Wood vs Rubber Mulch: Which Is Right for Your Yard?

Rubber mulch sells itself on permanence: install once, never replace. But it's the wrong material for most landscaping. Here's where each one wins and where each fails.

Where rubber wins

• Playgrounds — ASTM-rated for fall protection up to 12 feet
• Dog runs and high-traffic pet areas
• Permanent walking paths in shrub beds
• Areas where you absolutely don't want soil amendment

Where wood wins

• Any bed with plants in it — wood feeds soil as it breaks down
• Tree rings and foundation beds
• Vegetable gardens (use straw or leaves, not dyed wood)
• Anywhere aesthetics matter season to season

The cost comparison

Wood: ~$40/yd³ × every 2 years = $20/yd³/year. Rubber: ~$300/yd³ × every 10 years = $30/yd³/year. Wood is cheaper over a decade — and that's before counting the soil benefits you get from wood that you don't get from rubber.

Environmental concerns with rubber

Most rubber mulch is recycled tires. Studies show it can leach zinc, heavy metals, and volatile compounds in hot weather. Don't use it in vegetable beds, near drinking water sources, or in beds where kids play hands-in.

Heat

Rubber mulch surfaces can hit 160°F in full sun — significantly hotter than wood. Bad for plant roots and bare feet.

Maintenance differences

Wood: top up annually with 1" of fresh mulch ($10–$15 per bed per year). Rubber: every 5–10 years, blow off leaves, redistribute. Rubber wins on labor, hands down.

The honest recommendation

Use rubber only in playgrounds and pet areas. Use wood everywhere else. The 'install once forever' promise of rubber mulch isn't worth the downsides for typical garden beds.