Cumbersome yard waste becomes beneficial compost at Thelen Organics’ facility in Antioch, IL. Our strict receiving guidelines 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 most 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.

Download our color literature here, (481 – kb pdf)


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 any sort 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 the Thelen’s compost products.

Brush (up to 4” diameter and 6’ lengths)

3/8” Screened Compost
Leaf Mulch
Planting Mix:
– 1/3 compost
– 1/3 Sand
– 1/3 Screened Topsoil

Blending to suit all needs.

(Permit #1996-005OP)

Operating Hours:

March 18th – 29th
7:00 a.m. – 3:00 p.m. (M – F)

(Sat closed)
April 1st – October 4th
6:00 a.m. – 4:00 p.m. (M – F)

April 8th – May 31st
7:00 am – 11:00 am (SAT)

June 10th – October 4th
7:00 a.m. – 10:00 a.m. (Sat)

October 7th – November 22nd
6:00 a.m. – 4:00 p.m. (M-F)

October 14th – November 23rd
7:00 a.m. – 11:00 p.m. (Sat)

November 25th – December 6th
7:00 a.m. – 3:00 p.m. (M-F)

Closed Saturdays


May 27th, 2013

July 4th, 2013

September 2nd, 2013

November 28th, 2013

December 9th, 2013 – March 17th, 2014