How do manufacturers test composite planters for resistance to root penetration through drainage holes?

Manufacturers test composite planters for resistance to root penetration through drainage holes using rigorous methods to ensure durability and plant health. Common techniques include accelerated aging tests, where planters are exposed to moisture and root growth stimulants to simulate long-term use. Some manufacturers insert fibrous materials or live roots near drainage holes to observe penetration over time. Others use pressure tests to measure the structural integrity of the planter when roots attempt to grow through the holes. High-quality composite materials with reinforced designs often show superior resistance, preventing root damage and extending the planter's lifespan. These tests help ensure that planters remain functional and aesthetically pleasing for years.