Some folks have fancy grow-light systems for their seedlings. I usually just use the window, but it means the seedlings get quite leggy. This year, I'm trying a grow-light. I didn't have a stand for it, so I stacked some classics on each side. I'll add more classics to raise the lights as the plants grow. Some plants have their first true leaves, so I will re-pot them into a garden mix this week. They were started in sterile soil, and once the plants start to grow, they need nutrients from different soil, and a little bit of weak fertilizer.