Mulch & Supply Yard

Mulch, stone, erosion control, tools, and bulk materials


1078 New Castle Road, Prospect, Pennsylvania 16052 (Route 422 near the Big Butler Fairgrounds)



8AM – 4PM Monday – Friday
8AM – NOON Saturday [Seasonal & By Appointment]


Get in Touch

Spring has sprung at Fossil Rock’s supply yard!


SATURDAY hours have resumed as of March 16, 2024. We will be open Saturday mornings, 8AM to noon until about early June. Check our Facebook page for additional updates about Saturday hours.

We offer a variety of mulch and stone (limestone and gravel) options, as well as:

  • Mushroom compost
  • Topsoil
  • Grass seed & fertilizer
  • Sand
  • Pallet filter sock and erosion control devices
  • Rigging
  • Safety supplies and work gloves
  • Tools
  • and more…

Our supply yard and store is conveniently located on Route 422 (New Castle Road) 10 minutes west of Butler – a stone’s throw from the Big Butler Fairgrounds.

Fossil Rock Supply one-page price list [PDF] – our most popular items on one convenient page!  Looking for something specific? Ask us!

Are you a professional landscaper or contractor?  Contact us for commercial account options.

All mulch products are natural and non-toxic. Our mulch contains no pallet material – it is produced from land clearing debris and sawmill bark removal. 

We have tools!  Bully Tools are 100% made in the U.S.A. and Fossil Rock has them.  Bully Tools are made in Steubenville, Ohio.

Fossil Rock prioritizes USA-made and locally sourced products.

Ready to order? Have questions?

Reach out to us at or call 724-355-3747.

Pick up in our yard on Rte. 422 or we can deliver!

Cash and major credit cards accepted.


Supply yard map