Red Sails, a reddish loose-leaf variety, has been a dependable lettuce for me in the past. I will be comparing it to a new lettuce, Adriana, a green butterhead variety. Since my 3.5-gallon bucket will hold 3 plants, I will grow 1 Adriana plant and 2 Red Sails.
Dec 2, 2015 = Day 0. Plants started from seed: Adriana (Johnny’s Seeds), Red Sails (Botanical Interests). Moistened with dilute fertilizer: Dyna-Gro Liquid GROW 7-9-5 diluted 1 mL (1/5 tsp) per gallon of tap water. N-P-K (in ppm): 18-10-11. pH = 7.0.
Roots are now visible growing out of the bottom of the rockwool cubes, so it is time to install these plants into a larger 3.5-gallon bucket.
Dec 19, 2015 = Day 17. Plants installed in 3.5-gallon bucket. Hydroponic solution composed of 3.5 gal (13.25 L) tap water, 7 g MasterBlend 4-18-38, 7 g calcium nitrate, 3.5 g magnesium sulfate, 0.7 mL Dyna-Gro Pro-TeKt, 2.8 mL pH Down. N-P-K (in ppm): 103-41-168. pH = 6.5.
I thinned out the plants so that there are now only 2 plants growing out of each net-pot.
Feb 28 = Day 88. The entire Adriana plant has been harvested, only the 2 Red Sails plants remain. The plant stems are getting quite long, but the leaves still taste fine.
Mar 10 = Day 99. Harvested all leaves. Final statistics: 3.2 gallons (12.1 L) of fluid used. Final pH of fluid = 8.0.
Based on my experience, I conclude that Red Sails gives a better yield than the Adriana variety. Both types of lettuce did well, but the Red Sails leaves were bigger and more plentiful than the Adriana.