Harvesting heads of lettuce is a great way to save money and ensure the main ingredient in your salads is healthy and free of pesticides and diseases. Learning how to harvest lettuce isn’t complicated; however, a time table must be followed to ensure that you know how to pick lettuce correctly.
When to Harvest Lettuce
Harvesting heads of lettuce successfully depends in large part on planting at the proper time for your location. Lettuce is a cool season crop that cannot handle extreme heat, so picking lettuce heads is most successful before temperatures skyrocket in summer.
The variety planted will somewhat determine when to harvest lettuce, as will the season of planting. Generally about 65 days after planting is when to harvest lettuce planted in the fall, while harvesting heads of lettuce from a winter planted crop will take about 100 days. Some varieties are adaptable and when to harvest lettuce varies by as much as seven days before or after the designated time.
Temperatures during the growing season determine the right time for harvesting heads of lettuce. Lettuce grows best when soil temperatures are cool. Seeds often sprout in only two to eight days if soil temperatures are between 55 and 75 F. (13-24 C). Seeds can be started indoors and planted into the garden in three weeks. This method can be used three weeks before your average frost date if planting in winter. Fall planted lettuce should include frost tolerant varieties which give some leeway in when to harvest lettuce.
Harvesting heads of lettuce is done by cutting them away from the stalk when the head is still firm. Use a sharp knife and simply make a clean cut below the head through the stem. The outer leaves may be removed if needed. Morning is the best time for the harvest as heads will be at their freshest.
Learning how to pick lettuce using these guidelines allows the vegetable to be harvested at the peak of freshness. Fresh, homegrown lettuce may be washed with cool water and refrigerated after excess water is shaken off. A second washing before use may be needed.