English Walnut
Juglans regia
- Native to:
- Afghanistan, Iran, Iraq, Lebanon-Syria, North Caucasus, Pakistan, Transcaucasus, Türkiye
AnRo0002
Taxonomy
- Division:
- Magnoliophyta | - Flowering plants
- Family:
- Juglandaceae
- Genus:
- Juglans
- Species:
- Juglans regia
- USDA Symbol:
- JURE80
Growth Characteristics
- Life Cycle:
- Perennial
- Growth Habit:
- Tree
- Height:
- 2500 cm
- Light Requirements:
- Full Sun
- Drought Tolerance:
- Medium
- Bloom Months:
- apr,may
Wildlife Benefits
- Caterpillars:
- ★★★★☆ Recorded caterpillar host plant (HOSTS Database)
Keystone Species Ranking
- Caterpillar Keystone:
- ★★★★★ Butterfly & moth species supported by this genus (NWF)
Host Plant for Caterpillars
Acrobasis stigmella, almond moth (Cadra cautella), American plum borer (Euzophera semifuneralis), Cecropia moth (Hyalophora cecropia), Copper Underwing (Amphipyra pyramidoides), elm spanworm moth (Ennomos subsignaria), Fall webworm (Hyphantria cunea), Forest Tent Caterpillar (Malacosoma disstria), fruit-tree leafroller (Archips argyrospila), Greater Red Dart (Abagrotis alternata), Gretchena concitatricana, Hickory Tussock Moth (Lophocampa caryae), Imperial Moth (Eacles imperialis), Indian meal moth (Plodia interpunctella), Luna moth (Actias luna), navel orangeworm (Amyelois transitella), Newlywed Underwing (Catocala neogama), orange tortrix moth (Argyrotaenia citrana), Penitent Underwing (Catocala piatrix), Prochoerodes forficaria, Red-humped caterpillar moth (Schizura concinna), Regal Moth (Citheronia regalis), Splendid Royal Moth (Citheronia splendens), Stigmella juglandifoliella, Tearful Underwing (Catocala lacrymosa), Variable Oakleaf Caterpillar Moth (Lochmaeus manteo), walnut spanworm moth (Phigalia plumogeraria), Walnut Sphinx (Amorpha juglandis), Western tussock moth (Orgyia vetusta), White-marked Tussock Moth (Orgyia leucostigma), Yellownecked caterpillar (Datana integerrima)
Garden & Ecology Notes
- Wildlife Value:
- squirrels, birds, small mammals
- Deer Resistant:
- Yes
- Fragrant:
- Yes
- Fall Color:
- yellow
Soil Requirements
- Soil Type:
- rich, well-drained loamy soil
- pH:
- 6.0 - 7.5 (slightly acidic to neutral)
- Drainage:
- excellent drainage required
- Moisture:
- consistently moist
- Notes:
- prefers deep soils with good fertility
Propagation & Germination
- Stratification:
- Cold/moist stratification required — 90–120 days
- Germination Time:
- 14–60 days
- Notes:
- Seeds require cold stratification; best sown in fall for natural stratification. Germination can be erratic.
The above propagation data sourced from Claude AI