Garden Soil Amendments

National Hydro Group is your online source for Garden Soil Amendments. If you cant find the Garden Soil Amendments that meet your needs please give us a ring or send a quick email so we can help you find exactly what you're looking for.
Down To Earth Greensand - 6 lb-NWGSupply.com
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$10.69
$10.50

Down To Earth Greensand - 6 lb

Down To Earth

Greensand has been used as a soil amendment and conditioner since the early 1700s. Naturally occurring in marine sedimentary deposits, our Greensan...

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$10.69
$10.50
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Garden Gypsum, 6 lb-NWGSupply.com
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$8.49
$8.30

Garden Gypsum, 6 lb

Espoma

Espoma’s Garden Gypsum loosens heavy clay soils and helps cure “turf burns” from ice-melters. This soil amendment is pelletized for easy application.

$8.49
$8.30
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Down To Earth Langbeinite (Sul-Po-Mag) - 5 lb-NWGSupply.com
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$10.95
$9.93

Down To Earth Langbeinite (Sul-Po-Mag) - 5 lb

Down To Earth

A unique 3-in-1 combination of Potassium, Magnesium and Sulfur, Langbeinite is a naturally occurring source of these three vital plant nutrients. P...

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$10.95
$9.93
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Roots Organics Big Worm 1 Cu Ft-NWGSupply.com
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$55.95
$31.99

Roots Organics Big Worm 1 Cu Ft

Roots Organics

Roots Organics Premium Worm Castings is a distinctive natural soil amendment. Our worms are carefully tended and fed an unparalleled blend of organ...

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$55.95
$31.99
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Micronized Azomite, 44 lb-NWGSupply.com
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$46.00
$42.95

Micronized Azomite, 44 lb

Azomite

Azomite is a natural mineral product that has been mined in Utah for over 60 years. Containing a broad spectrum of over 70 metabolically active min...

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$46.00
$42.95
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Rock Phosphate, 7.25 lb-NWGSupply.com
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$11.99
$11.42

Rock Phosphate, 7.25 lb

Espoma

Rock Phosphate boosts the soil's phosphorus level while serving as a great source of calcium and essential trace elements. This slow-release fertil...

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$11.99
$11.42
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Save 23%
$13.89
$10.74

Vermiculite 8 Qt

Espoma

• Vermiculite• For improving heavy soils• Helps loosen heavy soils and prevents compaction• Aerates soil and promotes root growth

$13.89
$10.74
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Down To Earth Feather Meal - 5 lb-NWGSupply.com
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$11.49
$11.33

Down To Earth Feather Meal - 5 lb

Down To Earth

Feather Meal is a great source of slow release Nitrogen that is perfect for heavy feeders like corn, cole crops and leafy green vegetables. Incorpo...

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$11.49
$11.33
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Down To Earth Alfalfa Meal - 5 lb-NWGSupply.com
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$8.19
$8.07

Down To Earth Alfalfa Meal - 5 lb

Down To Earth

An excellent soil conditioner, Alfalfa Meal is a rich source of trace elements and natural growth stimulants. Recommended for all flowering shrubs ...

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$8.19
$8.07
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Azomite Pelletized Trace Minerals, 10 lbs-NWGSupply.com
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$22.95
$19.28
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Greensand, 7.5 lb-NWGSupply.com
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$13.89

Greensand, 7.5 lb

Espoma

Greensand turns dense, heavy clay into manageable soil. Mined from deposits in the U.S., Greensand is a naturally-occurring iron-potassium silicate...

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$13.89
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Garden Lime, 6.75 lb-NWGSupply.com
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$4.49
$4.42

Garden Lime, 6.75 lb

Espoma

Garden Lime is a great aid when adjusting the pH of excessively acidic soils. Much safer than hydrated lime, this soil amendment is pelletized for ...

