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Top 4 Best Soil Amendments – An Ideal Solution For Gardeners!

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Today, some gardeners complain about their unworkable, sandy and clay soil in which very few types of vegetables or fruits can grow. Yet, the barren soil for planting and gardening can be upgraded to grow all kinds of plants more effectively.

If you have a vegetable garden, a beautiful flower bed, or a green shelf of houseplants, the best soil amendments will ensure healthy and solid growth. With that being said, how to choose an ideal one? Follow Growingherbsforbeginners.com to blow a new life into your garden!

Top 4 Best Soil Amendments Reviews

From here, we will review the top Best soil amendments and reveal which one is the best product.

RTS Home Accents Rainwater BarrelLiquid Soil Loosener - Aerator Soil Conditioner
Good Ideas IMP-L50-SAN<br /> Raw Organic Humic Fulvic Carbon - Root Hume
Good Ideas RW65-GRN Rain WizardThe Andersons Humic DG Organic Soil Amendment
Enviro World EWC-10 FreeGardenJobe’s 09365 Additive De-Acidifier

#1. Liquid Soil Loosener – Aerator Soil Conditioner – Best Overall

Liquid Soil Loosener - Aerator Soil Conditioner

  • Product dimensions: 5 x 2.25 x 8 inches
  • Item weight: 2 pounds
  • Item form: liquid
  • Coverage area: 32000 square feet

If you are an experienced gardener, Liquid Soil Loosener should not be a strange name. This is one of the best products available at a reasonable price.

The solution allows users to use it alone or with tools such as a core or mechanical aerator. It is manufactured to help promote drainage and improve liquid and water penetration. 

This easy-to-use and advanced treatment also softens the soil and clears away any impurities. All stagnant water can be well-removed thanks to the increased ventilation.

Applying the solution will also break apart colloids so that the roots can push through and establish themselves healthily and strongly. Made in the USA, the product is biodegradable, non-toxic, and safe for pets and kids. 

It can perform well in soil and vegetation, which boosts the overall environmental quality and the plants’ color. The big container can occupy up to 32000 square feet at once. 

Use the solution four weeks before planting to ensure the best results. Yet, it would be better to use it on a light or moderate rainy day only. Heavy rains will wash away the solution.


  • Easy to use 
  • Improves liquid and water penetration
  • It can be used on all grass types
  • Safe for pets and kids


  • Should not be used on a heavy rainy day

#2. Raw Organic Humic Fulvic Carbon – Root Hume – Best For Nutrients

Raw Organic Humic Fulvic Carbon - Root Hume

  • Product dimensions: 5 x 2.25 x 8 inches
  • Item weight: 2 pounds
  • Item form: liquid
  • Coverage area: 32000 square feet

Raw organic humic fulvic carbon-root hume is a perfect salvage for stressed souls. The solution is manufactured to increase fertilizer delivery and lets the plants consume all the needed nutrients. Calcium, magnesium, phosphorus, nitrogen, and potassium are a few components it provides.

This distilled liquid blend comes from the extraction of leonardite, one of the highest-quality sources of fulvic and humic acid. The product uses a patented process instead of a regular powder application to take advantage of this material fully.

You can use this drug on hardy plants, turfgrass, oranges, fruits, grass, and new seedings. It is designed to promote the growth and health of plants and roots while boosting water retention.

The solution comes in a tight container of up to 32 ounces with detailed mixing directions. You can combine four ounces of water for around 1000 square feet. It would be best to implement the drug once every two weeks.

The only problem with this product is its average packaging. It would help to store it in a dry and open space to keep the package safe and in shape.


  • Easy to use and dispense
  • Concentrated liquid carbon from the highest quality source
  • Increases cation exchange capacity
  • Can be attached to fertilizer regimens


  • Average packaging quality

#3. The Andersons Humic DG Organic Soil Amendment – Best For Small Gardens

The Andersons Humic DG Organic Soil Amendment

  • Product dimensions: 16.18 x 11.02 x 3.9 inches
  • Item weight: 11.09 pounds
  • Item form: granular
  • Coverage area: 10000 square feet

The Andersons humic DG organic soil amendment can do wonders for smaller gardening areas. Coming in a bottle of more than 11 pounds, the product can cover around 10,000 square feet at once.

This granular soil conditioner contains three main humic bases: fulvic acid, humin, and humic acids. Those components are included in building blocks for organic matters, growing microbial activities, and fostering plant development.

The product works successfully on any soil texture but best on sandy soils because the granular particles are simple to distribute and spread. Those particles are formulated and moisturized to ensure even and swift absorption into the soil.

You can use the substance on grass, shrubs, fields, and bushes, and there are detailed instructions on the packaging for different uses. Using it correctly helps improve nutrient absorption and fertilizer production. 

