Variety traits

Vegetation period — onion

Allium cepa L.

The vegetation period of onion is calculated from mass emergence to the lodging of 75–85% of the leaves. This indicator determines maturity dates, potential yield, bulb storability, and the planning of agrotechnical practices.

In the reference 109 varieties crop Onion, where this is mentioned in the description.

The duration of onion vegetation varies depending on varietal characteristics and growing conditions. Early-maturing varieties complete their development cycle in 93–105 days, while mid-season and mid-late hybrids may require 116 to 135 days for full maturity.

The length of the period directly affects bulb weight: longer growth promotes nutrient accumulation and increased harvest size. However, prolonged vegetation due to excess nitrogen fertilizers hinders neck maturation, which reduces storability. Onion growth rates are significantly influenced by photoperiodism, planting density, and climatic conditions, which determine the intensity of foliage formation and the transition to bulb development.

General information about the subject — on the page Vegetation period.

Sources8

Varieties of Onion mentioned in the description

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.