Organic Soil vs. Compost (2024)

It’s important to understand the differences between organic soil and compost when framing any discussion of the topic, as the terms are often erroneously used interchangeably.

In simplest terms, soil serves to support plant life, while compost enriches the soil itself.

Enrichment Leads to Growth

Compost is comprised of a combination of decayed (or decaying) matter, and is typically crafted by gathering plant materials such as leaves, grass clippings and vegetable peels for decomposition within the soil. As there are many components which make up this mixture, pH levels have a tendency to vary drastically.

Compost must be created properly to eliminate all existing pathogens, insects and “bad” bacteria; unwanted absorption of organic carbon can leave microbes to starve and die. The goal, ultimately, is for custom compost to function as a means of enriching the organic soil with microorganisms, mineral elements, and humus.

This balanced substance helps to restructure—and subsequently boost—the soil ecosystem, leading to increased plant growth over time. Proper customization facilitates air circulation, root development, moisture retention, and the channeling of nutrients to the roots. When this is accomplished, organic soil is primed for planting.

Nurturing Through Nutrients

Organic gardens are centered on a superb growing environment, crafted to surround the plants to be nurtured, and include components ranging from soil and food to insects and wildlife—but at the “root” of it all remains the importance of maintaining an enriched soil product.

When functioning at its prime, soil contains fungi, bacteria, microbes and small insects, all of which serve to continuously break down organic matter. This symbiotic relationship helps plants to absorb oxygen, food and minerals from the soil, keeping them in reserve until the point when the nutrients are needed.

As organic gardens thrive, they continue to provide food and shelter to pollinators such as insects and birds, all of which work in conjunction to keep those pests that would upset this delicate environmental balance at bay.

Environmental Collaboration

As with most partnerships, the key to the success of compost and organic soil lies in each maintaining its respective role throughout the process. While micro- and macro-organisms are known to break down carbon-containing matter naturally, composting can accelerate this decomposition, providing an ideal mixture of air and moisture to foster the microbial feeding frenzy.

Organic matter has the innate ability to pull metals, chemicals and nutrients out of liquid solutions, such as water; these substances are then absorbed into soil surfaces, broken down by microbes, and used for subsequent growth by plants down the line. This ultimately helps to provide ideal habitats for wildlife, reduces erosion, increases soil pore space and air filtration, and enhances aesthetic appeal.

End Results

Composting improves soil’s physical, chemical and biological properties, yielding not only healthier earth, but also allowing plants, turfgrass, trees and shrubs to similarly flourish, by extension.

As organic matter increases within the soil, its structure and porosity is improved, leading to a superior plant root environment. Benefits include increased moisture infiltration and retention, reduced density in favor of permeability, and less issues involving water and wind erosion and runoff, which can lead to substantial water loss over time.

By aiding in the proliferation of soil microorganisms, organic matter buffers the soil pH, making nutrients more readily available for plant uptake while also filtering out contaminants that may exist in the water.

Though different in composition and function, compost and organic soil are dependent upon one another to function at an optimal level, enriching both the soil environment and all that grows from it.

For further information on organic soil, amendments, composting and more, contact Long Island Compost today.

Organic Soil vs. Compost (2024)

FAQs

What is the difference between organic soil and compost? ›

Though the terms are often used interchangeably, organic soil serves to support plant life, while compost is typically used to enrich the soil itself.

Should I use soil or compost? ›

Compost can dry out quite quickly, so mixing it with topsoil is a great way to provide balanced bedding for plants and flowers. You get the best of both worlds with a mixture since topsoil will offer a robust home for roots with plenty of water, while compost will provide a boost of nutrients.

Do plants grow better in soil or compost? ›

ANSWER: Plants should not be grown in compost alone. Compost is a soil additive that makes soil richer by increasing the nutrients it contains and also improves the texture of the soil. However, without mixing compost with soil, plants end up getting too much of a good thing.

What percentage of organic matter is compost? ›

Organic matter: An organic matter content (dry basis) of 50 – 60 % is desirable for most compost uses. EC (Soluble Salts): Composts typically range from 1 to 10 mmhos/cm. High salinity may be toxic to plants.

Can I mix compost and topsoil together? ›

You can mix compost with topsoil to create your own potting compost, as many of the nurseries do, which gives you the advantages of soil – namely that it dries out more slowly and holds its structure better – together with the benefits of compost – organic matter and more nutrients, a compost made with loam or soil is ...

Can you have too much organic matter in soil? ›

Misuse of fertilizer and livestock manure is a problem, but excess organic matter can be a problem too. Remember that organic matter in the soil is a reservoir of nutrients and that decomposition of organic matter mineralizes those nutrients.

Can you plant in 100% compost? ›

Compost is one of the best garden amendments available. You can plant in straight compost, but I suggest incorporating it into your sandy garden soil or mixing it with other additives if you want to use it for container plantings.

Can too much compost hurt plants? ›

Adding too much compost may be harmful, especially in vegetable gardens. You can apply too much compost at one time or over several years. Too much compost in soil stunts plant growth. It also may create water pollution.

Does compost eventually turn into soil? ›

As compost matures and becomes humus, it shrinks and accounts for less than 2% of soil organic matter. Therefore, although compost and humus do become an important part of the soil, they cannot themselves become real soil.

Are eggshells green or brown compost? ›

Green materials include fruit and vegetable scraps, used tea, coffee grounds, crushed eggshells, grass clippings, green plant cuttings, old flowers and many weeds. Brown materials are things like straw, paper and cardboard, dry leaves, woody prunings and sawdust (but not from treated wood).

What is a cheap source of nitrogen for compost? ›

Composting of organic material is a great way to add a nitrogen-rich fertilizer to your soil. Did you know that coffee grounds, egg shells, tea bags, grass clippings, and fruit and vegetable kitchen scraps are all great additions to your compost pile? Remember, patience is a virtue in the composting game.

Which soil has the highest organic content? ›

Soil from an area full of trees has the highest organic content. It is the due to decaying of leaves, branches of trees, twigs, remains' of insects, animals and their excreta etc. so it is highly fertile. The amount of moisture is high in this soil.

Can I plant in compost only? ›

Growing plants in pure compost can cause problems with water retention and stability as well. When mixed with topsoil, compost works wonders with water, as it allows good drainage through heavy soil while it retains water in sandy soil. Used on its own, however, compost drains quickly and promptly dries out.

Should I use topsoil or compost for vegetable garden? ›

It's best to use topsoil wherever you're lacking soil. For example, you may need to fill in a low spot in your lawn or add as a base layer in a new garden that's missing a foundation of soil. If you use topsoil in a garden, you'd still have to add additional compost or manure to help your plants thrive.

What are the disadvantages of organic compost? ›

Drawbacks of composting by-products are cost for site preparation and equipment, the lengthy treatment period, targeting final use of compost product, and environmental issues such as odors and dust. Some investment in equipment and site preparation is required or recommended.

Is organic soil better for plants? ›

Organic matter improves overall soil health. And our plants will love that, and so will we. It is a combination of living organisms, fresh residues, and thoroughly decomposed residues.

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