Lettuce is a healthy leaf vegetable that can be eaten every day. If you sow a row of lettuces every three weeks, you can harvest fresh crops all summer long. Bakker Spalding Garden Company has many varieties on offer. They are very easy to grow and will also thrive on the patio or decking. Of course, if you have a greenhouse this will prolong the growing season considerably. Choose from Bakker Spalding’s extensive range and enjoy lettuce throughout the season.