Managing waste wisely

Garden Mulch – FAQ’s

The Western Metropolitan Regional Council offers free mulch to its Member Council* residents all year round. Below are some handy hints to help you make the most of your mulch!

Why Mulch?

  • Insulates the garden
  • Suppresses weeds
  • Reduces water use
  • Reduces the need for fertilisers
  • Reduces soil erosion
  • Looks good!

What is WMRC mulch made from?

It is organic mulch made from the prunings, lawn clippings, bark and leaf litter collected from WMRC’s Member Council residents and delivered to the West Metro Recycling Centre. It is then commercially processed to make it suitable to reapply as mulch to your garden – a great example of closed loop recycling!

How do I apply mulch?

  • Remove weeds
  • Water the garden, if dry.
  • Spread an even layer of mulch over the soil’s surface.
  • Leave a gap around tree trunks and plant stems to avoid root rot.
  • Apply a wetting agent to mulch to prevent it from becoming water repellent as the mulch breaks down.

How deep should I mulch?

Up to 75mm is ample to conserve water and suppress weeds. Too much mulch will suffocate plant roots and kill a plant.

Is mulch the same as compost?

No. Mulch gets applied onto the surface of the soil, like a protective cover. Organic mulch breaks down gradually over time to provide nutrients to the soil.

Compost is organic matter that has been fully decomposed and needs to be mixed into the soil to release valuable nutrients. For more information on compost, see our How to Compost Factsheet.

What can I use WMRC mulch on?

WMRC is great for use around shrubs, trees and native plants, in garden beds or pots.

When can I mulch my garden?

Mid – late Spring is the ideal time to mulch, however you can mulch any time of the year!

How long will mulch last?

1-2 years.

Click Garden Mulch FAQ’s to download an A4 version of this factsheet.

Which Councils are WMRC Member Councils?

Town of Cottesloe, Town of Claremont, Town of Mosman Park, Shire of Peppermint Grove and City of Subiaco.