Soil Amendments & Conditioners

While pest and disease control, fertilizing, and proper planting techniques are key parts to your landscape and garden success, the quality of your soil can greatly impact the health of your plants more than any other factor. Doing some garden soil preparation can save you a lot of time and bring you more healthy plants. 

1-24 of 40
4 out of 5 stars (12)
$35.85
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A water surfactant that holds water vapor in the plants that reduces watering by up to 50% and improves soil penetration.
5 out of 5 stars (8)
$34.92
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Organic soil amendment to provide nutrients to your plants. Comes in a 50 lb bag.
4 out of 5 stars (12)
$23.96
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Multiple sizes available
A soil conditioner formulated with 90% Sulfur to create acidic soil conditions for acid loving ornamentals.
5 out of 5 stars (5)
$20.91
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Helps correct chlorosis and prevent yellowing of foliage and faded-out look in your lawns, shrubs and other plants caused by iron deficiency.
3 out of 5 stars (4)
$35.78
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A dust-free limestone pellet that helps neutralize soil acidity while also supplying essential calcium and magnesium.
5 out of 5 stars (2)
$20.76
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Multiple sizes available
This acidifies the soil to lower the pH for a acid soil condition for Azaleas, Rhododendrons and Gardenias.
5 out of 5 stars (1)
$21.05
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A soil acidifier that has all organic ingredients that acidifies or lowers the pH of the soil for Hydrangeas and Blueberries.
5 out of 5 stars (2)
$35.75
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An all-natural soil conditioner that permanently enhances the structure of any soil.
$17.68
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A soil conditioner of Dolomite Lime to correct the soil acidity for growing lawns, ornamental plants and vegetables.
5 out of 5 stars (1)
$18.29
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Multiple sizes available
A special formula that helps loosen compacted soil while promoting root growth.
5 out of 5 stars (1)
$19.85
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Multiple sizes available
A lime that corrects soil acidity for shrubs, flowers, vegetables, lawns and house plants.
5 out of 5 stars (2)
$19.31
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Multiple sizes available
A granular soil amendment that corrects yellowing of plants and grasses to green fast.
5 out of 5 stars (1)
$6.72
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Multiple sizes available
Soil Moist stores water for plants and releases water as needed. Saves up to 50% in watering!
5 out of 5 stars (2)
$17.02
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An organic lime supplement, formulated with 100 percent organic ingredients that contains no fillers and sledges.
2.5 out of 5 stars (2)
$21.36
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A unique formula that helps correct soil alkalinity and establishes an acid soil condition.
5 out of 5 stars (1)
$18.49
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Multiple sizes available
A highly effective soil conditioner that helps boost nutrients, the effectiveness of fertilizer, and lessens weeds and moss on lawns, gardens, and ornamental beds.
4.5 out of 5 stars (18)
$17.76
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Multiple sizes available
A natural and organic plant source of humic acid to enrich the soil indoor plants to outdoor lawn and gardens.
3 out of 5 stars (2)
$25.80
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Multiple sizes available
A mineral supplement that will quickly turn plants from yellow to green, and is great for use in lawns, trees, flowers, shrubs, and vegetables.
$22.01
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A soil amendment that lowers the pH of the soil and have it become more acidic for Azaleas, Gardenias, Rhododendron and Hydrangeas.
$27.37
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A plant supplement that turns plants from yellow to green and promotes a darker green color on lawns, ornamental trees and shrubs.
2 out of 5 stars (1)
$36.50
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An organic and pH-balanced soil media designed to promote optimal seed germination and enhance root development.
5 out of 5 stars (1)
$20.73
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An organic soil conditioner that promotes root growth and helps loosen clay soils for gardens, lawns and shrubs.
$19.74
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An organic potting mix made for cactus but may also be used for palm and citrus plants.
$17.62
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An all-natural and organic soil mix for orchids and other epiphytic plants.

Soil Amendments

Soil amendments, also called soil conditioners, are materials added to your soil that aim to improve aspects of your soil, like water retention, permeability, drainage, aeration, and structure. Your soil should be able to support the roots of your plants while providing the optimal environment for growth. Soil amendments are thoroughly mixed into the soil, not laid on top like mulch. 

Types of Soil Amendments & Conditioners

The end results you’re looking for will determine which type of soil amendment you choose. Organic soil amendments include sphagnum peat, wood chips, grass clippings, straw, compost, manure, biosolids, sawdust, and wood ash. Inorganic soil amendments are manmade or mined, and include vermiculite, perlite, pea gravel, and sand. Organic products have the added benefit of containing nutrients and serve as a food source for beneficial fungi, bacteria, and earthworms, and are the best soil amendments for vegetable gardens. 

Using Soil Amendments 

Before choosing something to add to improve your soil, you should first assess your soil’s condition and research before adding anything to your soil. Soil testing can help you determine what you soil needs in order to better support plant growth. You can order soil tests, which will tell you the current pH, levels of nutrients (phosphorus, potassium, calcium, magnesium, zinc, manganese), and any fertilizer recommendations. These tests can make it clearer on the amendments you might need for your soil. 

 

Along with a soil test, you need to diagnose your soil as heavy (clay-based) or light (sand-based) because certain combinations of soils and amendments can make your soil worse. For example, difficult clay soils need to be porous, permeability, aeration, and drainage and you could use peat, wood chips, tree bark, or straw; adding sand to clay can make it even more compacted, similar to concrete. Sandy soils need to be able to hold water and nutrients and benefit from decomposed organic materials.

See also: Lawn & Garden Pest Control

 

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