WINTER DENSITY
ActiveLactuca sativa L. · Lettuce
SEMINIS VEGETABLE SEED IB
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
SEMINIS VEGETABLE SEED IB
Cucumis sativus L. · Cucumber
M. Aleksandrova, A. Mihov
Chrysanthemum x morifolium Ramat. · Florist's daisy
Dirk Pieters
Lactuca sativa L. · Lettuce
Gautier Semences SAS (FR)
Beta vulgaris Leaf Beet Group · Swiss chard
Domaine Public (FR)
Cucumis melo L. · Melon
Monsanto Vegetable IP Management B.V.
Brassica oleracea L. (Kohlrabi Group) · Kohlrabi
TAKII EUROPE B V
Lactuca sativa L. · Lettuce
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
Solanum lycopersicum L. · Tomato
Vilmorin-Mikado S.A.S.
Phaseolus vulgaris L. · Common bean
NUNZA BV
Solanum lycopersicum L. · Tomato
HM Clause Inc (US)
Solanum melongena L. · Eggplant
GENISTA S.R.L.
Cucumis sativus L. · Cucumber
Lactuca sativa L. · Lettuce
Syngenta Crop Protection AG
Capsicum annuum L. · Bell pepper
Tezier SA (FR)
Capsicum annuum L. · Bell pepper
SEMILLAS FITO, S.A.
Solanum melongena L. · Eggplant
MINISTERO DELLE POLITICHE AGRICOLE E FORESTALI - DIREZIONE GENERALE DELLE POLITICHE AGRICOLE ED AGROINDUSTRIALI NAZIONALI
Solanum lycopersicum L. · Tomato
Syngenta Crop Protection AG
Capsicum annuum L. · Bell pepper
PLANTICO HODOWLA I NASIENNICTWO OGRODNICZE ZIELONKI SP. Z O.O.
Cichorium intybus L. (Leaf Chicory Group) · Chicory
Enza Zaden Beheer B.V.
Solanum lycopersicum L. var. lycopersicum · Tomato
SYSINA ELENA ARTEM'EVNA / BARTAJYa VERA VLADIMIROVNA
Solanum lycopersicum L. · Tomato
INSTITUT NATIONAL DE LA RECHERCHE AGRONOMIQUE, FR
Cucumis melo L. · Melon
HM.Clause S.A.S.
Lactuca sativa L. · Lettuce
Harris Moran Seed Company