Soil Amendments

Soil Amendments

Improve your garden with soil amendments from HTG Supply! With popular brands including Organic Mechanics, Growstone and Down to Earth, our selection of soil amendments will allow you to give your plants the best chance for maximum growth!

We offer both complete garden soil and soil amendments which allow you to directly treat your soil. Shop today!

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Newest Soil Amendments

Most Popular in Soil Amendments

Mammoth P
Mammoth P
Starting at:
$598.22
Roots Organics Terp Tea Grow
Roots Organics Terp Tea Grow
Starting at:
$37.99
Stump Tea
Stump Tea
Starting at:
$39.95
Advanced Nutrients Voodoo Juice
Advanced Nutrients Voodoo Juice
Starting at:
$177.91
Roots Organics Terp Tea Bloom
Roots Organics Terp Tea Bloom
Starting at:
$37.99
Roots Organics Oregonism XL
Roots Organics Oregonism XL
Starting at:
$22.49
Great White
Great White
Starting at:
$245.00
Roots Organics Phos Bat Guano
Roots Organics Phos Bat Guano
Starting at:
$9.54
Advanced Nutrients Tarantula Liquid
Advanced Nutrients Tarantula Liquid
Starting at:
$59.88
Roots Organics Seabird Guano
Roots Organics Seabird Guano
Starting at:
$9.59
Black Worm Castings
Black Worm Castings
Starting at:
$33.95
Roots Organics Bio Force
Roots Organics Bio Force
$1,399.95
Roots Organics Nitro Bat Guano
Roots Organics Nitro Bat Guano
Starting at:
$11.99
Roots Organics Terp Tea Microbe Charge
Roots Organics Terp Tea Microbe Charge
$29.99
Terp Tea Bloom Booster 3lb
Roots Organics Terp Tea Bloom Booster
Starting at:
$27.99
Black Gold Vermiculite 8 Quart Bag
Vermiculite - 8 Quart Bag
$5.49
Stump Tea Veg Boost
Stump Tea Veg Boost
Starting at:
$39.95
Stump Tea Sweetener
Stump Tea Sweetener
Starting at:
$39.95
Happy Frog Soil Conditioner 3.0 Cubic Feet
Happy Frog Soil Conditioner 3.0 Cubic Feet
$26.00
FoxFarm Bush Doctor Microbe Brew
FoxFarm Bush Doctor Microbe Brew
Starting at:
$78.71
Pelletized Peruvian Sea Bird Guano 10-10-1
Pelletized Peruvian Sea Bird Guano 10-10-1
Starting at:
$30.50
Roots Organics Fish Protein
Roots Organics Fish Protein
$120.99
Pahroc Perlite Number 3 - 1.5 cuft
Pahroc Giant Perlite #3 - 1.5 Cubic Feet
$17.95
Black Gold Perlite 8 Quart Bag
Perlite - 8 Quart Bag
$7.95

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