What is mulch?

Simply defined, mulch is a covering placed over soil. Various materials can be used as mulch depending on the desired application and effect. Everything from grass clippings to cardboard to rocks can be used to blanket the ground.

Advantages:

Depending on the material used as mulch, there can be many advantages. These may include:

help prevent soil erosion
suppress weeds
increase soil temperature
conserve water - reduce evaporation
improve soil texture
add nutrients to the soil
decorative - adds appeal to the yard
less cultivation of the soil
can provide a pathway to walk on
may be a deterrent to animals, pests and bugs
encourages favorable soil microbial activity and worms
time saving - the areas mulched don't need as much attention

Disadvantages:

Mulching can also have some disadvantages as well. Again choice of material used will play a part in these:

cost of materials
the need to top off periodically
weed seeds can be spread
it may provide cover for slugs - which can destroy peas and carrots
moist organic mulch can cause rotting at the base of many plants

If you are unsure of which mulch would best suit your particular needs, it may be a good idea to discuss these concerns with your landscaper or a gardening expert.