{"title":"Soil Amendments, Conditioners \u0026 pH Adjusters","description":"\u003cp\u003eSoil amendments improve the physical structure, aeration, and biological activity of your growing substrate to create the ideal environment for healthy root systems. This comprehensive category includes everything necessary to customize your mix from scratch or rejuvenate tired dirt, featuring essential drainage improvers like perlite alongside powerful pH buffers such as dolomite lime.\u003c\/p\u003e\n\u003cp\u003eEven the highest quality potting mixes degrade over time, gradually losing their ability to hold oxygen and moisture effectively. Incorporating targeted soil amendments resolves heavy, compacted dirt issues and corrects hidden nutrient lockout problems caused by severe pH imbalances. Adding beneficial biological inoculants like mycorrhizae further supports massive root expansion, allowing your plants to absorb water and vital nutrients much more efficiently during stressful transplanting phases or unexpected drought conditions.\u003c\/p\u003e\n\u003cp\u003eBrowse the entire selection below and utilize the filters to shop by specific materials, brand names, or intended gardening use to formulate your perfect custom substrate. You can also explore our sub-categories for dedicated pH adjusters and specialized root enhancers.\u003c\/p\u003e","products":[{"product_id":"j-plus-t-garden-sulphur-pellets-soil-amendments-1lb","title":"pH Adjusters- J PLUS T Garden Sulphur Pellets 99.9%, 1LB Premium pH Lowering Agent for Acid-Loving Plants","description":"\u003cp\u003eMaintaining the correct acidity level is crucial for ensuring your plants can properly absorb available nutrients from the earth. This premium J PLUS T garden sulphur pellet acts as a highly effective soil amendment, allowing you to safely lower the pH of alkaline heavy soils. You can easily create an ideal growing environment for blueberries, azaleas, and other demanding acid-loving species that struggle in neutral conditions.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eFormulated as compacted, dust-free granules, these pure elemental sulphur pellets break down slowly through bacterial oxidation when mixed into moist ground. When you apply this reliable soil conditioner, it gradually converts into sulfuric acid, gently shifting the pH balance over several weeks without shocking delicate root systems. Unlike quick-acting liquids, this slow-release amendment provides a sustained correction that lasts throughout the entire season. It serves as one of the most dependable ways to remineralize depleted raised beds and prevent stubborn nutrient lockouts caused by high calcium levels.\u003c\/p\u003e\n\u003cp\u003eSprinkle these pellets generously over your existing garden beds in early spring and rake them lightly into the top layer of dirt before watering deeply. They work perfectly for outdoor rose gardens, rhododendron bushes, and camellias that require consistently acidic conditions to produce vibrant blooms. For container plants, you can mix a small amount directly into your indoor potting soil to adjust the starting pH profile. Each bag contains 1LB of concentrated, 99.9% pure material backed by J PLUS T's quality standards, giving you precise control over your garden chemistry.\u003c\/p\u003e","brand":"J PLUS T","offers":[{"title":"Default Title","offer_id":48182330392743,"sku":"699838579828-1pk","price":23.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/8352\/4007\/files\/j-plus-t-garden-sulphur-pellets-soil-amendments-1lb.webp?v=1777255625"},{"product_id":"j-plus-t-dolomite-lime-pelletized-soil-conditioner-5lb","title":"pH Adjusters-Dolomite Lime - J PLUS T Pelletized Soil Conditioner, 5LB Natural Calcium \u0026 Magnesium Amendment for Gardens","description":"\u003cp\u003eCorrecting acidic soil conditions is essential for unlocking vital nutrients and promoting sturdy, healthy plant cell development. This J PLUS T pelleted dolomite lime serves as a superior soil conditioner, simultaneously raising pH levels while adding two critical minerals often missing in sandy mediums. You can confidently treat large garden areas knowing this amendment delivers a slow-release boost that won't burn young seedlings.