Image to followAI-generated illustrationJuglans regia
Juglans regia
FamilyGenus: Juglansnative in Germany
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27
Species
interact
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35
Interactions
documented
🐛
8
Host relationships
Species
About this species
Juglans regia is a deciduous, broad-leaved tree that reaches around 20 metres in height. In Great Britain it is an introduced, established species. It flowers in June and prefers semi-shaded sites with fresh, nutrient-rich, calcareous soil.
Ecological network
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PollinationLarval hostFlower visit
Ecological significance
In Great Britain, Juglans regia is an introduced, established tree. The dataset contains no records of adverse ecological impact.
Annual cycle
In spring, new leaves unfold; flowering occurs in June. Fruits develop through summer. The foliage turns colour and drops in autumn, and the tree remains leafless over winter.
Standort & Merkmale
Light
Halbschatten
Moisture
Frisch (Mäßig feucht)
Soil
Starkzehrer (Nährstoffreicher/Fetter Boden)
Flowering period
Jun – Jun
Soil reaction
Basisch / Kalkhold
Bioregion
Continental
Growth form
Baum
Woodiness
Verholzt
Leaf type
Breitblättrig
Leaf phenology
Laubabwerfend
Plant height
19.624 m
Morphological traits: TRY ID3 (CC BY 3.0) & TRY ID81 (CC BY)
Pflege & Anbau
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Light: Semi-shade – a position that avoids full, all-day sun.
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Moisture: Maintain fresh, moderately moist soil.
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Soil: Use nutrient-rich, calcareous or alkaline soil.
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Disturbance: Once established, the tree tolerates low disturbance.
Scientific profile
Juglans regia is a woody, deciduous tree with broad leaves, growing to approximately 19.6 metres tall. The species is introduced and established in Great Britain, not native. Flowering takes place in June. It is adapted to semi-shaded conditions and requires fresh, moderately moist soil. The tree shows a strong preference for calcareous or basic soils and nutrient-rich ground, thriving with low levels of disturbance. The large, heavy seeds have a diaspore mass of around 8.5 grams.
Pollinators & visitors
4 Arten interagieren mit dieser Pflanze
Philaeus chrysopsColumba palumbusDendrocopos majorSturnus vulgaris
Host relationships
8 species use this plant as a host
Stauropus fagiAglia tauThaumetopoea processioneaLymantria disparCossus cossusCalliteara pudibundaHarmonia axyridisPlodia interpunctella
Other flower visitors
15 other species visit the flowers
Dendrocopos syriacusPsittacula krameriCallosciurus erythraeusAceria erineaHippodamia variegataOenopia conglobataCorvus coroneGlis glisCalvia quatuordecimguttataPhyllobius pyriCoccinella septempunctataSciurus vulgarisSciurus carolinensisNyctalus noctulaXyleborinus saxesenii
Sources & data origin
•Interaktionsdaten via GloBI (CC-BY 4.0)
•Cook et al. (2025) UK Butterfly & Moth Traits (DOI: 10.5285/dbc7cc17-cbbd-49dd-bab4-8e8855768d66)
•pollinator_interactions
•Baden-Böhm F, App M, Thiele J (2022) — The FloRes Database: A floral resources trait database for pollinator habitat-assessment generated by a multistep workflow. Johann Heinrich von Thünen-Institut, Dryad, DOI: 10.5061/dryad.djh9w0w29 (CC0)
•FloraWeb / BfN
•EIVE 1.0 — Dengler et al. (2023), DOI: 10.3897/VCS.98324 (CC BY 4.0)
•GBIF Backbone Taxonomy — GBIF Secretariat (2024), DOI: 10.15468/39omei (CC BY 4.0)
•TRY Categorical Traits (ID3) — Kattge et al. (2012), DOI: 10.17871/TRY.3 (CC BY 3.0)
•TRY Global Spectrum (ID81) — Díaz et al. (2016/2021), DOI: 10.17871/TRY.81 (CC BY)
•Checklist Alien Plants Belgium — Verloove F (2023), Botanic Garden Meise (CC BY 4.0)
•Govaerts R et al. (2025) — World Checklist of Vascular Plants (WCVP) v14. Royal Botanic Gardens, Kew. DOI: 10.34885/xs7h-ze42 (CC BY 4.0)
All data is licensed under CC BY 4.0, CC0, or compatible terms. Attribution according to license conditions. Full source overview →