Soil Additives

87 products

  • Espoma Organic Perlite 1 Cubic Ft

    Espoma Espoma Organic Perlite 1 Cubic Ft

    In stock

    For Seed Starting or blending a custom potting mix.Helps loosen heavy soils and prevents compaction

    In stock

    $18.99

  • SunBulb® Better-Gro® Long Fibered Sphagnum Moss - 4.39L

    BetterGro SunBulb® Better-Gro® Long Fibered Sphagnum Moss - 4.39L

    In stock

     Easy to use medium that holds moisture and fertilizer for growing plants. Excellent for lining wire baskets, mounting stag horns or bromeliads and lining and filling wire forms of topiary. 

    In stock

    $13.99

  • Black Gold Perlite 8QT

    Black Gold Black Gold Perlite 8QT

    In stock

    Perlite, Use to improve aeration and drainage, Moisture and nutrient retention capabilities and lightweight characteristics make it an excellent sterile medium for starting seeds and rooting cuttings, Will not degrade over time, Great for starting seeds, root cuttings, or store bulbs, 8 quarts.

    In stock

    $11.99

  • Build A Soil Canadian Sphagnum Peat Moss - 1 Cubic Foot Fluffed Peat Moss

    Build-A-Soil Build A Soil Canadian Sphagnum Peat Moss - 1 Cubic Foot Fluffed Peat Moss

    In stock

     Peat moss has been used by gardeners for a very long time and changed gardening forever. Peat Moss is used to retain water in plants and also does a fantastic job of keeping nutrients available instead of leaching into the soil. 

    In stock

    $38.00

  • Build A Soil Certified Organic Straw Mulch - 2gal

    Build-A-Soil Build A Soil Certified Organic Straw Mulch - 2gal

    In stock

    Barley straw mulch for a small garden, in a 2 gal size. Coverage For reference, 1 cubic foot of straw doesn't weigh much but will easily mulch 6-12 plants, depending on the depth of mulch and the size of the container. The straw is compressed when baled and is not fluffed up before packaging, so 1 bag holds more than you might think. Good to know Expect some foreign dried plant material, as there always is with any straw bales.

    In stock

    $23.00

  • Hoffman® Horticultural Vermiculite - 2cu ft

    Hoffman Hoffman® Horticultural Vermiculite - 2cu ft

    In stock

     Soil conditioner (gold color) that loosens soil, provides aeration and retains water. Can be used to start seeds, propagate cuttings and store bulbs. Blend with peat moss and perlite for custom soilless mix. 

    In stock

    $49.99

  • WHITTEMORE A4 Vermiculite Coarse 4CF (African)

    Whittemore WHITTEMORE A4 Vermiculite Coarse 4CF (African)

    In stock

     Light weight Vermiculite provides aeration and moisture retention. It also possesses cation exchange properties, thus it can hold available to the growing plant ammonium, potassium, calcium and magnesium. 

    In stock

    $54.99

  • Sale -13% GROW!T Perlite Grade #3, Coarse, 4 cu ft

    Grow!T GROW!T Perlite Grade #3, Coarse, 4 cu ft

    In stock

    GROW!T Perlite is a versatile and inert soil amendment and soilless medium. Use it to aerate soil in container gardening, for germination and propagation of seedlings, for propagation of cuttings, and as a hydroponic medium. Hydrofarm searched globally and went to great lengths to find a source of top-quality perlite, and succeeded-and what we found is offered in the GROW!T line of perlite products. Multiple grades available: #2 Perlite (1/16" - 5/8" granules), #3 Perlite (1/8" - 5/8" granules), #4 Perlite (1/3" - 3/4" granules), and #8 Perlite (3/4"-1 1/3" granules). Enhanced aeration and drainage Completely sterile Neutral pH of around 7.0 Odorless and lightweight Aids in breaking up heavy soils Derived from a natural source