\u003c\/p\u003e\n\u003cp\u003eManufactured into uniform, dust-reducing pellets, this material breaks down gradually when incorporated into damp earth. When you add this rich limestone source to your planting holes or raised beds, it introduces a balanced dose of calcium and magnesium that strengthens leaf structure and prevents common disorders like blossom end rot. Because it is formulated to release slowly, it acts as a long-term plant food foundation rather than a quick fix that fades rapidly. It works exceptionally well to buffer acidic rainwater effects and stabilize the chemical balance of your heavy clay or sandy loam soils.\u003c\/p\u003e\n\u003cp\u003eApply this pelleted lime evenly across your vegetable patches or flower beds about four weeks before transplanting your spring crops into the ground. It performs beautifully under turf grass lawns to encourage deep green color and robust root growth without the mess of traditional powdered lime. You can also mix a smaller quantity directly into your base indoor potting soil mixture to prevent acidity buildup over multiple seasons. Each bag offers 5LB of professionally screened, high-calcium material designed for consistent, hassle-free application.\u003c\/p\u003e","brand":"J PLUS T","offers":[{"title":"2 LB","offer_id":48655542943911,"sku":"J PLUS T Dolomite Lime-1","price":20.99,"currency_code":"CAD","in_stock":false},{"title":"5 LB","offer_id":48655542976679,"sku":"J PLUS T Dolomite Lime-2","price":31.99,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/8352\/4007\/files\/j-plus-t-dolomite-lime-pelletized-soil-conditioner-5lb.webp?v=1777255696"},{"product_id":"gaia-green-soluble-seaweed-extract-liquid-fertilizer-300g","title":"Soil Conditioners- Gaia Green Soluble Seaweed Extract 0-0-17, 300g Potassium Rich Plant Food for Stress Relief","description":"\u003cp\u003eHelping your crops recover quickly from heat waves, transplant shock, or rough handling requires a specialized source of natural biological stimulants. This Gaia Green soluble seaweed extract acts as a powerful liquid fertilizer, delivering a massive concentration of bio-available potassium and trace hormones. You can easily revive struggling plants and improve their overall tolerance to environmental stress with this marine-derived supplement.\u003c\/p\u003e\n\u003cp\u003eDerived entirely from cold-water brown kelp, this concentrated powder dissolves instantly in water to create a potent tea for foliar or root feeding. When you feed your garden with this organic formula, the high potassium content actively strengthens cell walls and regulates internal water movement, making your foliage more resistant to wilting during dry spells. It also stimulates vigorous secondary root growth, ensuring your established shrubs have a deeper anchor system to access moisture. Because it is completely natural and non-toxic, it works safely alongside your regular synthetic nutrient schedule without causing any chemical interactions.\u003c\/p\u003e\n\u003cp\u003eMix this soluble powder into your watering can every week during periods of extreme heat or right after repotting sensitive houseplants. It shines particularly bright when used as a spray for outdoor vegetables like tomatoes and peppers to prevent blossom drop during high temperatures. For indoor growers, dilute a small amount for monthly feedings on thirsty tropicals that need extra hydration support. This 300g tub from Gaia Green provides a concentrated, shelf-stable supply of premium sea-kelp nutrition for the entire growing season.\u003c\/p\u003e","brand":"Gaia Green","offers":[{"title":"Default Title","offer_id":48182330687655,"sku":"678662002030","price":25.99,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/8352\/4007\/files\/a33yg-kpyp6.webp?v=1777255759"},{"product_id":"xtreme-gardening-mycos-mycorrhizae-inoculant-1lb","title":"Root Enhancers - Xtreme Gardening Mykos Inoculant, 1LB Endomycorrhizal Fungal Spores for Healthy Root Systems","description":"\u003cp\u003eExpanding your plant's root reach dramatically increases its ability to uptake water and nutrients from the surrounding medium. This Xtreme Gardening Mykos product serves as a highly effective mycorrhizae inoculant, introducing billions of beneficial fungal spores directly to the root zone. You can essentially extend your plant's root system by up to 100 times, allowing it to thrive in poor or compacted soils where others would struggle.