almost 5 times a year old field growing lettuce and it's safer to there's no need here for pesticides or fungicides because it's all indoors fertilizer can contaminate the environment by about the 45th day in the summer the 75th day in the winter the lettuces are finally ready for harvesting workers cut off the yellow leaves at the base then either cut off the route sore wrap them around the stem depending on how this crap will be sold then they vacuum cool each lettuce for longer Shelflife.