    In stock

    $51.95 $44.99

  • Colorado Worm Company Vermicompost - 2GAL

    Build-A-Soil Colorado Worm Company Vermicompost - 2GAL

    In stock

    Colorado Worm Company vermicompost (worm castings), also known as COWOCO. This size is the 2 gallon bag, approximately 10 lbs. How to use Top-dress: spread a generous two-inch layer over flowerpots or raised beds every two weeks to one month, during both veg and flower stages. Castings tea: for an extra phosphorus boost, aerate water, add the castings at a rate of 1:10 to water, brew for no more than 24 hours, and apply directly to the root zone. Sizes and approximate weights 1 cubic foot = approximately 40 lbs 1/2 cubic foot = approximately 20 lbs 2 gallon bag = approximately 10 lbs 1 cubic yard = approximately 1000 lbs About the producer Colorado Worm Company's operation has a minimal carbon footprint: it uses only a modest tractor and maintains a closed-loop system with its worms.

    In stock

    $45.00

  • Colorado Worm Company Vermicompost - 1 cu ft

    Build-A-Soil Colorado Worm Company Vermicompost - 1 cu ft

    In stock

    Colorado Worm Company vermicompost (worm castings), also known as COWOCO. This size is 1 cubic foot, approximately 40 lbs. How to use Top-dress: spread a generous two-inch layer over flowerpots or raised beds every two weeks to one month, during both veg and flower stages. Castings tea: for an extra phosphorus boost, aerate water, add the castings at a rate of 1:10 to water, brew for no more than 24 hours, and apply directly to the root zone. Sizes and approximate weights 1 cubic foot = approximately 40 lbs 1/2 cubic foot = approximately 20 lbs 2 gallon bag = approximately 10 lbs 1 cubic yard = approximately 1000 lbs About the producer Colorado Worm Company's operation has a minimal carbon footprint: it uses only a modest tractor and maintains a closed-loop system with its worms.

    In stock

    $99.00

  • Sale -9% Bu Blend Biodynamic Compost 1 Cu Ft

    Bu Brew Bu Blend Biodynamic Compost 1 Cu Ft

    In stock

      Contains: Organically Fed, Humanely Treated Outdoor raised Dairy cow manure, straw, vineyard wood chips, and biodynamic concentrations of yarrow, chamomile, valerian, stinging nettle, dandelion, and oak bark. Mix 2 inches of Malibu Compost with native soil every couple of months Saves water and reduces erosion "Our compost repairs your soil's ecosystem, saves water and serves as a source of humus for planting and managing soil health while also emanating energetic life forces to vitalize your vegetables, plants, flowers, lawns, gardens, farms and our earth." Useful Info Coming Soon! How To Use Coming Soon! Shipping Info Malibu Compost:1 Cubic Foot:Dimensions: 24 x 14 x 4.5Weight: 45.0 lbs1 Yard Tote:Dimensions: 36 x 36 x 36Weight: 1000 lbs2 Yard Tote:Dimensions: 36 x 36 x 72Weight: 2000 lbs 

    In stock

    $34.99 $32.00

  • Espoma® Organic® Compost Starter - 4lb

    Espoma Espoma® Organic® Compost Starter - 4lb

    In stock

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

    In stock

    $9.49

  • Lambert Sphagnum Moss 8 dry qt

    LAMBERT PEAT MOSS, INC Lambert Sphagnum Moss 8 dry qt

    In stock

     Lambert Sphagnum Moss is used in the lining of wire frames and hanging baskets. It is used extensively by nurserymen for air layering. Some species of orchids, especially Phalaenopsis, are grown in large quantities using nothing but sphagnum moss. 

    In stock

    $14.99

  • Coast of Maine Cow Manure Compost Schoodic Blend 1 CUFT

    Coast of Maine Coast of Maine Cow Manure Compost Schoodic Blend 1 CUFT

    In stock

    Coast of Maine Schoodic Blend Cow Manure Compost is a dark, rich soil made from carefully composted cow manure blended with peat and peat humus. The result is an all-natural, easy-to-use, all-purpose organic soil amendment ideal for conditioning vegetable gardens and flower beds. 

