I am very, very new to gardening. I'm growing some veggies from seeds. Roots look good, plants are small but are growing, and they all have their first leaves. When should I transplant them into something bigger? They are tomato plants. I started them in small plastic cups with holes in the bottom. Also, none of my hot pepper seeds grew. . . any suggestions? I kept all my seeds moist and in the dark until they germinated, but nothing came of the hot peppers, so I moved them to the light. . . still nothing. It's been 2 weeks.