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[Lactuca sativa var. longifolia] Mortarella di Primavera romaine lettuce seeds, black seed, elongated closed head, dark green leaves.
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A historic short romaine lettuce variety, Mortarella di Primavera is known for its black seed and elongated, voluminous, medium-closed head, with dark green leaves and a light green heart.
It belongs to the species Lactuca sativa var. longifolia, family Asteraceae. An intermediate type between romaine and butterhead, with dark green outer leaves and a heart trending towards light green, with thick white ribs.
Sow and transplant from March to April for a staggered harvest between May and June, with its characteristic black seed and spacing of about 25 cm between plants.
It adapts very well to all soil types, without requiring overly frequent watering; it shows fair resistance to bolting in spring cultivation.
The medium-sized, compact, tightly closed head is harvested once it reaches the right firmness; it also copes well with moderate periods of drought.
Like other romaine lettuces it can be affected by downy mildew and grey mould in humid conditions; aphids and slugs are the most common pests to monitor.
Well known on the market, prized in home gardens for its excellent flavour and texture; ideal for fresh spring salads with a delicate taste.
Like other romaine lettuces it is rich in beta-carotene, vitamin A and folic acid, as well as fibre, potassium and vitamin C, with a very low calorie content.
Per 100 grams, Mortarella di Primavera romaine lettuce provides about 17 kcal, 1.4 g protein, 2.4 g carbohydrates, 0.2 g fat and 1.7 g fibre. Good source of vitamin A and folate.