Blended Compost Products from Thelen Materials

Cumbersome yard waste becomes beneficial compost at Thelen's IEPA permitted yard waste disposal facility located at our Antioch facility.  Our stringent yard waste receiving guidelines in which minimizes trash contamination and superior scientific process ensure the highest quality compost available.

The quality our products possess and the ability to blend onsite with materials mined by our aggregate division makes us virtually incomparable in product availability and cost.

Thelen Organics blended compost products are extremely popular and used in many of Chicagoland’s top golf courses and by landscaping companies of all sizes. Thelen’s compost products are used for a variety of turf management applications as well as a number of planting applications. A couple of our most recent and notable jobs have been providing these compost blends to Chicago’s Millennium Park, Chicago Botanic Gardens, and Lisle’s Morton Arboretum.

Choose from a wide selection of specialty blends for your next landscaping project. Compost is sold by the yard, and is available for pick up or delivery year-round.

The Process

Thelen’s compost product is 100% organic material produced from yard waste such as grass clippings, leaves and brush. This product is free of manure. The quality our compost possesses is due to our stringent yard waste receiving guidelines, thorough aeration process, and four unique screening processes.

In order to produce our stand alone quality, all three of these steps are vital to achieve maximum quality. The entire process takes anywhere from 60-90 days depending on the weather. During that period of time, the compost reaches anywhere from 120-160 degrees Fahrenheit and is turned over an average of 10 times within the production time frame. After the 60- to 90-days, our straight compost product is screened once down to a 3/8″ size.

When our compost is blended with either/both sand and topsoil, the compost screening process is repeated through an 8mm size screen eliminating, to the best of our ability, the small twigs or sticks that have found their way through the initial screening.

Our strict waste receiving guidelines, our superior scientific knowledge on the production of compost, and our in-depth screening processes allow Thelen Organics to achieve the utmost quality in our compost. We are confident that no other compost products will achieve this quality standard and represent the same value as Thelen’s compost products.

Inbound Materials Accepted and Outbound Products Available

STA Certified Compost

Inbound Yard Waste Materials Accepted:

  • Grass clippings (no sod)
  • Leaves
  • Brush (up to 4″ diameter and 6′ lengths)

Outbound Products Available:

  • Screened Topsoil
  • 3/8 Screened Compost
  • Leaf Mulch
  • Bio-swale soil blends
  • Planting Mix
    • 1/3 Compost
    • 1/3 Sand
    • 1/3 Screened Topsoil

*Specialty Organic Blends: 
Compost, sand, topsoil soil blends available to any and all unique percentages