Thornless Honeylocust
Gleditsia triacanthos var. inermis 'Sunburst'

Family: Caesalpiniaceae (ses-al-pin-ee-AY-see-ee) (Info)
Genus: Gleditsia (gleh-DIT-see-uh) (Info)
Species: triacanthos var. inermis
Cultivar: Sunburst
Additional cultivar information:(PP1313, aka Suncole)
Hybridized by Cole
Registered or introduced: 1953

Category:

Trees

Height:

over 40 ft. (12 m)

Spacing:

15-20 ft. (4.7-6 m)

Hardiness:

USDA Zone 3a: to -39.9 C (-40 F)

USDA Zone 3b: to -37.2 C (-35 F)

USDA Zone 4a: to -34.4 C (-30 F)

USDA Zone 4b: to -31.6 C (-25 F)

USDA Zone 5a: to -28.8 C (-20 F)

USDA Zone 5b: to -26.1 C (-15 F)

USDA Zone 6a: to -23.3 C (-10 F)

USDA Zone 6b: to -20.5 C (-5 F)

USDA Zone 7a: to -17.7 C (0 F)

USDA Zone 7b: to -14.9 C (5 F)

USDA Zone 8a: to -12.2 C (10 F)

USDA Zone 8b: to -9.4 C (15 F)

Sun Exposure:

Full Sun

Danger:

N/A

Bloom Color:

Inconspicuous/none

Bloom Time:

N/A

Foliage:

Grown for foliage

Deciduous

Other details:

Average Water Needs; Water regularly; do not overwater

Soil pH requirements:

6.1 to 6.5 (mildly acidic)

6.6 to 7.5 (neutral)

7.6 to 7.8 (mildly alkaline)

Patent Information:

Patent expired

Propagation Methods:

From seed; direct sow outdoors in fall

Scarify seed before sowing

By grafting

Seed Collecting:

Allow pods to dry on plant; break open to collect seeds

Properly cleaned, seed can be successfully stored

Regional

This plant has been said to grow in the following regions:

Crestline, California

Clifton, Colorado

Divide, Colorado

Peyton, Colorado

Spring Grove, Illinois

Waterman, Illinois

Valley Lee, Maryland

Jamaica Plain, Massachusetts

Grand Rapids, Michigan

Saint Clair Shores, Michigan

Webb City, Missouri

Middletown, Ohio

Shelton, Washington

New Glarus, Wisconsin

Watertown, Wisconsin

show all

Gardeners' Notes:

1
positive
1
neutral
1
negative
RatingContent
Positive

On Mar 2, 2015, coriaceous from ROSLINDALE, MA wrote:

All 13 pics show the foliage just after the tree has leafed out in the spring. The chartreuse color fades to the same green as the species fairly quickly. For most of the season, the foliage is mostly green, and only chartreuse near the growing points at the tips of the twigs.

Allergy to the pollen is fairly common.

This cultivar produces few seedpods, which reduces cleanup. Seedlings may not come true. This cultivar is exceptionally susceptible to nectria canker.

Negative

On Mar 1, 2015, treetoronto333 from Toronto
Canada wrote:

Planted in the back corner of my yard about 10 years ago (was about 15 feet at planting). Has poor form and recently suffered from ice damage. It also had aphids in early spring, sometimes taken long to leaf out.

Neutral

On Oct 24, 2009, Joan from Belfield, ND (Zone 4a) wrote:


Editor's Note

Plant Patent number 1313 has expired