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$4.49
$4.42
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Citrus-tone, 8 lb-NWGSupply.com
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$12.99
$12.47

Citrus-tone, 8 lb

Espoma

Great for citrus, avocados and more, Citrus-tone® is the result of natural organics expertise combined with recommendations from leading research u...

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$12.99
$12.47
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Down To Earth Rose & Flower Mix - 6 lb-NWGSupply.com
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$10.95
$9.56

Down To Earth Rose & Flower Mix - 6 lb

Down To Earth

A special fertilizer blend that provides ample nitrogen for vigorous growth, extra Phosphorous for beautiful blooms and Potassium and trace element...

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$10.95
$9.56
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Down To Earth Oyster Shell - 6 lb-NWGSupply.com
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$8.19
$8.07

Down To Earth Oyster Shell - 6 lb

Down To Earth

Oyster Shell flour is an all natural source of high quality Calcium that is ground into varying sizes to ensure an immediate and sustained release ...

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$8.19
$8.07
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Down To Earth Neem Seed Meal - 5 lb-NWGSupply.com
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$15.95
$14.37

Down To Earth Neem Seed Meal - 5 lb

Down To Earth

Neem Seed Meal is produced during the extraction of oil from the seed of the Indian Neem tree (Azadiracta indica). It is an excellent way to streng...

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$15.95
$14.37
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Down To Earth Kelp Meal - 5 lb-NWGSupply.com
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$20.39
$18.83

Down To Earth Kelp Meal - 5 lb

Down To Earth

Down To Earth Kelp Meal is pure Ascophyllum nodosum seaweed from the clean, cold waters of the North Atlantic Ocean. Hand-harvested, carefully drie...

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$20.39
$18.83
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Down To Earth Granular Humic Acid - 5 lb-NWGSupply.com
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$8.95
$8.25

Down To Earth Granular Humic Acid - 5 lb

Down To Earth

A highly concentrated source of humic acids ideal for use on fields, turf and vegetable gardens. Derived from the ancient remains of decomposed org...

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$8.95
$8.25
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Down To Earth High Nitrogen Bat Guano - 10 lb-NWGSupply.com
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$33.39
$28.00

Down To Earth High Nitrogen Bat Guano - 10 lb

Down To Earth

The undisputed champion of organic fertilizers, Bat Guano is rich in readily available Nitrogen, Phosphorus and micronutrients and provides essenti...

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$33.39
$28.00
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Down To Earth Fish Bone Meal - 6 lb-NWGSupply.com
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$9.95
$8.97

Down To Earth Fish Bone Meal - 6 lb

Down To Earth

Fish Bone Meal is a marine based alternative to traditional steamed Bone Meal and is wonderful for all flowering plants, trees and shrubs. A great ...

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$9.95
$8.97
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Down To Earth Acid Mix - 6 lb-NWGSupply.com
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$10.95
$9.56

Down To Earth Acid Mix - 6 lb

Down To Earth

A fertilizer blended specially for acid soil loving plants like rhododendrons, azaleas, hydrangeas, evergreen trees and shrubs, blueberries, raspbe...

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$10.95
$9.56
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Unco Industries Wiggle Worm Earthworm Castings, 15 lbs-NWGSupply.com
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$14.95
$10.35

Unco Industries Wiggle Worm Earthworm Castings, 15 lbs

Unco Industries

• Unique, 100% bio-organic mix• Contains microbes cultured for fast, healthy composting• Includes heat active varieties, used to speed the decompos...

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$14.95
$10.35
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Big Worm Worm Castings 1 cf-NWGSupply.com
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$54.95
$36.12

Big Worm Worm Castings 1 cf

Roots Organics

Roots Organics Big Worm pure castings are a distinctive natural potting soil amendment. Their worms are carefully tended and fed an unparalleled bl...

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$54.95
$36.12
Save 34%
PRO-MIX PUR Mycorrhizae Powder, 5.3 lbs-NWGSupply.com
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$119.99
$117.55
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