Juglans regia
TAXONOMY
FamilyJuglandaceae
GenusJuglans
Zone5
LEARN MORE
Plants of the World OnlineABOUT
Juglans regia, commonly known as the English walnut or Persian walnut, is a large deciduous tree native to the region stretching from the Balkans eastward to the Himalayas and southwest China. It is widely cultivated for its edible nuts and high-quality wood. The tree undergoes a dormancy period during the winter months.
ALSO KNOWN AS
English Walnut
Persian Walnut
Juglans aspleniifolia
Juglans duclouxiana
Juglans fallax
Juglans fertilis
Juglans frutescens
Juglans fruticosa
Juglans kamaonia
Juglans longirostris
Juglans orientis
Juglans ×quercifolia
Juglans regia subsp. fallax
Juglans regia subsp. sinensis
Juglans regia var. kamaonia
Juglans regia var. sinensis
Juglans salicifolia
Juglans sinensis
OVERVIEW
VPDCalculate
WaterDry
SoilLoamy
LightDirect Bright (6 Hours)
Temperature15° C
Humidity60%
GDD5,475
Dormancy3 Months
pH6.5
Pressure1,013 mbar
DETAILS
Care Instructions
Juglans regia thrives in temperate climates with moderate temperatures. It requires direct bright light for optimal growth and prefers soil that dries out almost completely between waterings. The tree benefits from moderate humidity levels and should be protected from extreme cold.Harvest
Juglans regia, commonly known as the English walnut, is typically harvested in the fall, usually from late September to early November. The nuts are ready for harvest when the outer green husks begin to split and the nuts start to fall from the tree. To harvest, collect the fallen nuts from the ground or shake the tree gently to dislodge the remaining nuts. After harvesting, remove the husks and allow the nuts to dry in a well-ventilated area for several weeks to reduce moisture content and prevent mold. Proper drying is crucial for long-term storage and maintaining nut quality.Soil
The English walnut prefers well-draining loam soil with a slightly acidic to neutral pH. Good drainage is essential to prevent root rot, and the soil should be rich in organic matter to support the tree's nutrient needs.Fertilizer
A balanced fertilizer with an N-P-K ratio of 10-10-10 is recommended. Fertilize the tree in early spring and again in late summer to support its growth and nut production.Repotting
Repotting is not applicable for Juglans regia as it is a large tree typically grown outdoors. Ensure the planting site has ample space for the tree to grow to its full size.Propagation
Propagation of Juglans regia can be done through seeds or grafting. Seeds should be stratified before planting, and grafting is usually done in late winter or early spring to ensure successful growth.Pruning
Pruning is necessary to maintain the tree's shape and health. Prune in late winter or early spring before new growth begins. Remove any dead, diseased, or crossing branches to promote good air circulation and light penetration.Toxicity
Juglans regia is toxic to pets and humans if ingested. The leaves, nuts, and bark contain juglone, which can cause gastrointestinal distress and other symptoms. Exercise caution and keep pets and children away from the tree.Additional
Juglans regia is valued not only for its nuts but also for its high-quality wood, which is used in furniture and veneer production. The tree can live for several decades, providing shade and aesthetic value to landscapes.REVOLUTIONIZE YOUR PLANT CARE
Make Every Plant Smart
Plant Monitor
STAYS IN YOUR PLANT
Accurately measures the core metrics of your plant – soil moisture, light, temperature and humidity - as well as compound metrics such as Vapor Pressure Deficit (VPD) and Growing Degree Days (GDD).
Shop Now
