A NURSERY is a place for plants, typically with a variety of different species. It is usually a large area with many different types of plants, often with a staff to help maintain them. A SILL is a shelf or LEDGE that is built into the wall of a building, and is often used to display plants. A LEDGE is a flat surface that projects from a wall, and can also be used to display plants. Finally, a BED is an area of soil that is prepared for planting, and is often used to grow flowers or vegetables.