The set up is in a room in my house that’s kept at 68 degrees so it should be constant. I start the seeds in rockwool cubes and transfer the cubes to the little baskets with the blue sponge circle on the bottom.
I’m using General Hydroponics MaxiGro 10-5-14 for food. 1.5 tsp per gallon. I could try cutting it back to 1 tsp per gallon and see if it helps.
But I think all of these factors were the same in the first batch that went really well.