Cultivation

Spinach in Protected Ground

Spinacia oleracea L.

Growing spinach in protected ground requires strict control of temperature and lighting due to the crop's high sensitivity to bolting when temperatures exceed +18°C and under long-day conditions.

In the reference 66 varieties crop Spinach, where this is mentioned in the description.

The optimal temperature regime for spinach is +10...+13°C during cloudy weather and +15...+18°C on sunny days. Temperatures above +18°C combined with long daylight hours trigger a premature transition of the plant into the generative phase, leading to coarsening of the leaves and loss of marketable quality.

In winter greenhouses, supplemental lighting is a key element of the technology, which allows for increased planting density, with row spacing in cold frames being approximately 6 cm. The soil mixture must be highly fertile, consisting of equal parts humus and sod soil, and to accelerate germination, seeds are soaked for up to one and a half days before sowing.

General information about the subject — on the page Protected cultivation.

Sources8

Varieties of Spinach 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.