    In stock

    $13.49

  • The Soil Makers Fungal Compost - 1 CU FT

    The Soil Makers The Soil Makers Fungal Compost - 1 CU FT

    In stock

     Enhance your garden with our Fungal Compost, made from 100% organic ramial wood chips. No manures! This fungal compost increases water retention and soil aeration, leading to healthier and more productive plants. Reap the benefits of a natural and sustainable solution to nourish your garden. 

    In stock

    $23.00

  • Sale -13% GROW!T #2 Perlite Super Coarse 4 cu ft

    Grow!T GROW!T #2 Perlite Super Coarse 4 cu ft

    In stock

    GROW!T Perlite is a versatile and inert soil amendment and soilless medium. Use it to aerate soil in container gardening, for germination and propagation of seedlings, for propagation of cuttings, and as a hydroponic medium. Hydrofarm searched globally and went to great lengths to find a source of top-quality perlite, and succeeded-and what we found is offered in the GROW!T line of perlite products. Multiple grades available: #2 Perlite (1/16" - 5/8" granules), #3 Perlite (1/8" - 5/8" granules), #4 Perlite (1/3" - 3/4" granules), and #8 Perlite (3/4"-1 1/3" granules).Enhanced aeration and drainageCompletely sterileNeutral pH of around 7.0Odorless and lightweightAids in breaking up heavy soilsDerived from a natural sourceNow with 15% more perlite in every bag!*(*compared to Plant!t perlite)

    In stock

    $53.95 $46.99

  • Sale -14% GROW!T #4 Perlite 4 cu ft

    Grow!T GROW!T #4 Perlite 4 cu ft

    In stock

    GROW!T Perlite is a versatile and inert soil amendment and soilless medium. Use it to aerate soil in container gardening, for germination and propagation of seedlings, for propagation of cuttings, and as a hydroponic medium. Hydrofarm searched globally and went to great lengths to find a source of top-quality perlite, and succeeded-and what we found is offered in the GROW!T line of perlite products. Multiple grades available: #2 Perlite (1/16" - 5/8" granules), #3 Perlite (1/8" - 5/8" granules), #4 Perlite (1/3" - 3/4" granules), and #8 Perlite (3/4"-1 1/3" granules).Enhanced aeration and drainageCompletely sterileNeutral pH of around 7.0Odorless and lightweightAids in breaking up heavy soilsDerived from a natural sourceNow with 15% more perlite in every bag!*(*compared to Plant!t perlite)

    In stock

    $63.95 $54.99

  • Sale -10% GreenGro Earthshine Biochar Blend 5lb

    GreenGro GreenGro Earthshine Biochar Blend 5lb

    In stock

    The Earthshine Biochar blend is a fast and easy way to boost the performance of new soil, reuse your old soil, and improve the effectiveness of compost teas and mycorrhizae products. This amazing product will save any gardener money by reducing soil costs, improving fertilizer use and reducing water use over the gardening season. Biochar and its use in amending soil is an age old Native American technique that has been around for over a thousand years. It is based upon the observation that after a forest fire occurs the surrounding vegetative growth is tremendously more robust then areas that were not affected by the fires. The fire creates rich deposits of carbon in the soil, increases soil fertility and encourages microbial activity. Earthshine mimics this incredible process and thereby brings new life to your garden. The International Biochar Initiative has recognized Biochar’s ability to rejuvenate soil carbon levels, sequester CO2, reduce nutrient runoff, and increase water use efficiency. We blend our Biochar with glacial rock dust, soybean meal, humic acid, and worm castings to create a complete soil rejuvenating product. Odor and Appearance: Since this is considered a fermented fertilizer product (and biologically active) over time a fermented wine or yeast smell may occur due to the breaking down of nutrients in the product or soil. This is safe, natural and completely normal. Store in a cool, dry place and out of direct sunlight until application.

