treeN. America Native

Skyline Honeylocust

Gleditsia triacanthos 'Skycole'

Not currently listed at our partner nurseries.

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Essentials

At a Glance

Plant Type

Tree

Height

540 inches

Width

420 inches

Light

Full Sun

Zones

4, 5, 6, 7, 8, 9

Water

Low to Medium

Humidity

Adaptable

Lifespan

Medium

Native To

Central North America

Toxicity

Non-toxic

The Story

Plant Bio

Gleditsia triacanthos is a fast-growing deciduous tree with fine, fern-like foliage that casts a light, dappled shade. Cultivars are typically thornless and seedless, unlike the species. 'Skycole', sold as Skyline, is a popular cultivar known for its strong central leader and distinctive, ascending, pyramidal form. It develops a broader vase shape with age and has excellent golden-yellow fall color. It is thornless and nearly fruitless.

Bloom Period:

EarlyLate

Uses & Benefits:

Valued for its delicate, fern-like texture which creates a light, dappled shade. It has a pleasing pyramidal form and reliable golden-yellow fall color.

An extremely tough tree that thrives in difficult urban conditions, including heat, drought, compacted soil, and salt spray. Its small leaflets are easy to clean up or can be left to decompose in the lawn.

The fragrant, though inconspicuous, flowers are a good source of nectar for bees and other pollinating insects. The open canopy allows for diverse underplantings.

Marketplace

Where to Buy

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Planting

How to Grow

Select a location in full sun; it tolerates a wide range of soils
Dig a hole as deep as the root ball and twice as wide
Place the tree in the hole, ensuring it is straight
Backfill with the original soil and water thoroughly
Mulch around the base to conserve moisture
Water regularly for the first year until established

Pro Tip

Its deep root system makes it very drought tolerant once established, but avoid planting near septic systems.

Keep It Thriving

Care Guide

Do

Prune in winter to maintain good structure.
Water deeply but infrequently once established.
Rake the small leaflets into the lawn as a natural fertilizer.

Don't

Do not overwater; it is susceptible to cankers in wet conditions.
Do not plant the straight species unless you want large thorns and messy seed pods.
Avoid over-planting in a monoculture to prevent widespread pest outbreaks.

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Pest Check
Prune

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Excellent tough street or parking lot treeLawn tree that allows grass to grow underneathFast-growing shade for urban settings

Companion Plants

Rudbeckia Echinacea Salvia nemorosa Pennisetum alopecuroides

Multiply

Propagation Methods

Good to Know

Common Questions

Skyline Honeylocust questions

What zones can Skyline Honeylocust grow in?

Skyline Honeylocust is hardy in USDA Zones 4–9. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Skyline Honeylocust deer resistant?

Yes — Skyline Honeylocust is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.

When does Skyline Honeylocust bloom?

Skyline Honeylocust typically blooms in late spring through early summer. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Skyline Honeylocust need full sun?

Skyline Honeylocust does best in full sun (6+ hours).

Is Skyline Honeylocust drought tolerant?

Yes — once established (usually after the first full season), Skyline Honeylocust handles dry spells with minimal watering. Water deeply its first year to build the root system that makes that possible.