\u003c\/p\u003e\n\u003cp\u003eThese specialized endomycorrhizal fungi form a symbiotic partnership with the majority of garden crops, wrapping around feeder roots and penetrating cellular structures. When you introduce this live amendment to your dirt, the fungus extends microscopic threads far beyond the root hairs, scavenging phosphorus and micronutrients that are otherwise inaccessible. This biological network also improves water retention capacity and naturally secretes antibiotics that protect young plants from certain soil-borne pathogens. Because these organisms live inside the root tissue, they provide a permanent structural advantage that standard fertilizer alone cannot achieve.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eTo activate these spores effectively, simply dip bare-root transplants into the powder before setting them in the ground, or shake it onto root balls when repotting indoors. Use this generously for trees, shrubs, fruit bushes, and large flowering perennials that establish long-term relationships with the soil. You can also sprinkle it into planting holes for annual crops to give them a powerful head start. Each 1LB container holds millions of viable, dormant spores ready to wake up and colonize your valuable garden investments immediately.\u003c\/p\u003e","brand":"Xtreme Gardening","offers":[{"title":"Default Title","offer_id":48182330851495,"sku":"860008417466","price":49.99,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/8352\/4007\/files\/xtreme-gardening-mycos-mycorrhizae-inoculant-1lb.webp?v=1776923572"},{"product_id":"advanced-nutrients-ph-down-liquid-fertilizer-1l","title":"Hydroponic Adjusters - Advanced Nutrients pH-Down, 1L Premium Acidic Solution for Hydroponic Reservoirs","description":"\u003cp\u003eMaintaining the exact pH level of your reservoir is the single most important factor for maximizing mineral absorption and preventing frustrating growth stalls. This Advanced Nutrients pH-Down acts as an essential liquid fertilizer additive, quickly lowering the alkalinity of your fresh water to the perfect sweet spot. You can completely eliminate dangerous nutrient lockouts and watch your demanding indoor crops thrive in a perfectly balanced aquatic environment.\u003c\/p\u003e\n\u003cp\u003eFormulated with highly concentrated, commercial-grade phosphoric acid, this potent solution adjusts your hydroponic nutrient solution rapidly and remains incredibly stable over several days. When you add this specific liquid fertilizer to your main tank, it creates an optimal acidic environment, usually between 5.5 and 6.3, where essential micronutrients like iron and manganese become highly bioavailable to delicate root hairs. Unlike cheap agricultural acids that cause wild, unpredictable fluctuations, this premium formula actively buffers the water chemistry. This means you will spend significantly less time chasing daily pH swings with your digital meter and more time focusing on canopy management.\u003c\/p\u003e\n\u003cp\u003eAdd just a few milliliters of this powerful plant food additive to your fully mixed reservoir, stir it thoroughly, and wait a few minutes before testing the final reading. It performs flawlessly in automated deep water culture setups, highly aerated drip systems, and even when adjusting tap water for a standard indoor potting soil container. Your heavy-feeding tomatoes, culinary herbs, and valuable tropical houseplants will reward you with explosive vegetative growth and massive, heavy yields. This 1L bottle delivers the uncompromising consistency and absolute reliability that serious growers consistently demand from Advanced Nutrients.\u003c\/p\u003e","brand":"Advanced Nutrients","offers":[{"title":"Default Title","offer_id":48182332620967,"sku":"845268001303","price":46.99,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/8352\/4007\/files\/advanced-nutrients-ph-down-liquid-fertilizer-1l.webp?v=1777257462"},{"product_id":"gaia-green-oyster-shell-flour-calcium-soil-amendments-2kg","title":"Soil amendments - Gaia Green Oyster Shell Flour 2kg | Natural Calcium Soil Conditioner for pH Management","description":"\u003cp\u003eMaintaining correct acidity levels in your garden beds is absolutely crucial for ensuring your crops can absorb available nutrients from the earth. This premium Gaia Green oyster shell flour acts as a highly effective soil conditioner, allowing you to safely raise the pH of acidic heavy soils. You can easily create an ideal growing environment for heavy-feeding tomatoes and vegetables that struggle in sour mediums.