    In stock

    $38.73 $34.86

  • Sale -10% GreenGro Earthshine Biochar Blend 2lb

    GreenGro GreenGro Earthshine Biochar Blend 2lb

    In stock

    The Earthshine Biochar blend is a fast and easy way to boost the performance of new soil, reuse your old soil, and improve the effectiveness of compost teas and mycorrhizae products. This amazing product will save any gardener money by reducing soil costs, improving fertilizer use and reducing water use over the gardening season. Biochar and its use in amending soil is an age old Native American technique that has been around for over a thousand years. It is based upon the observation that after a forest fire occurs the surrounding vegetative growth is tremendously more robust then areas that were not affected by the fires. The fire creates rich deposits of carbon in the soil, increases soil fertility and encourages microbial activity. Earthshine mimics this incredible process and thereby brings new life to your garden. The International Biochar Initiative has recognized Biochar’s ability to rejuvenate soil carbon levels, sequester CO2, reduce nutrient runoff, and increase water use efficiency. We blend our Biochar with glacial rock dust, soybean meal, humic acid, and worm castings to create a complete soil rejuvenating product. Odor and Appearance: Since this is considered a fermented fertilizer product (and biologically active) over time a fermented wine or yeast smell may occur due to the breaking down of nutrients in the product or soil. This is safe, natural and completely normal. Store in a cool, dry place and out of direct sunlight until application.

    In stock

    $25.60 $23.04

  • Whittemore Perlite Supercoarse 4 cu ft

    Whittemore WHITTEMORE Perlite Supercoarse 4 CF

    In stock

    WHITTEMORE Perlite Supercoarse 4 CF

    In stock

    $39.99

  • Lambert Horticultural Vermiculite 8 Dry Qt Lambert Horticultural Vermiculite 8 Dry Qt

    LAMBERT PEAT MOSS, INC Lambert Horticultural Vermiculite 8 Dry Qt

    In stock

    Lambert Horticultural Vermiculite is an aggregate used to increase water retention in your potting mixes. It is very useful to cover germinating seeds. In fact, its water-holding properties and its considerable porosity aid in insulating the germinating seeds and protect them from drying out and from damaging air currents.

    In stock

    $18.49

  • Sale -12% Aurora Innovations Procision Perlite Coarse #4, 4 cu ft

    Roots Organics Aurora Innovations Procision Perlite Coarse #4, 4 cu ft

    In stock

    Procision Perlite Coarse is cut with a ten mesh screen leaving all material to retain #4. Perlite ore is a naturally occurring volcanic glass containing a small percentage of water. When that ore is introduced to tremendous heat the glass liquefies and the trapped water expands creating a remarkable and versatile material. In an ongoing quest to improve the quality of our products, Aurora Innovations recognized the opportunity to begin producing another of their own materials. Success at a new venture is never easy, but they're really excited about the quality of their production.

    In stock

    $59.95 $52.99

  • Sale -13% Aurora Innovations Procision Perlite Regular #5, 4 cu ft

    Roots Organics Aurora Innovations Procision Perlite Regular #5, 4 cu ft

    In stock

    Procision Perlite Coarse is cut with a ten mesh screen leaving all material to retain #4. Perlite ore is a naturally occurring volcanic glass containing a small percentage of water. When that ore is introduced to tremendous heat the glass liquefies and the trapped water expands creating a remarkable and versatile material. In an ongoing quest to improve the quality of our products, Aurora Innovations recognized the opportunity to begin producing another of their own materials. Success at a new venture is never easy, but they're really excited about the quality of their production.

    In stock

    $62.95 $54.99

  • Lambert Horticultural Wood Charcoal 4 Dry Qt

    Lambert Lambert Horticultural Wood Charcoal 4 Dry Qt

    In stock

    Lambert Horticultural Wood Charcoal filtration properties aid a media by purifying air and water. It is also used at the bottom of containers to aid in drainage of excessive water. Charcoal is also used with other substrates in the cultivation of certain species of orchids such as Vandas.

    In stock

    $9.99


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