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Rosehill Oak is excellent for parks, golf courses and commercial areas -- use as street tree only when space is available

Tree of the Month: Rosehill Oak

 By Len Phillips


Trade Name: Rosehill™ Oak

Botanical Name: Quercus robur x ‘Asjes’

Common Names: Pedunculate Oak, Common Oak, English Oak, Truffle Oak

Plant Patent: # 6539

Parentage: Quercus robur hybrid

Family: Fagaceae

Year of Introduction: 1996

Height: 40 to 60 feet

Spread: 20 feet

Form: Narrow oval to fastigiate shape

Bloom Period: Early to mid-March

Flower: 3- to 4-inch-long catkins in late March to early April

Fruit: 1-inch-long acorn, covered 1/3 with cup

Summer Foliage: Glossy, mid-green

Autumn Foliage: Yellow in the fall

Winter Color: Bark provides winter interest

Bark: Gray brown

Habitat: Europe

Culture: Tough and adaptable

Hardiness Zone*: 4 to 8

Growth Rate: Slow, increases when established

Pest Resistance: Resistant to mildew

Storm Resistance: Excellent

Salt Resistance: Good

Planting: Transplants readily as B & B provided the root ball is oversized and the tree is watered frequently during the first season

Pruning: Seldom needs pruning except to raise lower branches

Propagating: Budded onto Q. robur understock

Design Uses: Excellent for parks, golf courses and commercial areas, use as street tree only when space is available

Companions: Use with shrubs such as Taxus, evergreen Euonymus and perennials

Other Comments: Average appearance in New England

Available From: Difficult to find in retail nurseries, look in the largest wholesale nurseries


* For information about the USDA Hardiness Zone Map, visit www.usna.usda.gov/Hardzone/index.html


This information has been gathered from personal observations of the author, living in New England Zone 5, and information provided by J. Frank Schmidt & Son nursery. Len Phillips can be reached via email at lenphillips@on-line-seminars.com

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