By planting small plots in successive weeks beginning in late March, harvest may be extended well into summer. A steady supply of moisture and nutrients is needed for good growth. Root systems of most greens are limited. Keeping the upper six inches of soil moist, but not soggy allows growth to continue unchecked, a critical factor in maintaining sweet flavor. Apply two pounds of nitrogen and one pound of phosphorus per 1,000 square feet before planting to ensure adequate fertility.
Salad greens adapt well to wide row gardening.
Space plants 6 to 12 inches apart in all directions to maximize productivity from small plots. Lettuce is by far the most popular salad vegetable. The crisp head types found in the grocery store require a longer growing season, and lack the nutrition and flavor of leaf and loose head lettuces. Leaf types which performed well in variety trials at Colorado State University include 'Red Sails', 'Royal Oakleaf', and 'Selma-Lollo'. Best loose head types in the trials were 'Cindy', 'Nancy', 'Rosalita', 'Sangria', 'Buttercrunch' and 'Victoria'.