When planting, use potting soil. Outdoor garden soil compacts easily, thus inhibiting root growth. Gravel can be placed in the bottom, but it is NOT a substitute for drainage holes. Indoor plants should receive more nutrients and water than their outdoor counterparts. In the confinement of a container, competition is fierce.
Light is critical to growth.
A south-facing window is best. Fruiting plants in particular require at least twelve hours of bright light, which may be difficult to obtain in Michigan winters. Annuals are more specific in their light requirements. Short day plants flower when there is only 10 to 12 hours of light and will not flower with excess light. Long day plants require at least 14, and preferably 18, hours of light to flower.