Merveille des Quatre Saisons Lettuce

Saqueta Individual

€1,50

A batavia lettuce of rare elegance, with green leaves tipped by reddish points that bring colour and flavour to the garden and the table.

About the variety. Forms loose, medium-sized heads weighing between 200 and 250 g, very aromatic and flavourful. Suitable for container growing and pairs well with carrot, onion, tomato, cucumber, beetroot and thyme.

€1,50

Itinerário técnico

Como cultivar merveille des quatre saisons lettuce?

Um guia de cultivo passo a passo, da sementeira à colheita.

pH ideal 5.5 and 7Temperatura ideal 20 and 30°C

Sementeira

Started in a seed tray, with seedlings to be transplanted to their final location 3 to 4 weeks later. The crop can be grown in rows, with 15 to 20 cm between plants and 45 to 60 cm between rows.

Solo

It is a crop that adapts well to different soil types, though it is essential that they have good drainage capacity. Soil pH should be between 5.5 and 7.

Clima

The crop prefers temperatures between 20 and 30°C; however, temperatures should not be extreme, as they will lead to premature bolting.

Fertilização

Compost should be incorporated into the base fertilization to meet the crop's nutritional needs. It is important that the soil has adequate phosphorus at the start of development; if sufficient levels are not present in the soil or achieved through compost incorporation, a mineral fertilizer rich in this nutrient should be added.

Rega

Watering should be done regularly, as the root system is not very deep. Drip irrigation is a great option for lettuce cultivation, as it prevents excessive moisture on the leaves and thus the onset of diseases.

Controlo de Infestantes

Mulching is an interesting option for lettuce cultivation, reducing competition between weeds and the crop.

Controlo de Pragas

Mites, aphids, leaf miners and root-knot nematodes are pests of this crop. Mites can be controlled through biological control with predatory mites and, if necessary, by applying azadirachtin or sulphur powder (if T < 28°C). Aphids can be managed through moderate fertilisation without excess nitrogen, natural limitation using border hedgerows to encourage beneficial insects, biological control with parasitoid and predatory hymenoptera and, if necessary, potassium soap or azadirachtin. Leaf miners can be controlled through natural limitation with hedgerows and other vegetation including nectar-bearing plants to feed adult parasitoids, biological control with parasitoid hymenoptera and, as a complementary measure, the application of azadirachtin. Root-knot nematodes are controlled through crop rotation, biofumigation and soil solarisation.

Doenças

Alternaria blight, Sclerotinia, downy mildew and grey mould are diseases affecting this crop. To control Alternaria blight, wide plant spacing and copper-based fungicides (such as Bordeaux mixture) should be used. To control Sclerotinia, appropriate crop rotations and wider spacing should be implemented, and infected plants should be removed from the ground as early as possible. Downy mildew can be controlled through crop rotations of at least 3 years, avoiding excess soil moisture and air humidity, using wide spacing and, if necessary, applying copper hydroxide at low concentrations (which should be lower the colder the weather, as it may risk scorching the leaves). Finally, grey mould should be controlled by removing diseased plant debris, avoiding excessive vigour, preventing water from settling on plants, and through regular application of bentonite clay.