- Understanding Organic Fertilizer<\/a><\/li>
- How Organic Fertilizer Works<\/a><\/li>
- Benefits of Organic Fertilizer<\/a><\/li>
- Common Types of Organic Fertilizer<\/a><\/li>
- Mixed Organic Fertilizers<\/a><\/li>
- Tips for Applying Organic Fertilizer<\/a><\/li>
- FAQ<\/a><\/li><\/ul> \t\t\t<\/div> \t\t<\/div><\/div>
Understanding Organic Fertilizer<\/h2>
Organic fertilizers are natural materials you can add to your lawn or garden to feed the plants with essential nutrients and improve the soil quality. Well-known examples are compost, humic acid, bone meal, kelp, and manure.<\/p>
These natural growth enhancers are made from plants, manure, animal by-products, mined minerals, or a mixture of these materials. Unlike synthetic fertilizers, organic products undergo minimal processing and work with<\/em> soil microorganisms to nourish plants sustainably. <\/p>
Food for Your Plants<\/h3>
What is fertilizer if not food for your plants? And according to Miller, the organic type is the healthier, better food to go for. \u201cThink of it like eating whole foods instead of processed meals \u2014 the long-term benefits are undeniable.\u201d<\/p>
Organic fertilizers improve soil quality and feed beneficial fungi and bacteria, while synthetic fertilizers damage the soil structure and harm the microbiome. <\/p>
Unlike conventional fertilizers, which contain soluble nutrients such as ammonium sulfate or urea and are quickly absorbed by plants, organic fertilizers work more slowly. They provide long-term balanced feeding without the risk of fertilizer burn or forced growth.<\/p>
Organic fertilizers also contain a wider range of nutrients, including:<\/p>
- Secondary macronutrients<\/strong> (calcium, magnesium, and sulfur)<\/li>
- Micronutrients<\/strong> (e.g., iron, copper, and zinc). <\/li> <\/ul>
Their complex structure prevents and treats subtle soil deficiencies that are often hard to detect.<\/p>
On the downside, they\u2019re bulkier and contain lower concentrations of nitrogen, phosphorus, and potassium than conventional fertilizers. For example, blood meal, one of the highest in nitrogen, has a 12-0-0 NPK ratio (12% nitrogen), while chemical fertilizers can contain up to 40% nitrogen. <\/p>
This means you\u2019ll often need to apply a larger amount of organic product to achieve 1 pound of nitrogen per 1,000 square feet, a common application rate for turfgrasses. Hence, the price problem \u2014 organic fertilizers tend to be more expensive than conventional ones. <\/p>
Pro Tip:<\/strong> Look for organic fertilizers made with local materials. They\u2019re usually cheaper.<\/p>
See Related:<\/strong> <\/p>
- How Much Does Lawn Fertilization Cost in 2025?<\/a><\/li> <\/ul>
How Organic Fertilizer Works<\/h2>
Unlike synthetic fertilizers, which supply nutrients in a water-soluble form that plants can quickly access, organic products must first be \u201cprocessed\u201d by soil microorganisms. <\/p>
![\"illustration](\"https:\/\/www.lawnstarter.com\/blog\/wp-content\/uploads\/2016\/07\/LawnLove-Fertilizer-illustration.jpg\")
Infographic by Juan Rodriguez<\/figcaption><\/figure> Organic fertilizers contain nutrients in their organic form (e.g., proteins) that plants can\u2019t absorb. First, the natural soil factory needs to decompose them into smaller pieces. Experts call this process mineralization. Here\u2019s what happens: <\/p>
- You spread organic fertilizer and mix it with the topsoil.<\/li>
- Soil fungi and bacteria start decomposing the fertilizer.<\/li>
- They convert the organic matter into basic elements plants can use (e.g. organic nitrogen into ammonium).<\/li>
- Plants absorb the nutrients from the soil.<\/li>
- Beneficial organisms also feed on nutrients and multiply.<\/li> <\/ul>
One aspect Miller underlines is that weather plays an important part in how organic fertilizers behave and the results they provide. \u201cOrganic fertilizers depend on microbial activity in the soil to break down and release nutrients. When temperatures drop below 50 F, microbial activity slows down, making organic fertilizers less effective,\u201d says Miller.<\/p>
That\u2019s why synthetic fertilizers, which \u201crelease nutrients regardless of temperature,\u201d he notes, might be a better choice late in the season. <\/p>
During the warm season, however, organic fertilizers are exactly what you need. \u201cIn hot summer conditions, synthetics can be tricky \u2014 too much can burn the grass, while organics offer a gentler, slow-release option,\u201d says Miller.<\/p>
