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Thornless Honeylocust

Gleditsia triacanthos var. inermis

Family: Caesalpiniaceae (ses-al-pin-ee-AY-see-ee) (Info)
Genus: Gleditsia (gleh-DIT-see-uh) (Info)
Species: triacanthos var. inermis



Foliage Color:

Unknown - Tell us

Bloom Characteristics:

Unknown - Tell us

Water Requirements:

Drought-tolerant; suitable for xeriscaping

Average Water Needs; Water regularly; do not overwater

Where to Grow:

Unknown - Tell us


30-40 ft. (9-12 m)

over 40 ft. (12 m)


20-30 ft. (6-9 m)

30-40 ft. (9-12 m)


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


Unknown - Tell us

Bloom Color:

Pale Yellow

Bloom Time:

Mid Spring


Grown for foliage


Other details:

Unknown - Tell us

Soil pH requirements:

Unknown - Tell us

Patent Information:


Propagation Methods:

Unknown - Tell us

Seed Collecting:

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

Allow seedheads to dry on plants; remove and collect seeds

Properly cleaned, seed can be successfully stored


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

Phoenix, Arizona

Port Saint Lucie, Florida

Evanston, Illinois

Roslindale, Massachusetts

Ashland, Nebraska

Lincoln, Nebraska

Elephant Butte, New Mexico

Farmington, New Mexico

Roswell, New Mexico

Middletown, Ohio

Gibsonia, Pennsylvania

Orem, Utah

South Jordan, Utah

Davenport, Washington

show all

Gardeners' Notes:


On Mar 7, 2014, recentcoin from Celeste, TX wrote:

There are both seedless and thorn-less varieties of this tree. I highly recommend investigating the use of those since the 3 complaints about this tree are 1) thorns, 2) seed pods, and 3) invasive suckers.

This tree really needs to be kept somewhat dry in order to stop the suckers. In Texas, where it is from, it grows quite well in hot dry summers.


On Mar 7, 2014, coriaceous from ROSLINDALE, MA wrote:

This is the thornless variety from which the many widely planted cultivars have been selected. Most people find the many large seedpods to be a maintenance headache when they fall. Some of the cultivars have far fewer pods, and are preferable to this variety.

Most of the so-called "seedless" cultivars will produce some seedpods under some conditions, but generally not enough to cause problems. For that matter, many of the "thornless" cultivars will produce an occasional thorn. Take care in handling these plants.

Gracefully vase-shaped, generally 30-70', though as much as 100' is possible. This is one of the few shade trees (together with oaks and hickories) in whose shade a lawn can thrive. Its leaves are late to appear in the spring and early to color and dr... read more


On Mar 2, 2008, angele wrote:

I have this tree growing in the southwest corner of my yard & I love it. It provides nice shade in the summer. The bees are crazy for the flowers. I like the shape too.


On Nov 9, 2004, smiln32 from Oklahoma City, OK (Zone 7a) wrote:

This tree transplants very easily. It withstands a wide range of conditions although it reaches maximum development on rich, moist bottomlands or on soils of a limestone origin.

It is tolerant of drought conditions, high soil pH and salty conditions.

It is an excellent lawn tree for filtered shade and grows very quickly.