Raised wood planter box structures make gardening more enjoyable by allowing you to comfortably stand tall and tend to your plants without having to constantly bend over or kneel down. The planter box creates a barrier to prevent animals from nibbling or trampling your plants. HDPS - High Density Polyethylene Plastic - is a common material for outdoor furniture. It is unaffected by weather and is less likely to fade, crack or mold. Raised planter boxes require minimal maintenance, so it's easy to keep their appearance and performance intact. Drainage holes are usually designed to allow excess water to flow out of the planter, preventing water from pooling at the bottom and causing damage to the planter and plants. The design of the drainage holes in the planter helps to keep the plant and the planter healthy and makes the planter more durable. If you have a large number of plants, you can use small and large sized planters together to create a more cozy and natural small garden.