Pea gravel’s lifespan depends on how well you care for it, and it may need to be replenished or replaced over time. While pea gravel won’t decompose, it may settle into the soil below and require an extra layer every few years.
You may also need to regularly add gravel to make up for anything that gets kicked or blown away. On average, homeowners are looking at needing to add new pea gravel to their patio after 24-36 months. More porous soil may require more frequent, annual maintenance.