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Amendments
Need to improve your soil’s drainage and density or adjust its acid-alkaline balance? Need to provide your roses, azaleas or tomatoes specific minerals or other nutrients? Whether you’re improving your soil from scratch or adding just the right nutrients to encourage blooming, we have the organic soil amendments your growing requires.
Need advice? Our Soils Blog provides the ideas, information and practical experience you need to get the job done right.
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Azomite (Granular)
Use for large blooms, strong plants and nutritionally dense greens and vegetables.
$9.50$4.98 -
Azomite (0-0-0.2)
This natural re-mineralizer helps grow stronger plants and better tasting crops.
$29.95$17.35 -
Humic Acids (Granular)
Harvested from a huge deposit of decomposed plant life from millions of years ago.
$9.50$4.39 -
Kelp Meal (1-0.5-2)
Derived from Norwegian seaweed and infused with beneficial microbes.
$9.95$5.15 -
Alfalfa Meal (2-1-2)
Add to flower and vegetable gardens to boost plant growth and blooms.
$9.95$5.15 -
Alfalfa Meal (Organic)
Derived from sun-cured, non-genetically modified alfalfa that is freshly milled.
$9.50$4.71 -
Alfalfa Pellets
Contains nitrogen (5%) and triacontanol, a natural plant growth promoter.
$24.95$16.25 -
Ancient Forest Humus
Contains pure, naturally decomposed forest humus — NO fillers or additives.
$16.95$8.40 -
Basalt Powder
Releases essential minerals and trace elements that plants need to flourish.
$34.95$21.70 -
Big Worm
Contains NO chemicals, NO fillers and NO tricks — just natural goodness!
$55.95$25.95 -
Bio-Char
Black Owl Biochar contains no less than 70% premium carbon for exceptional results.
$39.95$21.50 -
Blood Meal (13-0-0)
A strong source of slow release, organic nitrogen for ALL types of plants.
$12.50$6.67 -
Bone Meal (2-14-0)
A very strong source of phosphorus and contains up to 24% calcium.
$59.95$45.15 -
Bone Meal (3-15-0)
Promotes superior roots and fruit development in ALL flowering plants.
$9.95$4.41 -
Bu’s Blend Biodynamic
Contains NO GMOs, pathogens, growth hormones, or synthetic anything!
$19.95$13.35 -
BuffaLoam Compost
Contains no toxic chemicals, artificial ingredients, unknown fillers or waste products.
$15.95$8.95 -
Camelina Meal (6-1-1)
Also known as wild flax, Camelina Meal contains 6% N for healthy plant growth.
$9.95$4.50 -
Charcoal
Perfect for terrariums! Charcoal removes odors and improves aeration.
$7.95$2.97 -
Coco Fiber
Soak compressed bale in water to expand. One 5-kilo bale makes up to 16 gallons.
$11.95$6.12 -
Cottonseed Meal
An excellent source of slow-release nitrogen, phosphorus and potash.
$49.95$30.90 -
Crab Meal (4-3-0)
Crops love this by-product of the Pacific Northwest Dungeness crab harvest.
$12.95$6.62 -
Dolomite Lime
Raises pH in acidic soils and is an excellent source of calcium and magnesium.
$24.50$12.00 -
Dr. Iron
Use to correct iron deficiency which causes yellowing in plants and turf.
$14.95$7.50 -
Dried Blood (13-0-0)
Used for years by growers as a powerful, slow release source of nitrogen (13%).
$76.95$56.15 -
Earthworm Castings
100% Pure. You need only use a small amount around vegetables and flowers.
$25.95$14.25 -
Elemental Sulfur
Lowers pH in alkaline soils and is used around acid loving plants such as azaleas.
$24.95$12.45 -
Feather Meal (12-0-0)
Made from hydrolyzed and ground feathers collected from the poultry industry.
$12.95$6.62 -
Fish Bone Meal (3-18-0)
An excellent source of slow release phosphorus and calcium, plus trace elements.
$9.95$5.15 -
Fish Bone Meal (4-20-0)
This marine-based alternative is wonderful for all flowering plants, trees and shrubs.
$54.95$40.20 -
Fish Meal (9-4.5-0)
Uniquely processed to retain maximum nutrition without using synthetic chemicals.
$94.95$68.55 -
Fossil Shell Flour
Perma-Guard is a pure, food grade diatomaceous earth (fresh water type).
$39.95$25.90 -
Garden Compost
Provides organic matter and natural nutrients for flowers and vegetables.
$8.50$3.46 -
Garden Gypsum
While not a fertilizer, Gypsum can help increase the productivity of your plants.
