Apart from traditional lettuces, such as 'Cos', 'Iceberg' and 'Butterhead', there are many others to try, including loose-leaf types and oak leaf lettuce, radicchio, rocket and endive.

Pour in the dressing and toss well. Place half the cucumber and half the mixed leaves, Romaine lettuce and rocket in the bowl. Season, then top with the remaining cucumber, leaves, Romaine lettuce ...

As the station's commander, she is growing ‘Outredgeous’ romaine lettuce in microgravity, research that promises major benefits for both space missions as well as Earth-based agriculture. The ...