Growing lettuce ( GYI)
Lettuce There are four main types of lettuce. The first three (butterhead, cos and crisphead) form hearts at their centre and are usually grown as proper heads of lettuce. They take longer to mature. The fourth type (loose-leaf/’cut-and-come-again’) doesn’t form a heart and is therefore generally grown as a ‘cut-and-come-again’ crop, where leaves are cut as required. SOWING Lettuce will do well in any reasonable soil, as long as it’s moisture retentive – add well-rotted manure or compost the previous winter. When growing heads of lettuce, sow one seed per module in a module tray. Lettuce needs light to germinate, so don’t cover the seeds with compost. Lettuce will not germinate in temperatures above 25°C, so if the weather is warm you may need to move the trays into a cool shed for a few days until they germinate. Seedlings are ready to plant out when they have 4 or 5 leaves. Harden off well before transplanting. Use fleece or cloches to protect early sowings from frost. GROWING ...