What are the key differences between granite and marble outdoor planters in terms of durability?

When choosing outdoor planters, durability is a critical factor, especially when comparing granite and marble. Granite is an igneous rock known for its exceptional hardness and resistance to weathering, making it ideal for outdoor use. It can withstand extreme temperatures, heavy rain, and UV exposure without significant wear. Marble, on the other hand, is a metamorphic rock that, while elegant, is softer and more porous. This makes it more susceptible to staining, cracking, and erosion over time when exposed to harsh outdoor conditions. Granite planters require minimal maintenance and retain their appearance for decades, whereas marble planters may need regular sealing and care to prevent damage. For long-lasting outdoor decor, granite is the more durable choice, while marble is better suited for protected or indoor environments.