The line where the grass stops and the concrete patio starts is a hard line. Soften that line by using pots.Strategically placing a pot at the edge of the patio changes the contour. Your eye is drawn to the vertical aspect of the pot and the long horizontal line of the patio is interrupted. Tall pots in a corner can add a sense of depth. Use plants of different colors, heights and textures in the pots to add to the variety.
Almost anything can be used as a container, but it must have a drain hole. Standing water at the bottom of a pot will rot the plant's root system. Unusual pots provide visual variety in the garden. Containers can be whimsical like a wagon or a wheelbarrow. It is a matter of personal taste. Some people like using bathtubs or toilets as planters.
Pots can be monochromatic using just one type of plant or using plants one color flower. These types of design can be used to add symmetry to the garden or to introduce a contrasting color to a garden bed. A wide variety of vegetables can be grown in container. Tomatoes, peppers, squash plants and lettuce are examples of plants that will thrive in a pot. A container vegetable garden is a good way to provide fresh, nutritional produce even if you don't have the space for a garden.
Everyone wants what they can't have. Direct sowing of plants that are not native to your area is rarely successful. Plants are found in specific areas because the soil conditions are favorable for them to thrive. Use the pot to provide a friendly environment for your exotic plants. Changing the soil makeup of a pot is easier than changing the soil makeup of your backyard.