Repotting after Jacaranda seedlings have grown

Hello, these are my two little Jacaranda trees that have sprouted from seeds from an amazon kit. I don't know what to do from here. Should I separate and put in two different pots with bonsai fertilizer? Any help would be great. I want to keep them alive. They sprouted being out on my porch in Denver, Colorado. Thank you.

Just let them grow for two or three years, and there's no such thing as "bonsai fertilizer". I wouldn't worry about feeding them for now.

I would not fertilize or repot any seedling the first year.

Thank you. I guess I meant the rocks from Japan that they mix with the soil! Thank you again. I will leave them alone. Do you think I will need a grow light in the winter in Colorado?

Thank you for your response.