Variety traits
Lactuca sativa L.
The ability of lettuce to germinate and develop at low temperatures, which allows for pre-winter sowing and cultivation in unheated spring greenhouses.
In the reference 19 varieties crop Lettuce, where this is mentioned in the description.
Lettuce seeds are capable of germinating at a temperature of 4–5 °C. Seedlings can withstand short-term temperature drops to –3…–5 °C, while mature plants in the vegetative phase can tolerate frosts down to –5 °C. With further temperature drops to –7…–10 °C, damage to the leaf apparatus occurs, although plants may retain the potential to resume growth.
Varieties that maintain growth and development rates in unheated greenhouses at night temperatures of 3–4 °C and daytime temperatures of 6–7 °C are considered cold-tolerant. The assessment of the trait is based on the biomass accumulation dynamics under stress conditions and the ability to reach market maturity within scheduled timeframes, which is confirmed by the analysis of metabolic markers and genes responsible for adaptation to oxidative stress.
General information about the subject — on the page Cold tolerance.
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
Vilmorin, F
Lactuca sativa L. · Lettuce
Vilmorin-Mikado S.A.S.
Lactuca sativa L. · Lettuce
Semenarna Ljubljana, SI
Lactuca sativa L. · Lettuce
Seminis Vegetable Seeds
Lactuca sativa L. · Lettuce
Enza Zaden Beheer B.V.
Lactuca sativa L. · Lettuce
Seminis Vegetable Seeds
Lactuca sativa L. · Lettuce
Domaine Public (FR)
Lactuca sativa L. · Lettuce
ZETA SEEDS S.L.
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
Domaine Public (FR)
Lactuca sativa L. · Lettuce
Domaine Public (FR)
Lactuca sativa L. · Lettuce
ROCALBA, S.A.
Lactuca sativa L. · Lettuce
Domaine Public (FR)
Lactuca sativa L. · Lettuce
Seminis Vegetable Seeds
Lactuca sativa L. · Lettuce
Vilmorin-Mikado S.A.S.
Lactuca sativa L. · Lettuce
Domaine Public (FR)
Lactuca sativa L. · Lettuce
Domaine Public (FR)
Lactuca sativa L. · Lettuce
Lactuca sativa L. · Lettuce
Lactuca sativa L. · Lettuce
Lactuca sativa L. · Lettuce
Lactuca sativa L. · Lettuce
Domaine Public (FR)
Lactuca sativa L. · Lettuce
Barb Neubert