Mulch on garden beds can help save water but as well as reduce the amount of time spent on weeding. Mulching can also be used to improve the appearance of your garden. Organic mulches are those that used to be living material, such as bark, straw, leaves, grass clippings and pine needles. These organic mulches improve the soil by adding nutrients as they decompose and encouraging earthworm activity. The use of mulch is one of the most important those strategies in creating a efficient garden.
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MULCH IN THE GARDEN

WHY MULCH?
If you're looking for a way to save lots of time in the garden, look no further. Mulching your garden beds can help save water but as well as reduce the amount of time spent on weeding. Mulch can also be used to improve the appearance of your garden.

Organic mulches are those that used to be living material, such as bark, straw, leaves, grass clippings and pine needles. These organic mulches improve the soil by adding nutrients as they decompose and encouraging earthworm activity. The use of mulch is one of the most important those strategies in creating a efficient garden. A good covering of mulch:

 

A good covering of mulch:

a. prevents weed germination and growth and so eliminates a wasteful source of water use.
b. minimises evaporation from the soil surface and hence reduces losses from bare soil areas.
c. helps to maintain an even soil temerature.
d. can help improve soil structure and properties such as water holding capacity and encourage microbiological and worm activity.

 

How much Mulch do I need?

Generally 30 millimeters or 3 inches of mulch is the best depth. Less than this is not effective in preventing weeds and maintaining moisture and temperature levels. More than this can prevent water penetration.

What sort of Mulch should I use?

Mulches fall into two catagories. Landscape Mulch and Soil conditioner mulch.

Landscape Mulches are mainly decorative, even sizes, slow to break down, do not move around.

Soil conditioning Mulches add nutrients to the soil, break down.

Our favourite (at the moment) is sugarcane mulch. However their are lots of different mulches to choose from and some suite some applications better than others.

Sugarcane Mulch
Left over from the sugar cane harvest, rich in organic nitrogen and quick to decompose.

Pea Straw
Braeks down very quickly, but is rich in nitrogen

Tea Tree Mulch
Slow to break down and is said to deter some pests such as termites

Pine Bark and Red Gum Chips
Heavier and slow to break down. Contains do real nutrients. Used widely in commercial situations.

Pebbles, Gravel and Stone
Again they are heavy, and naturally they have no nutrients and will not break down. Can be very decorative. Heat reflective but let all of the moisture through. (no black plastic please)

Green Mulch
This is the mulch produced by tree pruners. It tends to draw down nitrogen and contains phtotoxins which may act as a growth inhibitor. Green mulch should be left to decompose for a year or two before use.
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