Variety traits

Maturity group — head lettuce

Lactuca sativa L. var. capitata L.

Classification characteristic of head lettuce that determines the period from emergence to technical maturity of the head. Varieties are divided into early-maturing (40–50 days), mid-maturing (50–70 days), and late-maturing (70–90 days).

In the reference 10 varieties crop Head lettuce, where this is mentioned in the description.

The maturity group of head lettuce is determined by the number of days from emergence to the onset of technical maturity, when the head reaches marketable density. The readiness for harvest is assessed through visual and tactile evaluation of head firmness.

The classification includes three main categories: early-maturing varieties ripen in 40–50 days, mid-maturing in 50–70 days, and late-maturing in 70–90 days. Specific crop formation timelines depend on the region, cultivation method, and weather conditions.

The choice of maturity group influences agronomic practices and the organization of continuous production. Early-maturing varieties are prone to rapid bolting under long daylight conditions, therefore requiring early sowing dates or cultivation in protected ground. To accelerate the ripening of early varieties, seedling methods and covering materials are frequently used.

General information about the subject — on the page Maturity group.

Sources8

Varieties of Head 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.