Botanical profile

Juglans nigra

Latin name
Juglans nigra
Common name
Black Walnut
Type
Leafy
Family
Juglandaceae

Juglans nigra is an imposing and majestic ornamental tree, better known as the black walnut, valued for its rich green foliage that creates dense, structured shade, ideal for large gardens, parks, or open landscaped areas. Its rounded, spreading silhouette provides a balanced and elegant presence, while its edible (hard-shelled) nuts offer an additional point of interest for harvesters. In autumn, the foliage turns warm yellow hues, adding a colorful dimension to the colder season. Very hardy and robust, this tree prefers a sunny to semi-shady exposure and fertile, deep, well-drained soil to fully develop its potential. Juglans nigra combines dark foliage, imposing structure, and practical use, making it an excellent choice for any large landscape planting.

Care guide

Growing conditions

Light, soil, water and hardiness

Hardiness zone
Zone 4–8
Exposure
Sun
Watering
Low to medium
Fertilization
Balanced spring salad
Soil type
Fertile, deep, and well-drained
Minimum temperature
-34°C
Plant appearance

Blooming, foliage and shape

Blooming period
May
Flower color
Subtle green (spring)
Fruiting
Edible hard-shelled nuts
Foliage color
Rich green ? warm yellow (autumn)
Foliage type
Obsolete
Shape
Rounded / Spread
Garden structure

Size and growth

Height
20 m (66 ft)
Width
18 m (60 ft)
Growth rate
Slow to medium
Vegetable garden and yield

Companion planting, spacing and harvest

Fruit tree type
Walnut tree
Not recommended for pets
Not recommended for pets

Pets

Butterflies
Plants that attract butterflies

Butterflies

The availability of our plants varies depending on arrivals, seasons, nursery production and supplier availability. Some varieties may be offered for a limited time only, depending on their natural cycle or current stock. These plant profiles are designed to guide and inspire you when choosing plants for the garden, landscaping projects, containers or long-lasting outdoor arrangements.