Custom compost mixes
For Colorado Soils & Climates
What is compost?
Let's get technical
Compost is a product made through the controlled aerobic decomposition of biodegradable materials. Through mesophilic and thermophilic phases, composting reduces harmful pathogens and weed seeds, stabilizing the organic matter into a nutrient-rich soil amendment.
Timberline follows the definition set by the U.S. Composting Council (USCC) and the American Association of Plant and Food Control Officials (AAPFCO).
We are proud to be:
- A member of the U.S. Composting Council
- Colorado Proud, supporting local agriculture and sustainability
Why Use Compost?
- Soil Health:
- Improves moisture retention and drainage, balances soil structure
- Plant Growth:
- Supports healthy root systems and long-term vigor
- Microbial Life:
- Encourages healthy, diverse microbial communities
- Sustainability:
- Diverts waste from landfills, reducing methane emissions
- Cost Savings:
- Reduces the need for chemical fertilizers and frequent watering
What We Accept
Timberline is a Class II Composting facility permitted by the Colorado Department of Public Health & Environment (CDPHE) and accepts:
Green Waste
Wood Waste
Manures & Bedding
Agricultural Waste
Compost Products
All products are produced by Timberline Rock N' Roll and screened at 1/2"
TRR Pro Compost
Class I
- Made from green waste (no manure)
- Rich in organic matter, improves drainage and moisture retention
- Consider using for sensitive plant
- Safe for a wide array of uses
- Usage:
- Sod: 4 yds to 1,000 sq. ft.
- Plantings: Mix up to 20-30% with excavated soil
- Topdressing: Apply 1/4-1/2″
- Mulch: Apply 3-4″ deep, 2-3″ from stems
TRR Premium Compost
Class II
- Manure-based
- Cow, bison and equine manure blended with green waste
- Moderately rich in organic matter, improves drainage and moisture retention
- Higher nutrient levels than Class 1
- Best for amending garden beds and sod installs with poor soil
- Usage:
- Sod: 4 yds to 1,000 sq. ft.
- Plantings: Mix up to 20-30% with excavated soil
- Topdressing: Apply 1/4-1/2″
- Gardens: Till 3″ into top 6″
TRR Humus Compost
Class II
- Manure-based
- Highly stable and mature
- High humic acid content
- Safe for vegetable gardens, lawns, and general topdressing
- Can be used as a substitute for fertilizers
- Engineered for efficiency
- Usage:
- Topdressing: Apply 1/4″
- Plantings: Mix up to 10% with excavated soil
- Gardens: Till 2″ into top 6″
TRR Ready Bed Soil Mix
- All-purpose mix
- Excellent water holding and drainage
- Best soil mix for garden beds without amendments
- Recycled Materials:
- We believe in reusing materials such as vermiculite and perlite, reviving resources to grow greener. This product is formulated with a recycled peat mix, thoughtfully reintroduced to improve moisture retention while maintaining an open, porous soil structure that supports healthy roots and efficient growth.
- Mix
- 80% Recycled Peat
- 20% TRR Premium Compost
- Can be used as a potting mix or in large planters.
TRR Amended Topsoil
Class I
- Amended with TRR Pro Compost
- Ready to use
- Usage:
- Building up soil levels prior to sod install
- Filling large depressions
- No tilling required
- Mix
- 60% Topsoil
- 40% TRR Pro Compost
TRR Amended Topsoil
Class II
- High nutrient amended topsoil
- Amended with TRR Premium Compost
- Moderately rich in organic matter, improves drainage and moisture retention
- Usage:
- Building up soil levels prior to sod install
- Filling large depressions
- No tilling required
- Existing Lawns:
- Topdress at 1/4-1/2″
Specialty Blends
Looking for something different? We offer custom mixes, including specialty blends, compost/soil combinations, and additives tailored to your project. Whether you need blends for athletic fields, native plantings, erosion control, or rooftop gardens, our team can help.
If you’re not sure what’s best, we’ll recommend the right mix for your site. All materials are lab-tested and screened for consistency, then delivered directly to your jobsite for convenience. Orders require a minimum of 50 yards per order.
Bioretention Mix
Our engineered bioretention blends are designed to manage stormwater efficiently while supporting healthy plant growth. These mixes meet project-specific performance requirements for infiltration and filtration, making them ideal for RAIN GARDENS, bioswales, and other green infrastructure applications.
Want to learn more?
Composting Basics
How it works:
- Aerobic decomposition (oxygen-rich) is ideal: reduces odor, speeds breakdown
- Correct C:N ratio (20–30:1) helps microbes thrive
- Thermal activity generated by microbes kills pathogens and weed seeds
What We Recycle
- Tree & Grass Clippings
- Leaves
- Untreated Pallets
- Livestock Manure
- Garden Waste
Compost Conditions
- Moisture:
- 40–50% optimal
- <30% = fire risk,
- >60% = odor
- Bulk density:
- Target 30–40 lbs per 5-gallon bucket
- Oxygen:
- Microbes consume all available O2 in 30 minutes
- Temperature:
- Maintained above 131 degrees during active phase of composting
Let Timberline Help
Not sure what you need? We test compost and your soil to recommend the right solution. Whether you’re building garden beds, prepping for sod, or improving your property’s soil health—we’ve got the product and guidance to help.
Contact us to schedule a soil test or ask about custom blends.
