tree

Regal Prince Oak

Quercus robur bicolor 'Long'

Not currently listed at our partner nurseries.

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Essentials

At a Glance

Plant Type

Tree

Height

600 inches

Width

240 inches

Light

Full Sun

Zones

4, 5, 6, 7, 8

Water

Medium

Humidity

Adaptable

Lifespan

80+ years

Native To

Hybrid of European and North American species

Toxicity

Acorns are toxic to horses if ingested in large quantities.

The Story

Plant Bio

A hybrid of English and Swamp White Oak, this large deciduous tree is known for its adaptability and handsome foliage. It combines the best traits of its parents, including tolerance for both wet and dry soils. Regal Prince is distinguished by its tight, upright, columnar growth habit, making it ideal for narrower spaces. Its glossy, dark green leaves have attractive silvery undersides, creating a bicolor effect in the wind.

Bloom Period:

EarlyLate

Uses & Benefits:

Its striking columnar form and handsome bicolor foliage make it a premier architectural specimen for formal gardens, avenues, and tight urban spaces where a traditional oak would not fit.

Provides vertical screening and shade without a wide footprint. Its strong wood and structure make it a durable and long-lasting choice for street and park plantings.

Like other oaks, it supports a wide variety of insects, which in turn feed birds. Its acorns provide food for squirrels and other wildlife, and its dense canopy offers shelter and nesting sites.

Marketplace

Where to Buy

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Planting

How to Grow

Choose a location with full sun and adequate room for mature height.
Dig a planting hole two to three times wider than the root ball.
Place the tree in the hole, ensuring the root flare is at soil level.
Backfill with the original soil, gently firming to remove air pockets.
Water thoroughly after planting to settle the soil around the roots.
Apply a 2-3 inch layer of mulch, keeping it away from the trunk.

Pro Tip

Ensure good air circulation to show off the bicolor leaves and promote disease resistance.

Keep It Thriving

Care Guide

Do

Water deeply and regularly during the first few years to establish roots.
Perform structural pruning when young to encourage a strong central leader.
Provide ample space for its ultimate height, even with its narrow form.

Don't

Do not plant too deep; keep the root flare visible at the soil line.
Avoid excessive fertilization, which can lead to weak growth.
Don't allow turfgrass to grow directly against the trunk.

Seasonal Care Calendar

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

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Elegant vertical accent for formal landscapesStately street tree for narrow parkwaysEffective privacy screen when planted in a row

Companion Plants

Hydrangea paniculata Hosta 'Sum and Substance' Pennisetum alopecuroides Buxus 'Green Velvet' Geranium 'Rozanne'

Multiply

Propagation Methods

Good to Know

Common Questions

Regal Prince Oak questions

What zones can Regal Prince Oak grow in?

Regal Prince Oak is hardy in USDA Zones 4–8. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Regal Prince Oak deer resistant?

Yes — Regal Prince Oak is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.

When does Regal Prince Oak bloom?

Regal Prince Oak typically blooms in mid-spring through mid-spring. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Regal Prince Oak need full sun?

Regal Prince Oak does best in full sun (6+ hours).

Is Regal Prince Oak drought tolerant?

Yes — once established (usually after the first full season), Regal Prince Oak handles dry spells with minimal watering. Water deeply its first year to build the root system that makes that possible.