Even if you live in an apartment in the middle of an urban canyon, don’t despair — you can still garden. It just takes a little creativity to find and use windowsills, rooftops, balconies, and community gardens to grow lush vegetables, flowers, and herbs. Containers with holes for good drainage and locations with six hours of sun per day are essential partners in urban gardening. It’s hard to get enough light to grow food crops on an indoor windowsill. Glass provides enough UV protection to keep the light from being strong enough. Grow-lights are a better solution indoors because they provide the right light spectrum plants need to grow.
Source: Better Homes and Gardens