Juglans nigra Black Walnut

$250.00

Tax included. Shipping calculated at checkout.

Title: 40cm/45L

40cm/45L

All stock is grown, maintained and graded in strict accordance with AS 4373-2007, Australian Standard for Nursery Stock.

Current Stock Height Guides

40cm/45L: Enquire within for height guide information.

Height guide disclaimer: Height ranges are approximate only. As living products, plant heights naturally vary between individual plants, batches, and seasons. No guarantee is given that supplied plants will fall within the stated range. If minimum heights are required, you mustconfirm current batch heights with Evergreen Trees Direct prior to purchase. Variation in height is normal and is not grounds for return, refund, replacement, or compensation.

Mature Height & Width

Mature Height: 20m - 30m Approximately

Mature Width: 15 – 30 meters

Juglans nigra Black Walnut is expected to grow 40 – 60 cm per year (moderate to fast) .

Root Ball Dimensions (Height & Width)

Use this as a reference when digging your planting hole. We recommend digging at least 10% wider than the dimensions below to encourage strong root development.

30cm Pot: 33cm (W) × 30cm (D)
40cm/45L Pot: 44cm (W) × 41.5cm (D)
50cm Pot / 70L Pot: 55cm (W) × 41.8cm (D)
100L Bag: 50.6cm (W) × 52.8cm (D)
150L Bag: 66cm (W) × 55cm (D)
200L Bag: 71.5cm (W) × 60.5cm (D)
300L Bag: 88cm (W) × 63.8cm (D)
400L Bag: 99cm (W) × 66cm (D)
500L Bag: 122cm (W) × 66cm (D)
750L Bag: 134cm (W) × 69cm (D)
1000L Bag: 146.3cm (W) × 71.5cm (D)
2000L Bag: 176cm (W) × 82.5cm (D)

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Shipping Cost

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Email: sales@evergreentrees.com.au

Phone: (03) 7042 3318

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15% off orders over $2,000
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About Your New Juglans nigra Black Walnut

Juglans nigra, the Black Walnut, is a majestic deciduous tree valued both for its exceptional timber and its stately presence in the landscape. Large pinnately compound leaves provide lush green shade through the warmer months, turning a clear yellow in autumn.

Black Walnut grows to 15-25 metres tall and wide, developing a rounded canopy on a straight trunk for a grand, stately form. It makes a magnificent shade tree for large gardens, rural properties, and parks. Trees produce edible walnuts with a rich distinctive flavour after several years.

Black Walnut performs best in cool to temperate regions including VIC, NSW, ACT, Tasmania, and elevated parts of SA and WA, in full sun with deep well-drained soil. It is drought tolerant once established and low maintenance. Note its roots release juglone, a natural compound that can inhibit some other plants nearby.

Frequently Asked Questions

About Juglans nigra Black Walnut

How tall does Black Walnut grow?

Juglans nigra grows to 15-25 metres tall and 12-18 metres wide with a broad rounded canopy.

How fast does Black Walnut grow?

Black Walnut is moderately fast-growing, adding 50-80cm per year once established.

Does Black Walnut produce edible nuts?

Yes. Juglans nigra produces edible walnuts with a rich, distinctive flavour, encased in a hard shell. Trees take several years to begin bearing.

Is Black Walnut deciduous?

Yes. Black Walnut is fully deciduous, with large compound leaves that turn yellow in autumn before dropping in winter.

Is Black Walnut suitable for residential gardens?

Black Walnut suits large gardens, rural properties, and parks due to its mature size. Note that its roots release juglone, a natural compound that can inhibit some other plants nearby.

Where does Black Walnut grow best in Australia?

Black Walnut performs best in cool to temperate regions including VIC, NSW, ACT, Tasmania, and elevated parts of SA and WA, in deep well-drained soil.

How far apart should I plant Black Walnut?

Plant 8-12 metres apart given the broad mature canopy, or as individual specimens with plenty of room.

Enriched Planting Mix (AO Certified)

$21.95

Features and Benefits

Organically certified product
Improves aeration for roots
A rich blend of Pure Magic Compost, composted animal manure, Gypsum, composted coarse bark and wetting agent
Excellent to mix with heavy clay soils, an organic mixture with added gypsum which is perfect for exotic plants
Revitalises tired soils, adds nutrient and organic matter, no chemical additives, weed free
Assists in retaining moisture in the soil longer after rain or watering

Directions For Use

Water plant well at least several hours prior to planting.
Dig a hole at least twice the width of the pot and 7cm deeper than the pot.
Mix Grow Better Enriched Planting Mix with the soil that has been dug out of the hole, adding about 1/3 planting mix.
Spread a 7cm layer of improved soil in the hole and remove plant from the pot. Tease roots gently if the root ball is very firm and place plant in the planting hole. Check that pot soil is level with the surrounding soil surface level, not higher or lower.
Fill in the hole with improved soil mixture, firm down soil and water well adding Grow Better Plant Starter to final watering.

