Trees

Quercus × warei 'Long'

Regal Prince oak

Also known as: Long

Regal Prince oak foliage detail. David J. Stang, via Wikimedia Commons, CC BY-SA 4.0; web-optimized with embedded copyright retained.

Regal Prince combines a tall, narrow crown with glossy green foliage, making a substantial oak possible where a broad canopy would be less suitable. The leaves develop yellow to brown autumn color, and the tree produces acorns. This English oak and swamp white oak hybrid is selected for a strong upright habit and mildew-resistant foliage.

At a glance

Sun: Full sun
Size: Height: About 45 ft in nursery landscape guidance · Width: About 18 ft
Water: Moist, well-drained soil
Hardiness: USDA zone 4

Sizes & prices

#15$264.99

Catalog updated September 8, 2026. This is not a live stock count; please call to confirm availability and price.

Ask about this plant

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Landscape use & tree form

Use: Architectural specimen
Form: Columnar to narrow oval
Major issues: Oak wilt and other regional oak diseases warrant monitoring; avoid unnecessary root or trunk wounds.
Growth rate: Relatively fast for an oak
Fruit / litter: Acorns and fallen leaves; acorns feed birds and small mammals.

Resistance & tolerances

Deer: Mixed nursery ratings; some list deer resistance, but it should not be relied upon where deer pressure is high.
Drought: Established trees have shown useful drought tolerance in Cornell field observations.
Wet soil: Tolerates wetter, poorly drained soil better than English oak; not a claim of permanent-flood tolerance.
Powdery mildew: Cultivar described as highly resistant by Van den Berk

Resistance is not a guarantee; deer and rabbits may browse any plant.

Pollinators & wildlife

Caterpillar host: Caterpillars

Seasonal interest

Foliage: Glossy green; yellow to brown in autumn
Fruit: Acorns

Growing & care

Pruning: Prune in the cold dormant season and follow local oak-wilt advisories; avoid spring and early-summer wounds.
Soil: Adaptable to wet or dry sites once established; allow adequate rooting space.

Sources & photo credits

Kaspar Nursery

Van den Berk Nurseries

University of Minnesota Extension

The Morton Arboretum

University of Minnesota Extension

Photo: David J. Stang, via Wikimedia Commons, CC BY-SA 4.0; web-optimized, embedded copyright retained. · CC BY-SA 4.0

Reviewed September 22, 2026. Growing conditions vary by location.