You will have greater root vigor and seed germination with improved plant safety and enhanced root mass. Use the product with organic farming and fertilizers for a healthy result.

Despite all the impressive features, the product comes at a higher price. Thus, consider your budget before picking one.


  • Easy to spread and distribute
  • Ensures even and swift absorption
  • It can be used on any soil
  • Comes in various sizes


  • Expensive

#4. Jobe’s 09365 Additive De-Acidifier – Best For pH Improvement

Jobe’s 09365 Additive De-Acidifier

  • Product dimensions: 4 x 7 x 13.5 inches
  • Item weight: 6 pounds
  • Item form: granules
  • Coverage area: 1000 square feet

If you struggle to improve the soil pH to let the soils have enough nutrients and minerals, you should not ignore Jobe’s 09365 additive de-acidifier. The product is available to contribute to low fertilizer supply and provide the plants with the required nutrients.

Most plants will need a pH of from six to seven. More than this level, the minerals cannot be consumed completely. The application of this solution renders the plants more accessible to the nutrients in the soil. 

This encourages your plants’ overall quality and leads to better colors and bigger blossoms. Each liquid is packed in a resealable six-pound container and ready to use and store. 

The granules are manufactured to spread uniformly and work wonders when used in the correct quantity and water. For beginners who are in the dark about the pH level of their soil, the kit comes with specific instructions on the correct amount. 

The only complaint about this is the packaging. The bag is prone to scratches and damage if left uncared. Therefore, store the product carefully to avoid unwanted damage to the granules.


  • Organic granules for increased soil alkalinity
  • Adds garden lime to raise the pH level
  • Easy to pour and spread


  • Poor packaging
  • Have a mildew smell

How To Choose The Best Soil Amendments

Types Of Soil Amendments

There are various types of soil modifications, which sometimes puzzle beginners to choose the best one. Animal-based, mineral-based, and plant-based amendments are the main products you can often come across on the market.

The first ones are manufactured to increase beneficial organisms to improve soil structure. With this type of amendment, it would be best to apply untreated animal products at least nine months before harvest and two weeks before planting.

Plus, the second type is available to correct mineral deficiencies. You can apply it several times as it doesn’t break down easily. On the other hand, plant-based amendments can be used to improve soil structure.

Yet, herbicide contamination can lead to lackluster performance and stunted growth. Therefore, it is vital to have herbicide-free amendments. 

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Types Of Soils

Each type of soil is compatible with different amendments. Clay soil is often used to make ceramics and pottery, so it comes with a high percentage of silt and clay. 

Thanks to the small and clingy particles, clay soil holds water and nutrients well. Yet, it is susceptible to compaction. This way, it curbs nutrients and moisture from reaching the plant roots and prevents the roots from penetrating the soil.

Sandy soil comprises larger and coarser particles, which drain quickly and fail to hold nutrients and moisture effectively. This type of soil appears rough and cannot hold together well. Succulents and cacti can grow best in this soil mix despite these characteristics.

Loam is another common garden soil. It is a good balance of sand, clay, silk, and organic material. Overall, this is the best soil type for gardening, moisture retention, and drainage. Loam will keep in shape even if you squeeze it.

Longevity Of The Amendments

The desired type of amendment will depend on your gardening goals. For instance, if you are looking for a method to improve the soil’s physical properties quickly, the one that decomposes rapidly will be ideal.

Conversely, the one that decomposes slowly will offer a long-lasting improvement to your soil. For a quick and long-lasting improvement, let’s pick a combination of amendments.

Soil Salinity

Some forms of manures and composts are high in salts. Thus, avoid applying those amendments to soils already high in salts or plants sensitive to salts. Maple, bean, onion, strawberry, raspberry, and viburnum are a few.

Ground leaves and sphagnum would work wonders for those landscape plants instead of manures or compost.

Soil pH Level

Soil pH indicates soil fertility and nutrition, which affects the plants’ growth and the availability of minerals and nutrients. This figure will let you know how well a plant can absorb and regulate all materials.

A pH from 6.0 to 7.0 will be ideal for most garden vegetables. At this level, microbial activity is greatest, and plant roots can access most nutrients. Yet, each plant has specific pH range preferences. Therefore, don’t forget to check the level before amending.

How To Use Soil Amendments

For green fingers, using soil amendments should not cause any difficulty. Prepare all the needed equipment and materials, then get your hands dirty. 

Gardening gloves, tiller, or garden shovel are necessary to help you make the job done easily and safely. Besides soil amendments, it would also be better to get some lime, fertilizer, and organic materials. Manure, compost, and peat moss are some recommendations.

