Cultivation
Lactuca sativa L.
Lettuce is characterized by a shallow root system, which requires constant moisture in the topsoil layer while maintaining strict humidity control of the aerial parts to prevent rot.
In the reference 44 varieties crop Lettuce, where this is mentioned in the description.
Lettuce has a shallow root system concentrated in the upper horizon, which determines the need for frequent, light irrigation. When growing heading varieties, the irrigation intensity is reduced 2–3 weeks before harvest to ensure the formation of a firm head.
Due to the plant's high susceptibility to fungal diseases under excessive moisture conditions, drip irrigation is preferred as it delivers water directly to the roots. In hydroponic systems, controlling the pH in the range of 5.5–6.4 and maintaining optimal electrical conductivity of the solution is critical.
Excessive salinity in irrigation water negatively affects the biometric parameters of the crop. A mandatory requirement for soil cultivation is thorough land leveling, as water stagnation and poor drainage trigger the development of rot.
General information about the subject — on the page Irrigation.
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.
Lactuca sativa L. · Lettuce
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
Lactuca sativa L. · Lettuce
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
Lactuca sativa L. · Lettuce
Enza Zaden Beheer B.V.
Lactuca sativa L. · Lettuce
Zeleni hit (SI)
Lactuca sativa L. · Lettuce
VENTURA/AZOULAY/NETZER
Lactuca sativa L. · Lettuce
Vilmorin-Mikado S.A.S.
Lactuca sativa L. · Lettuce
Lactuca sativa L. · Lettuce
Enza Zaden BV (NL)
Lactuca sativa L. · Lettuce
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
Lactuca sativa L. · Lettuce
MORAVOSEED
Lactuca sativa L. · Lettuce
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
Lactuca sativa L. · Lettuce
Sativa coop (IT)
Lactuca sativa L. · Lettuce
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
Lactuca sativa L. · Lettuce
Clause Tezier, FR
Lactuca sativa L. · Lettuce
Vilmorin-Mikado S.A.S.
Lactuca sativa L. · Lettuce
ENZA ZADEN
Lactuca sativa L. · Lettuce
Nunhems Netherlands BV
Lactuca sativa L. · Lettuce
Clause Semences SA (FR)
Lactuca sativa L. · Lettuce
TAKII EUROPE B V
Lactuca sativa L. · Lettuce
Agronomski fakultet Sveučilišta u Zagrebu, Zavod za povrćarstvo (HR)
Lactuca sativa L. · Lettuce
AUSTROSAAT Österr. Samenzucht- und Handels-AG
Lactuca sativa L. · Lettuce
ROCALBA, S.A.
Lactuca sativa L. · Lettuce
Domaine Public (FR)
Lactuca sativa L. · Lettuce
Gautier Semences SAS (FR)