About Colorado Materials, Inc.
Longmont's Trusted Landscape Supply Company Since 1999
As a locally and family-owned landscape supply yard in Longmont, Colorado, Colorado Materials, Inc. has served homeowners, landscape contractors, architects, and developers across the Front Range since 1999.
Why Choose Colorado Materials
We stock and deliver premium mulch, soil, compost, decorative rock, flagstone, stripstone, gravel, base materials, sand, patio products, retaining wall blocks, and landscape tools carefully selected for Colorado’s climate.
Consistent, premium quality
Our mulches are clean and uniform which means no oversized bark chunks, rocks, dirt, or insects. They help retain moisture and regulate soil temperatures to protect roots in Colorado’s dry climate.
Topsoil and compost are processed to remove roots, large stones, and other foreign matter. We source and produce nutrient‑rich compost from natural inputs that are screened for a consistent, ready‑to‑use texture.
Curated for Colorado landscapes
Products are sourced from trusted suppliers who share our commitment to quality and performance in the Front Range’s demanding climate of freeze–thaw cycles and intense UV exposure
Large in‑stock selection
From decorative rock and gravel for xeriscaping and drainage to flagstone and stripstone for patios, walks, and walls, our yard keeps the most‑used sizes and colors in stock for efficient project timelines.
Convenient delivery
Our trucks run from early morning to late afternoon, including Saturdays in the busy season, so you can get materials when you need them. We coordinate delivery windows and communicate from order to drop‑off.
Family‑owned service
Since 1999, we’ve earned repeat customers through honest advice, transparent pricing, and dependable fulfillment. We treat customers the way we want to be treated.
See & Compare Materials in Person
Visit our Longmont supply yard at the southeast corner of Boston Ave. and South Sunset St. (1541 Boston Ave, Longmont, CO 80501).
Our display patio showcases completed installations and individual products so you can compare textures, colors, and sizes before buying
Hours of Operation
Mon-Fri: 7am - 6pm
Sat: 8am - 4pm
Sun: CLOSED
What We Stock
Decorative rock and gravel for xeriscaping, pathways, and drainage
Wood mulch blends designed for moisture retention and weed suppression
Topsoil, garden mixes, and screened compost to build healthy soil
Base and sand for pavers and hardscapes
Flagstone, stripstone, and boulders for patios, walkways, and walls
Retaining wall blocks and cinder blocks
Building materials, ice melt, and landscape tools
Supplies We Carry
Explore Products
Quick Answers
Do you deliver?
Yes. We offer scheduled delivery across Longmont, Boulder County, and the Denver metro/Front Range with morning and afternoon windows, including Saturdays in peak season.
Can I see materials before purchasing?
Yes. Our yard features display areas with installed examples and bins of individual materials for side‑by‑side comparison.
Are your mulches and soils clean?
Yes. Mulches are screened for consistency; soils and compost are processed to remove roots, large stones, and debris.
Do you help estimate material quantities?
Yes. Use our Material Calculator or call us with project dimensions and we’ll help you estimate quantities for your order.
Who do you serve?
Homeowners, landscape contractors, architects, developers, and property managers.
