Izza
WithdrawnLactuca sativa L. · Lettuce
Barb Neubert
DE
1 record
Cultivation
Field-grown lettuce
Lactuca sativa L.
Growing lettuce in open fields requires the selection of varieties resistant to bolting under long-day conditions and the management of downy mildew. The crop is characterized by high earliness, which allows for succession planting, and the ability to tolerate frosts down to -2 °C.
In the reference 1 060 varieties crop Lettuce, where this is mentioned in the description.
When cultivating lettuce in open fields, sensitivity to photoperiodism and temperature is a critical factor. Summer varieties must possess bolting resistance, as excessive light and heat trigger premature transition to flowering. The plant's shallow root system requires consistent soil moisture maintenance, and non-woven row covers are often used to protect against heat stress.
Open-field technology involves using lettuce as an intercrop, which is feasible due to its short growing period of 25–40 days. Soil requirements are limited to a pH range of 6.0–6.8, and the quality of seedbed preparation must exclude large clods due to the small size of the seeds. Cold hardiness allows for winter and early spring sowing, while considering the necessity of protection against downy mildew, caused by the pathogen Bremia lactucae.
General information about the subject — on the page Open field.
Varieties of Lettuce 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.
Prometeo
Application submittedLactuca sativa L. · Lettuce
Gautier Semences SAS (FR)
FR
1 record
CARTHAGO
TerminatedLactuca sativa L. · Lettuce
Seminis Vegetable Seeds
ES
1 record
Wigo
WithdrawnLactuca sativa L. · Lettuce
Syngenta Crop Protection AG
NL
2 records
OTILIA
WithdrawnLactuca sativa L. · Lettuce
HAZERA (1939)
ES
1 record
Lactuca sativa L. · Lettuce
Domaine Public (FR)
FR
1 record
Cosima
ActiveLactuca sativa L. · Lettuce
Barb Neubert
DE
2 records
83 06 RZ
WithdrawnLactuca sativa L. · Lettuce
RIJK ZWAAN Z.Z. B.V.
ES
1 record
Multired 7
TerminatedLactuca sativa L. · Lettuce
Nunhems B.V.
NL
2 records
RONALY
ActiveLactuca sativa L. · Lettuce
HAZERA GENETICS
ES
1 record
Hilde i
TerminatedLactuca sativa L. · Lettuce
Station Van Heverlee (BE)
FR
1 record
Freckles
TerminatedLactuca sativa L. · Lettuce
Seeds by Design (US)
FR
1 record
Platine
TerminatedLactuca sativa L. · Lettuce
Tezier SA (FR)
FR
2 records
45-84 RZ
ActiveLactuca sativa L. · Lettuce
RIJK ZWAAN Z.Z. B.V.
ES
1 record
Passion blanche à graine noire
TerminatedLactuca sativa L. · Lettuce
Domaine Public (FR)
FR
1 record
Blonde a bord rouge
TerminatedLactuca sativa L. · Lettuce
Domaine Public (FR)
FR
1 record
MacaÖ
ActiveLactuca sativa L. · Lettuce
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
NL
2 records
KRISHNA
TerminatedLactuca sativa L. · Lettuce
HAZERA (1939)
ES
1 record
Leonor
TerminatedLactuca sativa L. · Lettuce
Gautier Semences SAS (FR)
FR
2 records
Brigit
ActiveLactuca sativa L. · Lettuce
Nunhems B.V.
NL
2 records
AMANDINE RZ (85-90 RZ)
WithdrawnLactuca sativa L. · Lettuce
RIJK ZWAAN Z.Z. B.V.
ES
1 record
Ardenta
ActiveLactuca sativa L. · Lettuce
Gautier Semences SAS (FR)
FR
1 record
Romaine des Melons
ActiveLactuca sativa L. · Lettuce
Domaine Public (FR)
FR
1 record
Passion verte d'hiver
TerminatedLactuca sativa L. · Lettuce
Domaine Public (FR)
FR
1 record