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
From:
$47.77 – $1,578.93
Roots Organics Terp Tea Grow
From:
$13.99 – $37.99
Advanced Nutrients Voodoo Juice
From:
$42.34 – $598.78
Stump Tea
From:
$14.95 – $39.95
Roots Organics Terp Tea Bloom
From:
$13.99 – $37.99
Roots Organics Oregonism XL
From:
$8.99 – $22.49
Roots Organics Phos Bat Guano
From:
$9.54
Great White
From:
$14.27 – $245.00
Advanced Nutrients Tarantula Liquid
From:
$42.34 – $59.88
Roots Organics Bio Force
From:
$12.95
Roots Organics Seabird Guano
From:
$9.59
Black Worm Castings
From:
$8.95 – $33.95
Roots Organics Nitro Bat Guano
From:
$11.99
Stump Tea Veg Boost
From:
$14.95 – $39.95
Roots Organics Terp Tea Microbe Charge
From:
$29.99
Roots Organics Terp Tea Bloom Booster
From:
$27.99
Stump Tea Sweetener
From:
$14.95 – $39.95
Vermiculite - 8 Quart Bag
$5.49
FoxFarm Bush Doctor Microbe Brew
From:
$23.96 – $78.71
Pahroc Giant Perlite #3 - 1.5 Cubic Feet
$23.95
Happy Frog Soil Conditioner 3.0 Cubic Feet
From:
$20.95
Pelletized Peruvian Sea Bird Guano 10-10-1
From:
$7.40 – $30.50
Roots Organics Fish Protein
From:
$21.99
Perlite - 8 Quart Bag
$7.95
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