Versaï
ActiveLactuca sativa L. · Lettuce
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
Cultivation
Cultivation in open field conditions requires the selection of varieties adapted to uncontrolled environmental factors and climatic fluctuations. Such varieties are characterized by genetic plasticity, stress tolerance, and a vegetation period consistent with local weather conditions.
Mentioned in descriptions 28 305 varieties reference book.
Varieties for open field cultivation are bred for adaptation to uncontrolled environmental conditions, unlike greenhouse varieties. Their key feature is the ability to provide a stable yield under fluctuations in temperature, humidity, and light intensity, as well as increased resistance to regional disease pressure.
The choice of variety for open field cultivation depends on the phenological characteristics of the plant, where the life cycle must fit within the frost-free period of a specific location. Morphology is an important factor: preference is often given to determinate forms, resistant to wind stress, and the crop's ability to mature uniformly to facilitate harvesting.
Cultivation technology in open field conditions requires taking into account the biological characteristics of the variety, such as the need for insect pollination. Varieties for field conditions possess higher plasticity, which allows them to maintain yield under less intensive care and nutrient management, while greenhouse counterparts often demonstrate reduced productivity and susceptibility to stress under such conditions.
Selection based on the description text, not official resistance ratings: such data is not available in registers. Mention indicates that the trait is discussed in the variety's sources; see the variety's profile for details on what is specifically stated.
Lactuca sativa L. · Lettuce
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
Lactuca sativa L. · Lettuce
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
Alstroemeria L. · Alstroemeria
Konst Alstroemeria BV
Allium cepa L. · Onion
NUNHEMS B.V.
Lactuca sativa L. · Lettuce
Enza Zaden Beheer B.V.
Solanum lycopersicum L. · Tomato
Bejo Zaden BV, NL
Lactuca sativa L. · Lettuce
Syngenta Seeds B.V.
Lactuca sativa L. · Lettuce
Rijk Zwaan, NL
Lactuca sativa L. · Lettuce
NUNHEMS
Solanum melongena L. · Eggplant
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
Capsicum annuum L. · Bell pepper
SEMO A.S., CZ
Cucumis sativus L. · Cucumber
TOKITA SEED CO LTD
Helianthus annuus L. · Sunflower
Revol Benoit
Brassica oleracea L. (Kohlrabi Group) · Kohlrabi
RIJK ZWAAN ZAADTEELT EN ZAADHANDEL B.V.
Lactuca sativa L. · Lettuce
BEJO ZADEN
Lactuca sativa L. · Lettuce
Nunhems B.V.
Solanum lycopersicum L. · Tomato
Seminis Vegetable Seeds
Lactuca sativa L. · Lettuce
Syngenta Crop Protection AG
Lactuca sativa L. · Lettuce
Bejo Zaden, NL
Lactuca sativa L. · Lettuce
Syngenta Crop Protection AG
Phaseolus vulgaris L. · Common bean
Holland-Select Research B.V.
Citrullus lanatus (Thunb.) Matsum. & Nakai · Watermelon
NUNHEMS
Spinacia oleracea L. · Spinach
Seminis Vegetable Seeds
Lactuca sativa L. · Lettuce
Nunhems B.V.