How to Keep Mulch in Place on Sloped Landscapes

Steep slopes shed mulch, especially lightweight bark. The solution depends on slope steepness, mulch type, and traffic.

Effective Methods

• Jute erosion mat: Staple biodegradable jute netting to the slope, then spread mulch on top. The matrix holds mulch until vegetation establishes.
• Coarse mulch: Large bark nuggets, wood chips, or shredded redwood "gorilla hair" interlock and resist washing.
• Rock mulch: River rock or crushed stone stays put on any slope but retains heat.
• Terracing: Mini-berms or edging boards every few feet create level planting shelves.

What to Avoid

Fine bark, sawdust, or straw on slopes >3:1 (33%). Foot traffic, dogs, and wind will displace any mulch without physical containment.

Best Practice

Combine jute mat + coarse mulch + deep-rooted groundcover (e.g., Juniperus horizontalis, Cotoneaster) for permanent stability.