Cultivation
Brassica oleracea L. (White Cabbage Group)
For white cabbage, protected ground is used primarily as a technology for seedling production to gain a head start in the growing season, rather than for producing a marketable crop.
In the reference 70 varieties crop White cabbage, where this is mentioned in the description.
The use of protected ground for this crop is aimed at reducing the field growth period by 20–30 days and protecting young plants from pests, such as the cruciferous flea beetle, and late spring frosts. Commercial cultivation of cabbage from seed to head in protected ground is economically inefficient due to the crop's biological requirement for low temperatures and intensive ventilation.
The technology for growing seedlings in greenhouses requires a specific temperature regime: after emergence, the temperature is lowered to 8–10°C for hardening, and active ventilation is carried out before transplanting. Tray technology is preferred, as it prevents root system damage and ensures the production of high-quality planting material.
General information about the subject — on the page Protected cultivation.
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.
Brassica oleracea L. (White Cabbage Group) · White cabbage
Wing Seed
Brassica oleracea L. (White Cabbage Group) · White cabbage
Bejo Zaden B.V.
Brassica oleracea L. (White Cabbage Group) · White cabbage
HM.CLAUSE
Brassica oleracea L. (White Cabbage Group) · White cabbage
Ger Beemsterboer
Brassica oleracea L. (White Cabbage Group) · White cabbage
Paul Degreef
Brassica oleracea L. (White Cabbage Group) · White cabbage
Bejo Zaden BV (NL)
Brassica oleracea L. (White Cabbage Group) · White cabbage
RIJK ZWAAN SAMENCHUHT UND SAMENHANOLLUNG GmbH, DE
Brassica oleracea L. (White Cabbage Group) · White cabbage
RIJK ZWAAN ZAADTEELT EN ZAADHANDEL B.V.
Brassica oleracea L. (White Cabbage Group) · White cabbage
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
Brassica oleracea L. (White Cabbage Group) · White cabbage
NICKERSON-ZWAAN B.V., NL
Brassica oleracea L. (White Cabbage Group) · White cabbage
Kees Reinink
Brassica oleracea L. (White Cabbage Group) · White cabbage
HM.CLAUSE
Brassica oleracea L. (White Cabbage Group) · White cabbage
Ger Beemsterboer
Brassica oleracea L. (White Cabbage Group) · White cabbage
Zsolt Galli
Brassica oleracea L. (White Cabbage Group) · White cabbage
RIJK ZWAAN ZAADTEELT EN ZAADHANDEL BV, NL
Brassica oleracea L. (White Cabbage Group) · White cabbage
HAZERA SEEDS B.V.
Brassica oleracea L. (White Cabbage Group) · White cabbage
TAKII EUROPE B V
Brassica oleracea L. (White Cabbage Group) · White cabbage
Jiri Horal
Brassica oleracea L. (White Cabbage Group) · White cabbage
Ger Beemsterboer
Brassica oleracea L. (White Cabbage Group) · White cabbage
BEJO ZADEN B.V.
Brassica oleracea L. (White Cabbage Group) · White cabbage
Pierre Hurier
Brassica oleracea L. (White Cabbage Group) · White cabbage
Kees Reinink
Brassica oleracea L. (White Cabbage Group) · White cabbage
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
Brassica oleracea L. (White Cabbage Group) · White cabbage
Bejo Zaden B.V.