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Tree of the Month, Emerald City Tulip Tree

By Leonard Phillips


Trade Name: Emerald City Tulip Tree

Botanical Name: Liriodendron tulipifera ‘JFS-Oz’

Parentage: Cultivar of the native tulip tree, selected by J. Frank Schmidt& Son Co.

Family: Magnoliaceae

Introduction: 2009

Hardiness Zone*: 4 – 9

Height: 50′ – 60′

Spread: 25′ – 30′

Growth Rate: Fast, 60′ in 30 years, species grow up to 200 years of age

Form: Oval shape, compact branching

Bloom Period: June

Flower: Yellow to greenish yellow with orange center, tree has to be planted for 6 – 10 years before it blooms

Fruit: Cone of samaras, 2″ – 3″ long that turn brown in October dry pods persistent through winter

Spring Color: Mid green, leaves emerge like a flag shape before unfolding into a squarish shape

Summer Foliage: Deep green in summer

Autumn Foliage: Bright clear yellow

Winter Interest: Bark and seed cones provide winter interest

Bark: Grayish brown areas with furrows

Habitat: Grows well throughout most of the U.S.

Culture: Prefers rich, moist, well drained sandy soil, will not tolerate clay soil or drought, full sun

Pest Problems: Several minor problems, aphids cause sooty mold fungus making the leaves unsightly

Storm Resistance: Fair, may break up in ice and severe storms

Salt Tolerance: Poor

Planting: Transplant B&B, or by container in spring, difficult to plant bare root

Propagating: Must be grafted to species seedlings

Design Uses: Specimen for lawn, park, and residential use

Companions: Use with evergreen groundcovers

Other Comments: Excellent tree for special locations, uniform growing selection with straight, upright central leader

Available from: Many large retail nurseries.


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


These are the personal observations of the author, living in New England – Zone 6.

Leonard Phillips can be reached via e-mail at lenphillips@on-line-seminars.com


Photos provided by J. Frank Schmidt & Son Co.


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