The mixed crops of plants with a walnut (Juglans regia L.) during 20 years revealed 5 groups of plants depending on their sensitivity to its neighbourhood (allelopathia). The group with superhigh sensitivity included 9 kinds, with high sensitivity — 18 kinds, moderate — 22 kinds, weak — 13 kinds, tolerant — only 5 kinds.
The received data enable to frame agrophytocenosіs with a walnut (laminated vegetative integument) at the maximal efficiency and minimal expenses for cultivation of medicinal, economic and decorative plants.