Cultivation
Allium cepa L. var. cepa
Classification of onion cultivars by planting time, determined by their genetic response to light conditions and winter hardiness. This separation is technological in nature and is aimed at obtaining production during different periods of the season.
In the reference 4 varieties crop Onion, where this is mentioned in the description.
Winter onion cultivars possess specific genetic adaptations to short day length, which allows them to develop when planted in autumn and withstand low winter temperatures. In contrast, spring cultivars planted before winter most often freeze or form flower stalks prematurely, as they undergo vernalization in conditions unsuitable for growth.
The use of winter forms allows for the utilization of soil moisture reserves and the completion of the growing season before the period of active pest proliferation, ensuring an extra-early harvest. The selection of an onion form is based on the photoperiodism of the specific cultivar, as not all types of onions are capable of successful overwintering and full bulb formation under such technological schemes.
General information about the subject — on the page Winter and spring forms.
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.
Allium cepa L. var. cepa · Onion
SHAMROCK SEED COMPANY
Allium cepa L. var. cepa · Onion
Allium cepa L. var. cepa · Onion
Allium cepa L. var. cepa · Onion
Allium cepa L. var. cepa · Onion
Allium cepa L. var. cepa · Onion