$9.95$4.78 -
Garden Lime
Safer to use than hydrated types, this pelletized dolomitic limestone is easy to apply.
$6.95$2.37 -
Garden Manure (4-2-2)
Derived from poultry waste that's been dehydrated to provide higher NPK.
$5.95$3.44 -
Glacial Rock Dust
Adds trace minerals to depleted gardens and improves plant health.
$34.95$21.50 -
Greensand
Contains iron, magnesium, silica and as many as 30 other trace minerals.
$11.95$6.14 -
Greensand (0-0-0.1)
Supplies potassium (K), an essential nutrient that promotes plant hardiness.
$14.95$9.65 -
Greensand (0-0-0.2)
Contains slow-release potash and a large array of trace minerals. Sold in 44 lb bags.
$52.95$32.80 -
Gypsum
Loosens heavy clay soils while adding calcium and sulfur in a readily available form.
$21.95$14.20 -
Insect Frass (2-2-2)
A 100% vegan plant food made from the excrement and exoskeletons of insects.
$26.95$13.50 -
Karanja Cake (44lb)
Rich in NPK and micro-nutrients, yet completely biodegradable — no residues!
$104.95$55.00 -
Kelp Meal (1-0-2)
An excellent source of micronutrients and beneficial plant growth promoters.
$104.95$78.35 -
Langbeinite/ K-Mag (0-0-22)
Use for plants that need a nutritional boost without a high NPK load.
$11.50$5.55 -
Mega Chunk
The exact same product as Foxfarm's Big & Chunky perlite — only cheaper!
$49.95$36.95 -
Neem Cake
Neem cake is what remains after the seeds have been processed for oil.
$62.95$36.95 -
Neem Meal (6-1-2)
Stimulates microbial activity and is excellent for boosting root systems and root crops.
$15.95$8.01 -
Oly Fish Compost
No fishy odor! Slow-release nutrients grow stronger, more nutritious vegetables.
$19.95$12.45 -
Organic Compost
Contains NO sewage sludge or bio-solids that are often found in commercial brands.
$19.95$14.95 -
Oyster Shell
This crushed mix ensures rapid and long-term release of calcium for stronger plants.
$8.50$4.29 -
Oyster Shell Lime
Contains up to 39% calcium (Ca), plus many other important plant nutrients.
$18.95$13.05 -
Perlite
Screened for uniformity, this sterile medium is prized for its outstanding characteristics.
$6.50$2.75 -
PLANT!T Perlite
Super coarse-grade contains lots of nooks and crannies for water and air space.
$31.95$24.95 -
Precision Perlite
Perfect for starting seeds, rooting cuttings or adding to any growing medium.
$37.95$16.65 -
Pumice
Formed from molten lava, pumice will improve aeration and drainage for plant roots.
$15.95$7.65 -
Rock Phosphate
Once applied, rock phosphate will remain until used by plants – NO leaching!
$32.95$23.50 -
Rock Phosphate (0-3-0)
A long-lasting source of phosphorous — ideal for flowering trees and shrubs!
$9.50$4.88 -
Secrets to Great Soil
Includes over 300 illustrations and at-a-glance charts to ensure a bountiful harvest.
$19.95$10.97 -
Shellfish Fertilizer
A natural source of calcium (12.0%), nitrogen (4.0%) and many trace minerals.
$47.95$34.40 -
SHITZ & WIGGLES
Savvy growers know redworm castings to be rich in nutrients and beneficial microbes.
$27.95$11.55 -
Shrimp Meal (6-6-0)
Ground shells from Pacific Northwest crustaceans offer an excellent source of chitin.
$8.50$3.91 -
Silica (Si)
Use silica (Si) to build extra strong roots, stems and foliage. Made in Montana.
$9.95$5.00 -
Soil Moist
These super absorbent “crystals” trap moisture that would normally be lost.
$12.95$6.25 -
Soybean Meal (7-1-2)
A high-nutrient lift that’s derived from organically grown, GMO-free soybeans.
$14.95$8.12 -
Sphagnum Peat Moss
Perfect for acid-loving plants like azaleas, rhododendrons, roses and conifers.
$19.50$11.45 -
Sul-Po-Mag (0-0-22)
Also known as sulfate of potash-magnesia, Sul-Po-Mag contains 22% potash (K).
$49.95$35.00 -
Sup’r Green (3-2-2)
Sup’r Green provides over 5 times more plant food value than steer manure.
$14.95$5.26 -
Vermiculite (8qt)
Use to root cuttings or to offer any plant more air capacity for healthy growth.
$6.50$2.50 -
Washed Sand
A beautiful option to top-dress potted plants or small xeriscape gardens.
$6.50$2.95