What Sort of Mulch Does Not Attract Cockroaches

I am looking to cover about 20 square metres with a weed mat and was looking to put some mulch on top of the mat. But I am told, mulch almost always attracts cockroaches. Can't put hay because that will attract the rats. Gravel is too expensive.
What kind of mulch does not attract cockroaches ?
Any ideas on what I could cover the weed mat with ? Just slightly aesthetically pleasing is what am after.

Cheers,

Comments

  • +1

    What did the guy at the garden supply centre suggest when you called him?

    • He just asked me if I want single grind or double grind. He didn't have the authority/education to comment on roaches :(

      • +6

        You didn't accidentally call the local coffee shop?

        • No. No.

  • +1

    non organic mulch? aka concrete

    • I'd still like to be able to plant a fruit tree someday. So concrete is out.

    • carpet

  • +1

    Cedar if you can find any… Next best would be Cypress.

  • +1

    Something with pyrethrins through it?
    Get come chrysanthemums chopped up in the mulch?

  • stone pebbles

    $$$ + heavy

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