Variety traits
Juglans regia L.
A trait characterizing the tree's development energy, canopy formation, and annual growth increment. It determines planting density and the balance between vegetative growth and fruiting in walnuts.
In the reference 59 varieties crop Persian walnut, where this is mentioned in the description.
To assess walnut vigor, biometric indicators are used, such as tree height and trunk diameter at 20 years of age, as well as the length of annual shoots in the nursery. Varieties are classified as vigorous (>10–11 m), semi-vigorous (5–9 m), and low-vigor, the latter being most in demand for intensive orchards.
This trait directly influences cultivation technology: vigorous forms require wider spacing to ensure proper light exposure. Excessive vigor often negatively impacts yield and cold hardiness due to delayed shoot lignification; therefore, moderate growth is preferred for mechanized harvesting.
General information about the subject — on the page Vigor.
Selection based on the description text, not on official evaluation: these data are absent from registers. For specific variety details, please refer to its profile.
Juglans regia L. · Persian walnut
Etablissement Linard (FR)/Comite Interprofessionnel du Bas Limousin (FR)/Centre Technique Interprofessionnel des Fruits & Legumes (FR)/Comite Interprof. Noix, Noyer, Chataignier du Quercy (FR)
Juglans regia L. · Persian walnut
A. Zhivondov, N. Nedev, I. Yovchev, M. Ivanova
Juglans regia L. · Persian walnut
N. Nedev, L. Kavardzhikov, M. Ivanova
Juglans regia L. · Persian walnut
TSURKAN IVAN
Juglans regia L. · Persian walnut
INSTITUT NATIONAL DE LA RECHERCHE AGRONOMIQUE, FR
Juglans regia L. · Persian walnut
Information not available - Contact NL authorities
Juglans regia L. · Persian walnut
Station d'Experimentation nucicole Rhone-Alpes (FR)/Institut National de la Recherche Agronomique (FR)/Station experimentale de Creysse (FR)
Juglans regia L. · Persian walnut
Station d'Experimentation nucicole Rhone-Alpes (FR)/Institut National de la Recherche Agronomique (FR)/Station experimentale de Creysse (FR)
Juglans regia L. · Persian walnut
Gospodarstwo Ogrodnicze, Szkółkarstwo Ludmiła Dudek-Wieczorek
Juglans regia L. · Persian walnut
Juglans regia L. · Persian walnut
Juglans regia L. · Persian walnut
Juglans regia L. · Persian walnut
Juglans regia L. · Persian walnut
Juglans regia L. · Persian walnut
Juglans regia L. · Persian walnut
Juglans regia L. · Persian walnut
Juglans regia L. · Persian walnut
Juglans regia L. · Persian walnut
Juglans regia L. · Persian walnut
Juglans regia L. · Persian walnut
Juglans regia L. · Persian walnut
Juglans regia L. · Persian walnut
Juglans regia L. · Persian walnut