Key features
AwardsRHS Award of Garden Merit
Final size9 x 7 metres in 20 years
FoliageLarge green leaves with autumn colour (deciduous)
FruitWalnuts
SoilPrefers well-draining soil
Description
Growing to an eventual height and spread of 9 x 7 metres in 20 years, Juglans Nigra provides a large specimen tree. The foliage, which is fragrant when crushed, is large, oblong and purple-green when young, turning to green in the summer and then yellow, bronze in the autumn.
Tasty black walnuts are formed, encased in green fruits on older trees in the autumn. With a pleasing rounded shape, this Black Walnut Tree will grow in any well-drained soil in sun or partial shade and exposure can be tolerated. Juglans Nigra makes a pleasant addition to any garden. Browse all nut trees.
AKA Black walnut, American walnut, Walnut tree
Planting Steps
1Preparation
- Pot-grown plants can be planted at any time of year, whereas bare roots need to be planted between November and March.
- Clear weeds and grass within a metre of the planting hole.
- Dig a hole as deep as the root mass and twice as wide.
- To help your plant establish more effectively, sprinkle Rootgrow in the hole.
2Planting
- Gently loosen the roots and place into the planting hole.
- Ensure the top of the plant’s compost is flush with the level of the surrounding soil and the graft union or collar of the tree is above ground level.
- Mix 50% of the original soil with 50% compost.
- Fill in the hole, firming the soil gently.
3Last Steps
- Water generously around the base of the plant.
- If you are planting either a single stem tree or mature standard tree, we recommend adding a staking kit and rabbit guard.
Aftercare Advice
Trees and shrubs require a good watering regime for a couple of years whilst they establish. Water well and regularly through spring and summer, increasing in hot or dry weather. If planting in autumn, you may only need to water a little. It is advisable to keep the area free of competing weeds and grass during this period.
For more detailed advice and video guides, please visit our Help & Advice section.
