Does marble crack under direct sunlight in outdoor flower boxes?

Marble is a popular choice for outdoor flower boxes due to its elegant appearance and durability. However, many gardeners wonder if prolonged exposure to direct sunlight can cause marble to crack. While marble is generally heat-resistant, extreme temperature fluctuations and prolonged UV exposure can lead to surface deterioration or micro-cracks over time.

To minimize risks, opt for thicker marble slabs, seal the surface regularly, and consider partial shading for flower boxes in hot climates. Lighter-colored marble tends to withstand sunlight better than darker varieties. With proper care, marble flower boxes can maintain their beauty for years without significant cracking.

For long-term outdoor use, combining marble with other weather-resistant materials or choosing marble-alternative composites may provide better durability in harsh sunlight conditions. Regular inspection and maintenance remain key to preserving marble's integrity in garden settings.