The starter plants are a couple weeks old. I have been keeping them under a grow light in my kitchen. On the warm days, I take the starters out to the porch greenhouse and then back in at night. These are cauliflower, varieties of cabbage, and collards. I used potting soil mixed with seed starting mix for the starters and keep lights on the plants for over 10 hours. The amount of light varies depending on when I wake up and go to bed because I don't have the lights on a timer.
As I was passing the greenhouse center where I usually get truckloads of mulch, I bought three Early Girl Tomatoes and put them with the starters. I also have cilantro, basil, onions, and carrots growing as well.
Soon I will sew other tomato varieties indoors in recycled water bottles because they're bigger containers than typical starter cells and pots. I tend to start tomatoes and peppers indoors early in March, but I end up regretting starting early because they'll grow better, faster, stronger if I threw out a bunch of seed in the summer instead.
Come April, I'll have greens transplanted outside in the garden and I'll have summer crops started indoors. Tuesday I sewed lettuce varieties indoors along with radish, swiss chard, broccoli, so we'll see their progress in a month, and I'll transplant them outside with the cabbage and cauliflower.