An unlimited growth cultivation mode was developed for tomato growth using a DFT in a greenhouse setting (Zhang et al., 2002). Healthy tomato seeds were surface sterilized in 0.5% sodium hypochloride solution for 2 min, rinsed with sterile distilled water and then germinated on sterile moist gauze at 30°C in dark for 72 h. The germinated seedlings were sown in a seedling tray in which the holes contained rockwool previously sterilized at 121°C for 20 min. The seedling tray was placed in a nutrient solution sterilized by filtration. After 20 days cultivation in a greenhouse, seedlings as high as 10 cm with four to five leaves were transplanted to a bigger seedling tray in a hydroponic cultivation system. Temperature was kept at 25–28°C in the daytime and 13–16°C at night. Relative humidity was kept at 85%. The nutrient solution was based upon the recipe of Gunes et al. (1998).