This is my first attempt to grow a root vegetable using hydroponics. It will be interesting to see what happens. Will there be enough room inside the 2-inch net-pots for the radish to develop, or are larger net-pots required? 2 different types of media will be tested: rockwool and perlite.
Jan 3, 2016 = Day 0. Plants started from seed (Botanical Interests). Seeds sowed in 1.5-inch rockwool cubes or perlite in 2-inch net-pots. In the case of perlite, a thin slice (1/4-inch) of rockwool was placed at the bottom of the net-pot to help keep the perlite from falling out. Moistened with dilute fertilizer solution: 1 mL (1/5 tsp) Dyna-Gro Liquid Grow per gallon of tap water. Nutrient concentrations (in ppm): N 18, P 24, K 13, Ca 5, Mg 1, S 0.13, Fe 0.26, Mn 0.13, B 0.05, Zn 0.13, Cu 0.13, Mo 0.002, Ni 0.0003, Co 0.004. pH = 7.0.
Jan 5, 2016 = Day 2. Plants germinated, placed directly under a fluorescent light (2 ft. T8 bulb, 17W, 6500k) for 14-16 hours per day.
Jan 8, 2016 = Day 5. Installed plants into small rectangular 1.5-gallon container. Hydroponic solution composed of 1.125 gal (18 cups) tap water, 6.75 mL Dyna-Gro Liquid Grow, 0.225 mL Dyna-Gro Pro-TeKt. Nutrient concentrations (in ppm): N 111, P 143, K 81, Ca 32, Mg 8, S 0.8, Fe 1.6, Mn 0.8, B 0.3, Zn 0.8, Cu 0.8, Mo 0.01, Ni 0.002, Co 0.024, Si 4. pH = 6.5.
Jan 20, 2016 = Day 17. Thinned to 1 plant per net-pot. Transferred plants to indoor grow room, where they get 8 hours LED light per day, plus 2 hours of sunlight.
Feb 9, 2016 = Day 37. Harvested all 4 radishes. The radishes grown in rockwool were bigger than the ones grown in perlite. Almost all of the hydroponic fluid was gone at this point.