Our “little gem” lettuce seeds are planted and our system is up and running!
We created our system to function on ebb and flow during germination and then we will change over to the nutrient film technique once the sprouts are large enough. The ebb and flow system consists of a lower reservoir to hold the water and nutrients, a drain and overflow pipe, a pump to fill up PVC pipe, and 3 cups to hold the rock wool and seedlings. Once the seeds germinate, we will change the incline of the PVC pipe and start the nutrient film technique.
To keep the plants healthy, we are using the liquid plant food; it contains almost all of the recommended values of nutrients for lettuce we researched. Our pH is a little high at this time, but we are carefully monitoring and slowly lowering it to a range of 5.5 to 5.8 to best suit the lettuce. The lighting is set on a timer, providing an “outdoors” timeframe for their light exposure with the fluroescent lamps.