Successful container gardens can be created in just about anything, except copper vessels. Suitable containers include terra cotta and glazed pots and planting boxes made of concrete, wood and plastic. You also can use birdbaths and hanging baskets. Without drainage, water will remain in the bottom of the container and will suffocate plant roots. Experienced gardeners often prefer larger containers to small ones.
Larger containers hold more plants, which create greater visual impact.
They also need less frequent watering. Before selecting the container, however, consider the space in which it will be placed. A very large container in a small space will look unbalanced and will make the small space seem crowded. Select a potting mix formulated for containers. You will find many to choose from.