\u003c\/p\u003e \u003cp\u003eFinely ground from high-quality marine sources, this white powder serves as one of the most reliable natural soil amendments available to home growers. When you work this material into your dirt, it slowly releases high concentrations of calcium carbonate, gently shifting the chemical balance over several weeks without shocking delicate root hairs. This slow-release mechanism physically thickens the epidermal plant tissue, making your foliage far more resistant to environmental heat stress. Unlike quick-acting chemical lime, it provides a sustained correction that lasts throughout the entire growing season without washing away.\u003c\/p\u003e \u003cp\u003eSprinkle this powder generously over your existing garden beds in early spring and rake it lightly into the top layer of dirt before watering deeply. It performs flawlessly in outdoor vegetable patches to prevent blossom end rot, and works beautifully to neutralize acidity in your indoor potting soil storage bins. By incorporating this product into your standard routine, you guarantee a lush, healthy garden. This 2kg box from Gaia Green delivers precise, certified organic control over your garden chemistry.\u003c\/p\u003e","brand":"Gaia Green","offers":[{"title":"Default Title","offer_id":48188289417383,"sku":"678662650026","price":46.99,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/8352\/4007\/files\/gaia-green-oyster-shell-flour-calcium-soil-amendments-2kg.webp?v=1776923753"},{"product_id":"j-plus-t-potassium-bicarbonate-soil-conditioner-fungicide","title":"pH Adjusters- J PLUS T Potassium Bicarbonate | Organic Mildew Prevention and pH Buffer","description":"\u003cp\u003eCombating aggressive fungal infections and stubborn powdery mildew requires a safe, reliable foliar treatment that absolutely will not burn your sensitive canopy. This premium J PLUS T potassium bicarbonate serves as a highly effective soil conditioner and topical spray base, allowing you to alter surface pH levels instantly. You can easily wipe out active fungal spores without resorting to harsh, toxic chemical pesticides inside your greenhouse.\u003c\/p\u003e\n\u003cp\u003eDerived from high-purity sources, this fine white powder functions as an outstanding natural fungicide when mixed with water and a tiny bit of soap. When you spray this liquid onto your foliage, the high alkalinity physically disrupts the cellular walls of mildew, causing it to rapidly dehydrate and collapse. Unlike chemical systemics, this powder breaks down cleanly and acts as an organic fertilizer, leaving behind useful potassium that your plants can safely absorb through their leaves. It serves as one of the safest soil amendments to deploy in dense urban gardens where pets and children are present.\u003c\/p\u003e\n\u003cp\u003eDissolve a measured amount of this powder into your spray tank and thoroughly drench both sides of the leaves at the very first sign of white spots. It works beautifully for squash, heavy-yielding tomatoes, indoor tropicals, and flowering roses during humid summer stretches. You can also use it to neutralize acidic runoff in your indoor potting soil bins. This bag from J PLUS T provides serious growers with an incredibly pure, highly versatile defensive tool.\u003c\/p\u003e","brand":"J PLUS T","offers":[{"title":"2LB","offer_id":48410154598567,"sku":"J PLUS T POTASSIUM BICARBONATE-2lb","price":31.99,"currency_code":"CAD","in_stock":true},{"title":"5LB","offer_id":48410154631335,"sku":"J PLUS T POTASSIUM BICARBONATE-5lb","price":46.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/8352\/4007\/files\/j-plus-t-potassium-bicarbonate-soil-conditioner-fungicide.webp?v=1777271588"},{"product_id":"j-plus-t-gypsum-soil-amendment-clay-breaker-powder","title":"Gypsum soil amendment - J PLUS T Fine Calcium Powder| Clay Breaker Soil Conditioner","description":"\u003cp\u003eBreaking up tight, compacted clay dirt without accidentally altering your hard-earned pH balance is a difficult challenge for any home gardener. This premium J PLUS T gypsum powder serves as an incredibly effective gypsum soil amendment, physically pulling clay particles apart to allow water and oxygen to penetrate deep into the earth. You can easily transform heavy, unworkable ground into a loose, breathable oasis where roots can thrive.