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[Lactuca sativa var. longifolia] Roma Romaserra lettuce seeds, romaine type selected for greenhouse growing, crisp elongated head.
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Roma Romaserra lettuce is a romaine variety selected for protected greenhouse growing: an elongated head, crisp firm leaves, suited to out-of-season production.
A Lactuca sativa var. longifolia variety, romaine type: forms an elongated, semi-upright head with thick, crisp leaves, pronounced veining and intense green colour.
Sow in protected seedbed year-round, with staggered transplanting every 3-4 weeks to ensure continuous greenhouse production.
Selected for protected cultivation, it tolerates cold winter greenhouse temperatures well; needs regular watering and good ventilation to prevent fungal diseases.
Greenhouse cultivation allows staggered harvests year-round; the growing cycle varies from 60 to 90 days depending on the season and indoor temperatures.
The protected environment, if not well ventilated, can favour grey mould and downy mildew; also watch for aphids, which find favourable conditions in the colder greenhouse months.
The name "romaserra" points to its intended use: a romaine bred specifically for protected production, widely grown by professional producers.
Like other romaine lettuces, it's rich in vitamin A, vitamin K and folate, with higher fibre content than round-head lettuces.
About 17 kcal per 100 g, with good fibre and potassium content, typical of elongated-leaf romaine lettuces.