root rot and prune minimally for natural shape.

Keep It Thriving

Care Guide

Do

Water deeply during dry periods 🌱
Mulch annually to conserve moisture
Prune lightly after the first year

Don't

Avoid overwatering ❌
Don’t prune heavily in late summer
Avoid fertilizing late in the season

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Fertilize
Mulch
Prune

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Silver‑foliaged hedgeArchitectural specimen

Companion Plants

Japanese Pieris Dwarf Alberta Spruce Hosta Ferns Lavender

Multiply

Propagation Methods

Good to Know

Common Questions

Korean Arborvitae Glauca questions

What zones can Korean Arborvitae Glauca grow in?

Korean Arborvitae Glauca is hardy in USDA Zones 5–8. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Korean Arborvitae Glauca deer resistant?

Not reliably. Deer may browse Korean Arborvitae Glauca, especially tender spring growth — plan on repellents or fencing where pressure is high.

When does Korean Arborvitae Glauca bloom?

Korean Arborvitae Glauca typically blooms in early spring through late spring. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Korean Arborvitae Glauca need full sun?

Korean Arborvitae Glauca does best in full sun (6+ hours).