A great (and cost effective) way to control weeds be free adding mulch to gardens!
 
3 sizes for YOUR convienince:
3x25' $4.99/roll
3x50' $8.49/roll
3x100' $15.99/roll
Stops garden mulches (stone, bark etc.) from mixing with the soil
Keeps your landscaped area clean and tidy
Prevents soil erosion
Specifically designed for use in perennial gardens.
Soil Stabilization - separates stone and subsoil to prevent intermixing  under driveways, interlocking brick etc.
Drainage - reduces pressure, minimizes leakage and prevents pooling  water around wood or stone retaining walls.
Erosion - helps stop erosion on stream and river banks, embankments  and other slopes.