Photo by Melody

PlantFiles: Thornless Honeylocust
Gleditsia triacanthos var. inermis 'Sunburst'

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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; Year of Registration or Introduction: 1953

2 vendors have this plant for sale.

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

Click thumbnail
to view:

By hczone6
Thumbnail #1 of Gleditsia triacanthos var. inermis by hczone6

By Baa
Thumbnail #2 of Gleditsia triacanthos var. inermis by Baa

By Baa
Thumbnail #3 of Gleditsia triacanthos var. inermis by Baa

By hczone6
Thumbnail #4 of Gleditsia triacanthos var. inermis by hczone6

By hczone6
Thumbnail #5 of Gleditsia triacanthos var. inermis by hczone6

By slyperso1
Thumbnail #6 of Gleditsia triacanthos var. inermis by slyperso1

By slyperso1
Thumbnail #7 of Gleditsia triacanthos var. inermis by slyperso1

There are a total of 13 photos.
Click here to view them all!

Profile:

1 positive
1 neutral
1 negative

Gardeners' Notes:

RatingAuthorContent
Positive coriaceous 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 treetoronto333 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 Joan On Oct 24, 2009, Joan from Belfield, ND (Zone 4a) wrote:


Editor's Note

Plant Patent number 1313 has expired

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



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