You do not need approval for:

• • a low growing water wise garden
  • reticulation
  • verges mulched with organic mulch
  • lawn

You do need approval for:

• paving or other hardstand, such as brick or concrete paving

Read their guidelines for detailed policy.

All street verge treatments in commercially zoned areas require formal approval. 

https://www.cambridge.wa.gov.au/Resident/Home-Neighbourhood/Your-property/Trees-Verges/Verges