Iride
TerminatedLactuca sativa L. · Lettuce
Seminis Vegetable Seeds
NL
4 records
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.
Sinisa
ActiveLactuca sativa L. · Lettuce
Enza Zaden Beheer B.V.
NL
3 records
Estiva di Kagran 3
ActiveLactuca sativa L. · Lettuce
MINISTERO DELLE POLITICHE AGRICOLE E FORESTALI - DIREZIONE GENERALE DELLE POLITICHE AGRICOLE ED AGROINDUSTRIALI NAZIONALI
IT
2 records
Gotham
ActiveLactuca sativa L. · Lettuce
Gautier Semences SAS (FR)
FR
2 records
Labiba
ActiveLactuca sativa L. · Lettuce
Enza Zaden Beheer B.V.
NL
4 records
Imagination
TerminatedLactuca sativa L. · Lettuce
Rijk Zwaan Zaadteelt en Zaadhandel BV (NL)
FR
3 records
Grosse blonde d'hiver
ActiveLactuca sativa L. · Lettuce
Domaine Public (FR)
FR
2 records
Riviera
TerminatedLactuca sativa L. · Lettuce
Rijk Zwaan Zaadteelt en Zaadhandel BV (NL)
FR
NL
2 records
Grosse blonde paresseuse
ActiveLactuca sativa L. · Lettuce
Domaine Public (FR)
FR
2 records
Jarlsberg
WithdrawnLactuca sativa L. · Lettuce
Enza Zaden Beheer B.V.
NL
3 records
Vittaly
ActiveLactuca sativa L. · Lettuce
ReinSaat KG
AT
2 records
Cardanas
ActiveLactuca sativa L. · Lettuce
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
NL
3 records
Rubygo 2
ActiveLactuca sativa L. · Lettuce
Gautier Semences SAS (FR)
FR
2 records
Exenture
ActiveLactuca sativa L. · Lettuce
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
NL
4 records
Tiktial
ActiveLactuca sativa L. · Lettuce
Syngenta Crop Protection AG
NL
4 records
Eztoril
TerminatedLactuca sativa L. · Lettuce
Enza Zaden Beheer B.V.
NL
4 records
Pomery
ActiveLactuca sativa L. · Lettuce
Gautier Semences SAS (FR)
FR
2 records
Annelie
TerminatedLactuca sativa L. · Lettuce
Novartis Seeds B.V.
NL
3 records
Bionda Colosseo 4
ActiveLactuca sativa L. · Lettuce
MINISTERO DELLE POLITICHE AGRICOLE E FORESTALI - DIREZIONE GENERALE DELLE POLITICHE AGRICOLE ED AGROINDUSTRIALI NAZIONALI
IT
2 records
Stratous
Application submittedLactuca sativa L. · Lettuce
Nunhems B.V.
NL
2 records
Pasquier
ActiveLactuca sativa L. · Lettuce
Domaine Public (FR)
FR
2 records
NuansaÏ
ActiveLactuca sativa L. · Lettuce
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
NL
5 records
Agrela
ActiveLactuca sativa L. · Lettuce
Enza Zaden Beheer B.V.
NL
4 records
Albanice
TerminatedLactuca sativa L. · Lettuce
Gautier Semences SAS (FR)
FR
2 records