Sowing corn salad direct is easiest, but may be a problem in soil with lots of weed seeds. Sowing two or three seeds, thinned to one plant, in modules for planting out is also possible. However, corn salad is slow to establish after planting and is one of the few vegetables it's preferable to sow. Roots are shallow, so if the weather's very dry, frequent, gentle watering is required. Sow in late August; harvest from November.