North America Native Plant

Kentucky Yellowwood

Botanical name: Cladrastis kentukea

USDA symbol: CLKE

Life cycle: perennial

Habit: tree

Native status: Non-native, reproduces and persists in the wild in Canada âš˜ Native to the lower 48 states  

Synonyms: Cladrastis lutea (Michx. f.) K. Koch (CLLU)  âš˜  Sophora kentukea Dum. Cours. (SOKE)   

Kentucky Yellowwood: A Hidden Gem for Your Landscape If you’re looking for a native tree that combines stunning spring blooms, gorgeous fall color, and year-round architectural beauty, let me introduce you to the Kentucky yellowwood (Cladrastis kentukea). This underappreciated gem might just be the perfect addition to your garden – ...

Kentucky Yellowwood: A Hidden Gem for Your Landscape

If you’re looking for a native tree that combines stunning spring blooms, gorgeous fall color, and year-round architectural beauty, let me introduce you to the Kentucky yellowwood (Cladrastis kentukea). This underappreciated gem might just be the perfect addition to your garden – if you have the space and patience for its spectacular show.

What Makes Kentucky Yellowwood Special?

Kentucky yellowwood, also simply called yellowwood, is a true showstopper when it decides to put on a display. This native perennial tree is known for its breathtaking clusters of fragrant white flowers that drape from its branches like nature’s own chandelier. But here’s the quirky thing about this tree – it doesn’t bloom every year! Kentucky yellowwood typically flowers heavily every 2-3 years, making each blooming season feel like a special celebration.

Beyond its floral drama, this tree offers beautiful green foliage that transforms into brilliant yellow fall color, smooth gray bark, and an elegant branching structure that provides winter interest long after the leaves have dropped.

Where Does Kentucky Yellowwood Call Home?

This native beauty naturally grows across a wide swath of the eastern United States, including Alabama, Arkansas, Connecticut, Georgia, Illinois, Indiana, Iowa, Kentucky, Louisiana, Maine, Massachusetts, Mississippi, Missouri, New York, North Carolina, Ohio, Oklahoma, Pennsylvania, Rhode Island, Tennessee, and Virginia. It has also naturalized in Ontario, Canada. Its native range primarily centers around the Appalachian region and Ohio River Valley.

Size and Growth Expectations

Kentucky yellowwood is a moderate grower that will reward your patience with impressive size. Expect your tree to reach about 25 feet tall in its first 20 years, eventually maturing to around 40 feet in height. With its single-stem growth habit and erect, graceful shape, it develops into a substantial shade tree perfect for larger properties.

The tree features dense summer foliage that provides excellent shade, while its porous winter structure allows light to filter through during the dormant season – the best of both worlds!

Perfect Garden Settings

Kentucky yellowwood shines as a specimen tree where it has room to show off its natural form. It’s ideal for:

  • Large residential landscapes
  • Parks and public spaces
  • Formal garden settings
  • Naturalistic woodland gardens
  • Areas where you want a stunning focal point

This tree works beautifully in USDA hardiness zones 4-8, making it suitable for a wide range of climates.

Growing Conditions That Make Kentucky Yellowwood Happy

The good news is that Kentucky yellowwood isn’t particularly fussy once you understand its preferences:

  • Soil: Thrives in coarse to medium-textured, well-draining soils. It’s not fond of heavy clay or fine-textured soils.
  • pH: Adaptable to a range from 4.8 to 7.5, so most garden soils will work fine
  • Sun exposure: Prefers full sun but tolerates partial shade (intermediate shade tolerance)
  • Water: Has medium drought tolerance once established and low moisture requirements
  • Fertility: Low fertility requirements – it’s not a heavy feeder

Planting and Care Tips

Here’s how to give your Kentucky yellowwood the best start:

