Planting plastic and fiberglass are extremely durable and last longer than other traditional plant materials because they are naturally resistant to all kinds of external forces, including weather and wear and tear.
No matter where you plan to build your garden, you can count on your plastic planter to withstand the scorching sun and winter sleet. Plastic pots are non-porous and non-hygroscopic, which means water and mineral salts stay in your plants, keeping your moisture-loving plants healthy. This type of planter also doesn't absorb excess moisture from the air or oxidize like metal plants, so your plastic planter will resist the urge to decompose.
Due to temperature variations between growing seasons, some plant matter grows in hot weather and shrinks in cold weather. Especially for outdoor pots, the small cracks created by the expansion and contraction of the plant can put your entire plant at risk. The durability of the plastic means these pots are good at handling temperature changes, even when they're outside in the winter.