Organic Lettuce 'Sylvesta’ is a butterhead type which forms a good sized head of thick, flavoursome green leaves. Showing resistance to mildew and aphid, sow this variety successively and you can enjoy a reliable outdoor crop from spring through to late summer. The large outer leaves are perfect for sandwiches, while the inner heart is crisp and refreshing providing a good bite in salads. Height: 15cm (6”). Spread: 30cm (12”)