Survivors

I started with two seeds of dos si dos 33 barney's farm, they grew and popped the problem is that I put them under the lamp too close 30 cm and burned one of the two and two other seeds of Tropicanna banana. The only survivor is really strong is growing well I put two more in the water to have at least three plants. I made a substrate with gravel earth and earthworm humus. I only gave water to avoid overfertilizing. Then I left the lamp taller than 50 cm