Construction & Landscape Supplies for Professionals

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

Saturday hours have resumed for the spring!  We will be open Saturdays 8AM-noon beginning March 16, 2024 through early June. Check out our Facebook page for updates.


We’re not your ordinary mulch yard.


Fossil Rock knows that high quality, cost-effective materials and tools are essential to your bottom line.

As a professional landscaper or contractor, your ability to deliver the best finished product to your customer is crucial to your profitability and sustainability.

We can help you.

Our partnerships with local producers and distributors of mulch, stone, erosion control, and other construction and landscaping products will help you expand your margins and deliver on your customer promises.

You’ve been frustrated with the lack of options.  We get it.  We opened our supply and mulch yard to fill the gap.

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

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

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. [Learn more about our mulch.]

Our supply yard and store is conveniently located on Route 422 (New Castle Road) 10 minutes from 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 more?  Check out our EXPANDED product list [PDF] for professionals.

NOTE: To ensure that only professional contractors and landscapers benefit from our competitive pro pricing, we ask you to complete our Commercial Account Setup.  Setting up an account with us takes less than 5 minutes and grants you access to our professional-tier pricing. 

Want the payment flexibility of a house account and delayed billing? You can complete the Commercial Credit Account Application online here, subject to FRS approval.

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.

Contractor Tool Special:  Buy 2 or more long-handled tools or wheelbarrows and get 10% off those tools.
Single items at regular price.  Excludes hand tools.

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 to your location or jobsite.


Supply yard map