The classification of rapeseed into winter and spring forms is based on the plant's vernalization requirements and the length of the growing cycle. The winter type requires exposure to low temperatures to trigger flowering, whereas the spring type completes its full life cycle in a single season.
In the reference
41
varieties
crop Rapeseed,
where this is mentioned in the description.
Winter rapeseed (biennis) is characterized by the need to undergo a vernalization stage for the formation of reproductive organs. In the autumn, plants form a basal rosette, and in the spring, they progress to stem elongation. The growing period of this form is 250–265 days, which requires sufficient frost resistance for overwintering at temperatures down to -10 °C.
Spring rapeseed (annua) does not require low temperatures for flowering induction and completes its development cycle in 90–110 days, allowing it to be cultivated in various climatic zones. Despite the absence of significant morphological differences, winter forms possess higher yield potential and more intensive nutrient uptake during early development.
Varieties of Rapeseed 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.