Juglans regia (Persian walnut or English walnut)

Climate

The climate and altitude preferences of this plant include cool temperate climates and regions with altitudes suitable for its growth.

Common Name

Persian walnut

Description

Juglans regia, also known as the Persian walnut or English walnut, is a slow-growing, broad-crowned tree that can reach heights of up to 24 meters. It produces round nuts with a hard shell and a flavorful kernel that is commonly used in cooking and baking. The wood of this tree is highly valued for its decorative grain and durability, making it sought after for furniture and cabinetry.

Genus
Walnuts
Grouping
Nuts
Latin Name

Juglans regia

Origin

Persia

Other Relevant Information

Other relevant information about the Juglans regia (Persian or English walnut) includes: - The tree is known for its deep root system, which helps it access water and nutrients from the soil. - It requires a chilling period during winter to properly break dormancy and ensure optimal fruiting. - The nuts have a high oil content, making them valuable for culinary and commercial purposes. - The tree is susceptible to certain diseases and pests, including walnut blight, walnut husk fly, and walnut aphids. - In addition to its culinary uses, the wood of the walnut tree is highly valued for its beauty and durability. - The tree provides shade and shelter for wildlife, and its leaves make excellent compost material. - Juglans regia is native to regions in Central Asia but is now cultivated in various parts of the world. - It is a long-lived tree, with some specimens known to live for several hundred years. These additional details provide a more comprehensive understanding of the Juglans regia tree and its significance in various aspects of human life and the environment.

Soil Preferences

- Deep, well-drained soil - Incorporate organic matter

Specific species
Uses
Timber
Suitability to cool temperate climate
High

This walnut is a slow growing, broad - crowned tree up to 24 m high and is in common commercial use. Yields of 150 - 200 kg/tree have been recorded.

The nuts are eaten raw and in almost every conceivable form of cooking. Unripe fruits are added to jams, preserved in vinegar or syrup and made into brandy. The oil is used in cooking and on salads. The leaves, used as a tea, are a tonic to the stomach, promote good appetite and are used as a treatment for catarrhal enteritis. A decoction is used for rheumatism, gout, glandular swelling, scrofula, gum problems, sweaty feet, skin problems including acne and dandruff, and for excessive milk flow after a child has been weaned. A decoction of the green shell surrounding the walnut is recommended for failing virility.

Nutritional composition of the walnut per 100 grams of edible portion is: Water - 3.5%, Energy - 651 calories, Carbohydrate - 15.8 g, Fat - 64.0 g, Protein - 14.8 g, Ash - 1.9 g, Calcium - 99 mg, Potassium - 450 mg, Sodium - 2 mg, Magnesium - 131 mg, Iron - 3.1 mg, Phospho-rous - 380 mg, Chlorine - 12 mg, Sulphur - 22 mg, Silicon - 12 mg, Iodine - 0.003 mg, Vitamin A - 30 I.U., Thiamin - 0.33 mg, Riboflavin - 0.13 mg, Niacin - 0.9 mg, Ascorbic acid - 2 mgs and the digestion time is 3 hours.

This is the most sought after walnut timber, as it has the most decorative grain, is durable, takes a high polish and is not prone to splitting. It has been the preferred timber for trimming in prestige cars, and is prized for gun butts because of its resilience.

  • Description: The English walnut tree is a large, deciduous tree that can grow up to 25-35 meters tall. It has pinnate leaves with 5-9 leaflets and produces round nuts encased in a green, fleshy husk that turns brown and splits open as the nuts mature. The walnuts have a hard shell with a rich, flavorful kernel inside, commonly used in baking, cooking, and as a nutritious snack. Walnut wood is also highly valued for its quality and is used in high-end furniture and cabinetry.
  • Companions: Clover, comfrey, garlic, yarrow.
  • Preparation: Select a site with deep, well-drained soil. Incorporate organic matter.
  • Planting: Space trees 12-18 meters apart. Plant in early spring or autumn.
  • Pruning: Prune in late winter to remove dead or crossing branches.
  • Other Suggestions: Mulch to conserve moisture and suppress weeds. Protect from late frosts.

Juglans regia (Persian or English walnut): Typically begins producing nuts after 4-7 years.

In the cool temperate climate of West Gippsland, Victoria, Australia, the most commonly grown walnut is the Juglans regia (Persian or English walnut). This species is well-suited to the climate conditions found in this region, which include cool winters and mild summers. The English walnut is favored for its relatively quick production time, high-quality nuts, and adaptability to various soil types. Additionally, its nut is well-regarded for its taste and is widely used in culinary applications.