View full details

Type:

Enriched Planting Mix (AO Certified)

$21.95

Type: Australian Native

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Uses in my Garden

Shade Tree
Feature Tree
Rural Property Planting

Juglans nigra Black Walnut works in an:

Edible Garden – integrates fruit, herbs, and productive plants.
Woodland Garden – layered, naturalistic design under dappled light.
Low-maintenance Garden – resilient choices for easy care and year-round appeal.

Is Juglans nigra Black Walnut Evergreen or Deciduous?

Juglans nigra Black Walnut is an Deciduous (Defoliates throughout colder months) Tree

Mature Height & Width

Mature Height: 20m - 30m Approximately

Mature Width: 15 – 30 meters

Juglans nigra Black Walnut is expected to grow 40 – 60 cm per year (moderate to fast) .

Growth Rate of Juglans nigra Black Walnut

Juglans nigra Black Walnut is expected to grow 40 – 60 cm per year (moderate to fast) .

They are considered to have a:

Fast Growth Rate

Frost Tolerance & Ideal Climate to plant Juglans nigra Black Walnut

Is Juglans nigra Black Walnut frost tolerant?

Juglans nigra Black Walnut is Frost Hardy – Survives heavy and frequent frost without damage.

Does Juglans nigra Black Walnut Flower?

Juglans nigra produces long, greenish-yellow male catkins and small, inconspicuous female flowers in mid- to late spring. The blooms are subtle and largely hidden within the canopy, with the tree’s seasonal interest coming more from its bold foliage and developing walnuts than from its flowering display.

Does Juglans nigra Black Walnut flower?

Yes - Flowers

Flowering Period:

Spring

Flower Type:

Not Applicable

Flower Colour:

Not Applicable

Is Juglans nigra Black Walnut an Australian Native Tree?

No

Juglans nigra Black Walnut is Native to Eastern North America, from southern Canada through the United States, where it grows naturally in fertile, well-drained soils along river valleys and forests.

What is the Wildlife Value of Juglans nigra Black Walnut ?

Its highly nutritious walnuts provide food for birds and small mammals, while the broad, spreading canopy offers excellent nesting and shelter habitat for small birds. The textured bark supports insects and microfauna, and the leaf litter contributes to a rich woodland ecosystem beneath the tree.

How much Sunlight does Juglans nigra Black Walnut need?

Juglans nigra Black Walnut will thrive best in:

Full Sun

Preferred Soil?

Juglans nigra performs best in deep, well-drained loam or sandy loam soils and prefers slightly acidic to neutral conditions. It may struggle in compacted clay or very shallow soils unless improved with organic matter to enhance drainage and root depth. Keep soil evenly moist during establishment, then provide deep, occasional watering as the tree matures to support strong structure, nut development and long-term vigour.

Is Juglans nigra Black Walnut Drought Tolerant?

Is Juglans nigra Black Walnut Drought tolerant?

As a young tree it requires regular watering, but once established Black Walnut develops moderate drought tolerance. It performs well in warm, dry conditions provided it receives deep, occasional watering during extended dry spells to maintain canopy health, nut production and steady growth.

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How To Plant Your Juglans nigra Black Walnut

How to Plant Juglans nigra 'Black Walnut':

Select an Ideal Location: Choose a sunny spot with well-draining soil.

Dig a Planting Hole: Dig a hole as deep as the root ball and twice as wide.

Position the Tree: Place the Black Walnut tree in the hole, ensuring the top of the root ball is level with the surrounding soil.

Backfill with Soil: Fill the hole with soil, gently packing it to remove air pockets.

Water Thoroughly: Water the tree thoroughly after planting to help settle the soil.

Recommended Planting Spacing For Your Juglans nigra Black Walnut

Feature Planting: Space 10 – 15 m apart to allow full canopy development

Hedging & Screening: Not suitable

Avenue Planting: Space 12 – 15 m apart for formal canopy spacing

Juglans nigra Black Walnut is expected to grow 40 – 60 cm per year (moderate to fast) .

Fast Growth Rate

Long Term Care For Your Juglans nigra Black Walnut

Caring for Your Juglans nigra 'Black Walnut':

Watering: Young Black Walnut trees require regular watering to establish deep roots. Mature trees can tolerate dry spells.

Pruning: Prune to remove dead or crowded branches during the dormant season.

Fertilization: Apply a balanced fertilizer in spring to support healthy growth.

Planting Your Juglans nigra Black Walnut in Different Soil

Ideal Drainage: Prefers deep, fertile, and well-drained soil.

Sandy Soils: Requires organic amendments to ensure sufficient moisture and nutrient supply.
Clay Soils: Must be well-amended to improve drainage and prevent root rot.
Loamy Soils: Ideal, particularly if deep and rich in organics.
Acidic or Alkaline Soils: Performs best in slightly acidic to neutral soils; adjust pH accordingly.

Frequently Asked Questions

Frequently Asked Questions (FAQs):

Q: Can I plant other vegetation near Black Walnut trees?
A: Exercise caution when planting other vegetation near Black Walnut trees, as they release juglone from their roots, which can inhibit the growth of certain plants.

Q: What is the primary use of Black Walnut trees?
A: Black Walnut trees are primarily valued for their high-quality timber, which is used in various woodworking applications. Additionally, they provide shade and ornamental beauty in landscapes.