Black Walnut, Large Trees

Juglans nigra: Bareroot Black Walnut Trees in Standard Sizes

The Black Walnut, Juglans nigra, is a large, fast-growing deciduous tree with distinctive ridged bark and fragrant leaves that turn butter yellow in autumn.
It produces an abundance of nuts in the autumn: you will know that they are ready when you see lots of squirrels around your tree! The nuts are notoriously messy to remove from their husks, but the quality of the kernel is considered to be better than the common walnut that you normally see in the shops.
They are vigorous and can reach a height of about 30 metres in the British climate.

Standard trees are the largest size that we deliver; we also sell younger Black Walnut saplings as well as Common Walnut trees.
Browse our ranges of nut trees or fruit trees.

Delivery season: Walnut trees are delivered bareroot during late autumn and winter, approximately November-March inclusive.
Choosing a size: Small trees are cheaper, easier to handle and more forgiving of less than ideal aftercare, so they are best for a big planting project. If instant impact is your priority, or if you are only buying a few plants for use in a place where it is convenient to water them well in their first year, then you may as well use bigger ones. All our bareroot trees are measured by their height in centimetres above the ground (the roots aren't measured).

Features:

• Height: 30m
• Soil: Any fertile, deep and well drained
• Use: Parkland,
• Colour: Butter yellow Autumn leaves
• Not recommended for the North & Scotland
• RHS Award of Garden Merit
• Bareroot delivery only: November-March
  

Growing Black Walnut Trees

Suitable for any fertile, deep, well drained soil, they do need full sun. If you want good crops, a sheltered location is ideal.

To keep your tree at a relatively manageable size, the standard practice is to prune out the leading stem and maintain them as an open centred goblet.

Please note: Walnuts do not crop reliably North of about Liverpool, especially on the cooler Eastern side of the UK.

Harvesting: The nuts are perfectly ripe when you can squeeze the outer hulls with your fingers and easily leave a dent. They will start to fall of their own accord, but you can shake the tree with poles to encourage them.
Wear rubber gloves and work clothes, because they stain. Use a knife to slice around the hulls and then twist the halves in opposite directions to remove it.
Next, put the hulled nuts into a bucket of water and scrub them clean, or use a pressure hose. Discard any that float.
Dry them off (you can speed this up in a cool oven at 40°C) and store them in mesh bags for at least four weeks. Shake the bags every day at the start to ensure that they dry really well. They are now ready to eat and will keep for about a year in a cool, dry place.

Black Walnuts are infamous for preventing many other plants from growing underneath them. Here is a list of companion plants for Black Walnut.

Did You Know?

Black Walnuts are an American tree that was brought to Britain in the mid-1600's by John Tradescant. They are superb timber trees, and now grow wild in many parts of Southern England and Wales.

The biggest specimens in the world are around 50 metres tall, and they live for about 250 years.

Standard trees are measured by their girth in centimetres 1 metre above ground level: their trunk's waist measurement. Unlike sapling trees and hedge plants, standards aren't measured by their height, which will vary quite a bit both between and within species.
So, a 6/8cm standard tree has a trunk with a circumference of 6-8cm and an 8/10 standard has a trunk 8-10cm around. This measurement makes no difference to the tree's final height.
On average, standard trees are 2-3.5 metres tall when they arrive, but we cannot tell you precisely how tall your trees will be before we deliver them.