Benefits of Organic Fertilizer<\/h2>
![\"Fertilizing](\"https:\/\/www.lawnstarter.com\/blog\/wp-content\/uploads\/2015\/03\/fertilizing-lawn.jpeg\")
Photo Credit: Khaligo<\/a> \/ Adobe Stock Free \/ License<\/a><\/figcaption><\/figure> Plants can\u2019t tell if nutrients come from organic or chemical fertilizers. But the ecosystem they live in can. Organic fertilizers are the closest to Mother Nature\u2019s way of keeping the life cycle going and have long-term benefits for the soil, plants, and the environment.<\/p>
Soil Enhancement<\/h3>
Natural plant food offers benefits that extend beyond supporting the current season\u2019s growth, according to Negodenko. \u201cOrganic fertilizers release nutrients slowly over time, feeding microbial life in the soil and improving its structure, water retention, and nutrient retention,\u201d he says.<\/p>
Natural fertilizers are rich in organic matter, which binds soil particles together into aggregates and gives the soil a crumbly structure \u2014 the telltale look of healthy, organic soils. Loose, crumbly soil has good drainage and aeration, allows the roots to grow deeper, and is better able to hold moisture and nutrients.<\/p>
Organic matter is the main source of energy for soil microbes. When it\u2019s plenty, they multiply and grow in diversity, creating a rich soil microbiome that helps plants access nutrients more easily and is less likely to be dominated by plant pathogens.<\/p>
See Related:<\/strong> <\/p>
- What are the Different Types of Soil Amendments for Turfgrass Lawns?<\/a><\/li>
- How to Fix Compacted Soil<\/a><\/li> <\/ul>
Environmentally Safe<\/h3>
Organic fertilizers release nutrients more slowly than synthetic fertilizers, reducing the risk of runoff into waterways, rivers, and lakes. <\/p>
That happens because organic fertilizers are less water-soluble \u2014 they don\u2019t dissolve easily in water, as conventional fertilizers do. Instead, organic products rely on microbial activity to release nutrients in the soil and so are less prone to leaching during heavy rain or overwatering. <\/p>
You can, however, pollute the environment if you accidentally drop fertilizer into a lake or a river or wash spilled fertilizer from your driveway into the waterways. <\/p>
Long-Lasting Results<\/h3>
Repeated applications of organic fertilizers gradually turn the soil into a nutrient bank that can feed the plants for a long time.<\/p>
Biological plant food adds organic matter to the soil, which acts like a sticky sponge for nutrients. Once microbes decompose the fertilizer into plant-available nutrients, what is not used by plants sticks to the organic matter instead of being washed away by irrigation or rain. It stays there until the plants need food again. <\/p>
Negodenko says that is the opposite of the synthetic fertilizer effect. \u201cWhile synthetic fertilizers can provide immediate “food” to a lawn, they only deplete the soil and create nutrient imbalances.\u201d But most organic fertilizers are slow-release, providing nutrients for plants for several months after the application. <\/p>
Common Types of Organic Fertilizer<\/h2>
![\"person](\"https:\/\/www.lawnstarter.com\/blog\/wp-content\/uploads\/2025\/02\/manure.jpeg\")
Photo Credit: 994yellow<\/a> \/ Adobe Stock Free \/ License<\/a><\/figcaption><\/figure> There are two main types of organic fertilizers: plant-based and animal-based. This section discusses what each type of fertilizer provides and offers a few tips on choosing between the two.<\/p>
Plant-Based Organic Fertilizers<\/h3>
Organic fertilizers made from plants are safer than animal-based fertilizers because they are free of worms, viruses, and other pathogens that sometimes end up in manures. If you\u2019re choosing a product to fertilize edible plants, plant-derived fertilizer is a safer choice.<\/p>
If you\u2019re growing organic produce, look for certified organic fertilizers with the OMRI (Organic Materials Review Institute) label. Plant-based fertilizers can carry pesticide and herbicide residues if the plants used as raw material have been heavily treated.<\/p>
- How to Fix Compacted Soil<\/a><\/li> <\/ul>
- What are the Different Types of Soil Amendments for Turfgrass Lawns?<\/a><\/li>
- Micronutrients<\/strong> (e.g., iron, copper, and zinc). <\/li> <\/ul>
- How Organic Fertilizer Works<\/a><\/li>
![\"person](\"https:\/\/www.lawnstarter.com\/blog\/wp-content\/uploads\/2025\/02\/compost.jpg\")