Worcestershire,
United Kingdom 
does putting bark chippings prevent weeds
7 Aug, 2010
Answers
As MG says, don't be stingy. I would use 5 cm, minimum.
7 Aug, 2010
I never really knew,but for the first time I this year I mulched some around some bedding plants to keep moisture in,and its really has kept weeds at bay
7 Aug, 2010
Yes Guest provide you put down a thick enough layer and keep topping it up. It also and humus to the soil as it breaks down.
7 Aug, 2010