What is the Difference between Compost and Soil?


Spring is only a few months away, which means it is time to start planning your springtime planting. Have you ever wondered about the differences between compost and soil? How each of these materials can be utilized in your commercial and residential landscaping?


Continue reading to learn more about these two materials: 


Compost 


Technically speaking, compost is an organic plant and animal matter that has decomposed. Compost is not a replacement for topsoil; instead, it improves soil quality by tilling it into the soil. It is rich in nutrients, and it can also make nutrients that are in the soil more easily available to plants. 


Soil 


In the landscaping world, soil tends to be a loose term referring to dirt. In the landscaping realm, there are two main types of soil you will hear about: topsoil and garden soil. 


Topsoil 


Basically, topsoil is used for putting on top of garden soil. Topsoil contains a calculated mixture of silt, clay, and sand and has a wealth of nutrients that your plants require to grow and survive. 


Garden Soil 


Healthy soil is required for growing healthy plants. This is when the garden soil comes into play. Prior to planting, garden soil and existing soil are turned in order to increase soil quality. Garden soil is not much different from the existing soil in your garden. When you buy garden soil, you will want to be sure the materials will mix well with your existing garden. You also want to be sure that these materials are compatible with whatever you are attempting to grow. 


To learn more about compost and soil, such as garden soil and topsoil, give us a call or stop on in. Our specialists will be happy to assist you.

Hands in blue gloves laying red bricks on sandy ground
August 29, 2026
Learn which aggregate base materials go under pavers, artificial turf, and retaining walls, plus compaction and drainage tips for lasting results.
Desert garden with succulents and shrubs beside a sidewalk, with buildings and blue sky in the background
July 26, 2026
Explore water-wise landscape materials — rock, mulch, soils & erosion control — from North County Supply for drought-tolerant SoCal yards.
Close-up of brown wood chips mulch filling the frame
June 28, 2026
Learn how to calculate soil, mulch, gravel, and rock quantities for landscaping projects. Avoid costly ordering mistakes with this practical estimating guide.
Landscape with trimmed trees, white gravel, and circular green shrubs beside a patterned walkway
May 31, 2026
Compare decorative rock and mulch for landscaping. Learn differences in cost, maintenance, appearance, and best uses for Southern California landscapes.
Freshly plowed dark soil in foreground with a line of green trees under a hazy sky
April 23, 2026
Get your landscape ready for spring with sustainable soil and mulch practices. Learn composting, soil testing, organic amendments, and water-saving tips.
Gravel surface with various sized gray, beige, and brown rocks.
February 13, 2026
Discover landscape design ideas using aggregate and crushed rock for pathways, borders, and dry creek beds that offer durability and low maintenance.
Playground with a slide, climbing structure, and swing set, surrounded by grass and trees.
January 20, 2026
Learn what certified playground chips are, how ASTM safety standards protect against injuries, and why schools and parks rely on them for safe play areas.
Handful of wood mulch, held up against a brown background, showing its texture.
December 23, 2025
Prepare your landscape for winter with bark, aggregates, and accessories that protect plants, improve drainage, and maintain healthy soil all season long.
Person wearing orange gloves, spreading brown mulch around green plants from a red bucket.
October 28, 2025
Learn how different types of mulch — organic, colored, shredded, and playground chips — help control weeds, retain moisture, and improve your landscape’s health.
A small plant with green leaves in dark brown soil.
September 25, 2025
Choose the right soil for San Diego landscapes with North County Supply. Clean, custom blends and expert advice for gardens, turf, and large-scale projects.