|Harvest:||May to September|
|Good Companion:||Beetroot, cabbage, clover, pea, radish|
Dark green crunchy heads. Cos lettuce is an upright type, with long hearts of crisp leaves
Cultivation: Grow in any reasonable moderately fertile soil.
Pests and Diseases: Leatherjackets, slugs and snails, leaf aphids, root aphids, downy mildew, grey mould, tip burn