 Typically only short-statured crops such as leafy greens and herbs are grown commercially in deep water culture as rafts move through the pond and taller plants (such as tomatoes or cucumbers) would necessitate being trellised.The most common commercial deep water culture crop is lettuce.Lettuce does best in a pH of 5.6-6.0, EC of 1.1-1.2 (of fertilizer), 17 mol·m-2·d-1 daily light integral which may consist of a combination of natural and supplemental lighting, air temperature of 24 °C day/19 °C night, water temperature of 25 °C, and dissolved oxygen of 7 mg·L-3.