If the lettuce flowers, it may render the leaves inedible. Read on for tips from horticulturists about how to harvest both loose-leaf and full heads of lettuce. Related: How to Grow Lettuce for ...

Keep in mind that darker red leaf varieties won’t maintain ... anywhere from five to six weeks—to develop. To harvest the ...

Harvest leaves from cut-and-come again ... Butterhead', there are many others to try, including loose-leaf types and oak leaf lettuce, radicchio, rocket and endive.