\u003c\/p\u003e\n\u003cp\u003eFormulated as an ultra-fine, highly pure powder, this mineral acts as one of the most reliable soil amendments for reclaiming salt-damaged coastal properties or heavy suburban hardpan. When you work this material into your dirt, it actively binds with sodium and flushes it away, simultaneously depositing rich concentrations of bio-available calcium and sulfur. Because it is pH neutral, it functions as a highly stable soil conditioner that will never force your chemical readings too high. It ensures your heavy-feeding crops can freely push their root hairs outward without physical resistance, maximizing their ability to absorb water and nutrition.\u003c\/p\u003e\n\u003cp\u003eAggressively work this fine powder into your outdoor garden beds in early spring before transplanting, or use it to loosen up the surface of dense raised boxes. It is absolutely essential for preparing beds for heavy-feeding tomatoes, spring bulbs, and ornamental trees. You can even mix a small quantity directly into your potting soil to provide a slow-release calcium boost without altering the medium's delicate acid profile. This bag from J PLUS T provides dedicated landscapers with the uncompromising, heavy-duty structural correction required for serious gardening success.\u003c\/p\u003e","brand":"J PLUS T","offers":[{"title":"2 LB","offer_id":48661355430055,"sku":"J PLUS T Gypsum for Plants-2lb","price":26.99,"currency_code":"CAD","in_stock":false},{"title":"5 LB","offer_id":48661355462823,"sku":"J PLUS T Gypsum for Plants-5lb","price":31.99,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/8352\/4007\/files\/j-plus-t-gypsum-soil-amendment-clay-breaker-powder-5lb.webp?v=1777258542"},{"product_id":"gaia-green-living-soil-organic-potting-soil-30l","title":"Soil Conditioners - Gaia Green Premium Living Soil Blend, 30L | Nutrient Rich Biologically Active Potting Mix","description":"\u003cp\u003eEstablishing a vibrant garden starts with choosing a base medium that actively works in harmony with natural biological systems. This Gaia Green living soil acts as the ultimate organic potting soil, pre-loaded with an incredible diversity of beneficial microbes and natural fungi. You can confidently eliminate the complexity of synthetic feeding schedules and let nature do the heavy lifting for your crops.\u003c\/p\u003e \u003cp\u003eExpertly crafted from high-quality peat moss, washed coco coir, and aged compost, this fluffy potting mix provides an absolutely flawless ratio of air capacity and water retention. When you plant your seeds or transplants into this medium, the beneficial microbes instantly colonize the roots, converting the pre-loaded organic fertilizer into readily available nutrition. This active biological cycling naturally protects your plants from soil-borne diseases and increases their natural resistance to environmental heat stress. Because it is structurally stable, it will never shrink, compact, or turn into a hard brick after several months of overhead watering.\u003c\/p\u003e \u003cp\u003eUse this premium base straight out of the bag to fill your outdoor raised beds, greenhouse tables, or large fabric containers. It serves beautifully as an indoor potting soil for heavy-feeding tropicals, aromatic herbs, and demanding flowering species. To maintain its peak biological performance, always keep the medium slightly damp and avoid using harsh chemical drenches that kill beneficial bacteria. This massive 30L bag from Gaia Green delivers the uncompromising, professional-grade craftsmanship that serious organic growers worldwide trust.\u003c\/p\u003e","brand":"Gaia Green","offers":[{"title":"Default Title","offer_id":48188289646759,"sku":"678662020300","price":69.99,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/8352\/4007\/files\/gaia-green-living-soil-organic-potting-soil-30l.webp?v=1776923359"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/8352\/4007\/collections\/gaia-green-mineralized-phosphate-organic-fertilizer-2kg.webp?v=1777447516","url":"https:\/\/www.jptgrow.com\/collections\/soil-amendments-ph-adjusters.oembed","provider":"JPTGrow","version":"1.0","type":"link"}