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. 

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4.5 out of 5 stars (38)
$79.98
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A liquid limestone that quickly changes the soils pH level as needed in agricultural or turf-grass applications.
4 out of 5 stars (10)
$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.
4.5 out of 5 stars (11)
$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.
4.5 out of 5 stars (3)
$87.11
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A specially formulated soil conditioner that helps improve the health and vitality of your soil.
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 (3)
$76.55
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A homogeneous dispersing granule formula that delivers available sulfur, calcium, and Humate to a wide variety of vegetable, field and horticultural crops.
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 (4)
$122.37
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A professional fully chelated EDDHA iron that prevents iron chlorosis by maintaining and protecting iron availability in the most challenging soils that are alkaline or calcareous.
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.
5 out of 5 stars (7)
$57.45
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Multiple sizes available
A patented root zone moisture managment technology that effectively reduces overall watering requirements by 50%.
$84.84
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A 10% fully chelated DTPA Iron and water-soluble manganese combination that helps correct specific mineral deficiencies in slightly acid to slightly alkaline soil.
5 out of 5 stars (2)
$92.82
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Multiple sizes available
A water soluble chelated micro-nutrients fertilizer that is compatible with fertilizers and pesticides for vegetable crops to golf courses.
$17.68
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A soil conditioner of Dolomite Lime to correct the soil acidity for growing lawns, ornamental plants and vegetables.
4 out of 5 stars (1)
$177.85
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Soaker Plus is a non-ionic, low foam, wetting agent that penetrates the soil to improve drying soils and corrects water repellent problems.
5 out of 5 stars (1)
$50.61
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An all-natural and organic sphagnum peat moss soil amendment and ideal for organic gardening and production.
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$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.
4 out of 5 stars (1)
$153.21
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A specialized product in root zone moisture management that converts soil moisture vapor into plant-usable water droplets.
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.

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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