To get started, let’s evaluate and check the health of your soil first. You can get help from the nurseries to receive an overview of your soil. The information should include pH, texture, and nutritional composition.

The tests will also recommend which type of amendments to use, the quantities, and how to correct deficiencies. You can also guess the soil quality. 

If the plants are healthy and thriving well, don’t try to fix what’s not broken. On the other hand, it would be best to have a detailed test if your plants grow yellow and look sickly. 

Before adding amendments, it’s time to adjust the soil pH. This is crucial as plants cannot take up nutrients properly if the acid levels are not in their ideal range.

If your soil test shows that the pH is off, you will need to add some lime to raise this level of sulfur to lower it. This should be completed in stages in an existing garden to avoid shocking the plants.

Don’t add more than five pounds of sulfur or lime per 100 square feet. On the contrary, rake the component, dig it into the garden tiller, and add the whole recommended amount for a new garden. 

Proper soil texture can let the roots take up enough air and moisture. Clay-type and dense soils are often too moist, making the roots drown. On the other hand, sandy soil tends to drain too quickly for the plant’s roots to absorb adequate moisture.

The best way to improve the situation is to add organic materials like peat moss and compost. Decaying organic matters allow sandy soils to retain water while making clay ones looser and get enough water and air.

There are five common forms of materials to amend your garden soil. Compost is ideal as you can use kitchen scraps and garden waste. Manure is another suggestion from stables and local farms. Yet, this one is smelly and has too much ammonia.

Peat moss is cheap but can loosen the soil effectively. It is dusty, so you should get it first. You can also work with grass clippings directly into a garden bag so that they can decompose slowly. Make sure that they are free from seeds, pesticides, and herbicides.

After this amending step, don’t forget to add nutrients to garden soils. Synthetic fertilizers are cheaper and work more quickly than an organic one. Yet, they only feed the plants instead of amending the soil.

On the contrary, organic ones release nutrients over time and offer a longer and sustained feeding. No matter which type to choose, make sure that it offers three primary nutrients: potassium, nitrogen, and phosphorus.

Frequently Asked Questions

When To Improve The Soil With Amendments?

Don’t assume that only dry soil will need amendments. Your garden needs frequent care and maintenance with an adequate mixture of minerals, organic materials, and other nutrients.

Fertility and texture contribute to good garden soil. The former combines a soil pH level and essential nutrients, while the latter refers to the soil particles’ size, soil ability to transfer water and air. 

If you have poor soil and need to improve both, you must amend your garden soil. The best time for this practice is when you first establish a garden bed.

Besides, if your plants are growing yellow and look sickly, let’s test your soil and see what it needs. Then, apply the essential components and amendments according to the instructions.

What Are Other Types Of Soil Amendments?

Besides the best soil amendments mentioned above, there is a wide range of handmade soil additives that you can choose from. Using them for your garden may sound weird. Yet, they will surely offer expected benefits for your soil.

If you use untreated and real wood in your fire pit or fireplace, the ashes remaining after the fire can improve the garden soil. However, charcoal ashes are not recommended as they are often treated with lighter fluid and chemicals.

Applying ash from burned organic materials to the top will add potassium and deter pests from the soil. Biochar, charcoal from organic materials, is also perfect for your garden.

It is made by the slow-burning of organic material at low temperatures. The additive helps retain water and nutrients while reducing the required amount of fertilizer and irritation.

Blood and bone meals may sound disturbing, but they are healthy amendments to vegetable gardens. Bone meals are great, thanks to the minerals within bones. Magnesium, calcium, and phosphorus are just a few to name.

Greensand is another great suggestion: marine sediment rich in iron, potassium, and other minerals. It works as a perfect slow-release fertilizer and is ideal for improving clay soil. 

Like greensand, seaweed is an excellent additive to soil whether harvested fresh, composted, or dried. The component provides nutrients and improves texture, aeration, and water retention in your garden.

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What Is The Best Soil Amendment For Tomatoes?

The best products to improve your soil for tomatoes are dry timed-release fertilizer, compost, and manure. Those amendments can attract earthworms, making the nutrients more accessible to your tomato plants. 

Specifically, compost offers basic nutrients and improves the soil structure, while composted manure provides minerals in all seasons. 


Soil quality is the prime determinant for the plants’ survival. Thus, it is vital to give the soil enough care and proper maintenance. One of the required soil care is to focus on soil amendments to boost your growing conditions.

The best soil amendments will maximize your efforts’ efficiency and reduce micro-farming costs. Among those products mentioned above, it is undoubted that Liquid Soil Loosener – Aerator Soil Conditioner will be our top pick thanks to its reasonable price, eco-friendliness, and easy use.

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