  • Planting: You can find this tree routinely available from nurseries as bare root plants or in containers
  • Spacing: Plant 300-700 trees per acre if doing mass plantings, but for home landscapes, give it plenty of room to spread
  • Root depth: Ensure at least 24 inches of soil depth for proper root development
  • Cold stratification: Seeds require cold stratification, so if you’re growing from seed, plan accordingly
  • Patience: This tree has a long lifespan and moderate growth rate, so think of it as an investment in your landscape’s future

Pollinator and Wildlife Benefits

When Kentucky yellowwood does bloom, it’s a pollinator magnet! The fragrant white flower clusters appear in early summer and attract bees and other beneficial insects. The tree also produces brown seed pods that persist through summer, though they don’t tend to stick around long-term.

A Few Things to Keep in Mind

Kentucky yellowwood is generally a low-maintenance tree, but there are a few quirks to be aware of:

  • It has no fire resistance, so avoid planting in fire-prone areas
  • The tree doesn’t fix nitrogen, so don’t expect it to improve soil fertility
  • It has low tolerance for hedging – let it grow naturally
  • Seeds spread slowly, so it won’t become weedy

Is Kentucky Yellowwood Right for Your Garden?

If you have the space for a medium to large tree and appreciate plants that offer seasonal drama, Kentucky yellowwood could be perfect for you. It’s especially wonderful for gardeners who enjoy the anticipation of its irregular but spectacular blooming cycles. This native tree combines beauty, wildlife value, and relatively easy care once established.

Just remember – good things come to those who wait, and Kentucky yellowwood is definitely worth the wait!

How

Kentucky Yellowwood

Grows

Growing season

Spring and Summer

Lifespan

Long

Growth form & shape

Single Stem and Erect

Growth rate

Moderate

Height at 20 years

25

Maximum height

40.0

Foliage color

Green

Summer foliage density

Dense

Winter foliage density

Porous

Foliage retention

No

Flowering

Yes

Flower color

White

Fruit/seeds

Yes

Fruit/seed color

Brown

Allelopath

No

Nitrogen fixing

None

Toxic

None

C:N Ratio

High

Fire Resistant

No

Foliage Texture

Medium

Low-growing Grass

No

Resproutability

Yes

Coppice Ability

No

Bloat

None

Kentucky Yellowwood

Growing Conditions

Adapted to Coarse Soil

Yes

Adapted to Medium Soil

Yes

Adapted to Fine Soil

No

Anaerobic tolerance

None

CaCO₃ tolerance

Medium

Cold Stratification

Yes

Drought tolerance

Medium

Nutrient requirement

Low

Fire tolerance

None

Frost-free days minimum

180

Hedge tolerance

Low

Moisture requirement

Low

pH range

4.8 to 7.5

Plants per acre

300 to 700

Precipitation range (in)

36 to 55

Min root depth (in)

24

Salt tolerance

None

Shade tolerance

Intermediate

Min temperature (F)

-32

Cultivating

Kentucky Yellowwood

Flowering season

Early Summer

Commercial availability

Routinely Available

Fruit/seed abundance

High

Fruit/seed season

Summer to Summer

Fruit/seed persistence

No

Propagated by bare root

Yes

Propagated by bulb

No

Propagated by container

Yes

Propagated by corm

No

Propagated by cuttings

Yes

Propagated by seed

Yes

Propagated by sod

No

Propagated by sprigs

No

Propagated by tubers

No

Seed per pound

12000

Seed spread rate

Slow

Seedling vigor

Medium

Small grain

No

Vegetative spread rate

None

Kentucky Yellowwood

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Rosidae

Order

Fabales

Family

Fabaceae Lindl. - Pea family

Genus

Cladrastis Raf. - yellowwood

Species

Cladrastis kentukea (Dum. Cours.) Rudd - Kentucky yellowwood

Plant data source: USDA, NRCS 2025. The PLANTS Database. https://plants.usda.gov,. 2/25/2025. National Plant Data Team, Greensboro, NC USA