{"title":"Slow Release","description":"\u003cp\u003eAmendments that release gradually over several weeks to months. A steady, low-risk supply that suits most feeding programs and reduces the need for frequent applications.\u003c\/p\u003e","products":[{"product_id":"crustacean-meal","title":"Crustacean Meal","description":"\u003cp\u003eCrustacean Meal is a unique, marine-derived fertiliser made from the shells of crabs, prawns, and lobsters — dried and processed through our custom equipment to yield a pasteurised, graded product that's clean and ready to use straight in the garden. This is the crème de la crème of soil ingredients: while some vendors offer discarded remains at premium prices, or worse, factory-farmed imported shrimp passed off as crustacean meal, ours comes from a food-grade source first, then undergoes our full custom drying and processing chain.\u003c\/p\u003e\n\u003cp\u003eThe standout feature is chitin content — significantly higher than insect frass — which elicits a systemic acquired resistance (SAR) immune response in plants, helping to protect them from pests, diseases, and environmental stresses. Alongside the chitin, crustacean meal delivers 20% calcium for strong cell walls and improved plant structure, plus a slow-release NPK feed that breaks down gradually over time. It's a genuine multi-purpose amendment that builds both fertility and plant resilience simultaneously.\u003c\/p\u003e","brand":"Soil Supply Co.","offers":[{"title":"500g","offer_id":48918018982128,"sku":"CRUSTACEAN-500G","price":45.0,"currency_code":"AUD","in_stock":false},{"title":"1kg","offer_id":48918019014896,"sku":"CRUSTACEAN-1KG","price":90.0,"currency_code":"AUD","in_stock":false},{"title":"2.5kg","offer_id":48918019047664,"sku":"CRUSTACEAN-2.5KG","price":160.0,"currency_code":"AUD","in_stock":false},{"title":"5kg","offer_id":48918019080432,"sku":"CRUSTACEAN-5KG","price":300.0,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0823\/1262\/6416\/files\/crustacean-meal-597291.jpg?v=1772156927"},{"product_id":"feather-meal","title":"Feather Meal","description":"\u003cp\u003eFeather Meal is a high-quality, slow-release nitrogen source made from 100% ground feathers, delivering a straight 15-0-0 NPK profile. What makes feather meal stand out from other nitrogen amendments is its unique protein structure — keratin breaks down at a much more gradual rate than something like blood meal, making it a safer option for sensitive or finicky crops, and an excellent partner when used alongside faster-release nitrogen sources for layered availability.\u003c\/p\u003e\n\u003cp\u003eAt 15% nitrogen, feather meal is one of the strongest organic N sources available, but the slow-release nature means it feeds steadily over time rather than delivering a quick flush. It increases organic matter in the soil, improving drainage, aeration, and water retention, and provides a food source for beneficial insects and soil organisms alike. It works well as a standalone nitrogen input or as a complement to whole fish meal, blood meal, or soybean meal for a more complete fertility program.\u003c\/p\u003e","brand":"Soil Supply Co.","offers":[{"title":"500g","offer_id":48918019145968,"sku":"FEATHER-500G","price":9.0,"currency_code":"AUD","in_stock":false},{"title":"1kg","offer_id":48918019178736,"sku":"FEATHER-1KG","price":17.0,"currency_code":"AUD","in_stock":false},{"title":"2.5kg","offer_id":48918019211504,"sku":"FEATHER-2.5KG","price":30.0,"currency_code":"AUD","in_stock":false},{"title":"5kg","offer_id":48918019244272,"sku":"FEATHER-5KG","price":55.0,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0823\/1262\/6416\/files\/feather-meal-227418.jpg?v=1772156913"},{"product_id":"volcanic-ash","title":"Volcanic Ash","description":"\u003cp\u003eVolcanic Ash is a finely divided mineral amendment thrown out by volcanic activity, prized for the same reason the soils around active volcanoes are some of the most fertile on earth. It carries a broad spectrum of minerals — silica, iron, magnesium, calcium, potassium and a long tail of trace elements — in a naturally slow-release form. Rather than feeding plants in a rush like a soluble fertiliser, it behaves like a mineral bank: water, root acids and soil microbes weather it down over months, releasing small amounts steadily and remineralising soils that compost and peat-based mixes often leave short.\u003c\/p\u003e\n\u003cp\u003eIts very fine particle size is part of the appeal — it blends evenly through the root zone and puts a lot of mineral surface in contact with soil and biology. The high silica content helps stiffen cell walls, which growers tie to sturdier plants and better resistance to pests and disease, while the broader mineral load supports soil structure, aeration and cation exchange. It suits any long-cycle system — folded into a fresh mix, worked into beds, or added to a living-soil or no-till reset — anywhere you want durable mineral fertility rather than a quick hit.\u003c\/p\u003e","brand":"Soil Supply Co.","offers":[{"title":"500g","offer_id":48918021112048,"sku":"VOLCASH-500G","price":6.0,"currency_code":"AUD","in_stock":false},{"title":"1kg","offer_id":48918021144816,"sku":"VOLCASH-1KG","price":9.0,"currency_code":"AUD","in_stock":false},{"title":"2.5kg","offer_id":48918021177584,"sku":"VOLCASH-2.5KG","price":17.0,"currency_code":"AUD","in_stock":false},{"title":"5kg","offer_id":48918021210352,"sku":"VOLCASH-5KG","price":30.0,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0823\/1262\/6416\/files\/volcanic-ash-895006.jpg?v=1783325497"},{"product_id":"soft-rock-phosphate","title":"Soft Rock Phosphate","description":"\u003cp\u003eSoft Rock Phosphate is one of the best ways to build lasting phosphorus reserves in your soil. Unlike conventional fast-release phosphorus fertilisers, soft rock phosphate delivers its payload in slow-release, microbe-friendly forms that feed the soil over an extended period.\u003c\/p\u003e\n\u003cp\u003eProviding approximately 9% phosphorus and 19% calcium, this mineral supports strong root growth, solid plant establishment, and heavy flower production — two crucial elements that underpin a well-functioning garden from the ground up. Because it acts as a long-term resource, a less-is-more approach to dosing pays off — it's far easier to add less up front and top-dress or increase on the next run than to overload early.\u003c\/p\u003e","brand":"Soil Supply Co.","offers":[{"title":"500g","offer_id":48918021669104,"sku":"SOFTROCK-500G","price":6.0,"currency_code":"AUD","in_stock":true},{"title":"1kg","offer_id":48918021701872,"sku":"SOFTROCK-1KG","price":11.0,"currency_code":"AUD","in_stock":true},{"title":"2.5kg","offer_id":48918021734640,"sku":"SOFTROCK-2.5KG","price":20.0,"currency_code":"AUD","in_stock":true},{"title":"5kg","offer_id":48918021767408,"sku":"SOFTROCK-5KG","price":38.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0823\/1262\/6416\/files\/softrock_e24df974-dd8b-4cd1-a9bd-8a5224fb797f.png?v=1782529904"},{"product_id":"wollastonite","title":"Wollastonite","description":"\u003cp\u003eWollastonite (Calcium Silicate) is a dual-purpose mineral amendment providing both calcium and silica in a single ingredient — two minerals plants need in good supply throughout the growing season to form thick, resilient leaves and strong stems.\u003c\/p\u003e\n\u003cp\u003eUsing wollastonite as part or all of your liming ingredient lets you adjust pH while simultaneously building plant-available silica levels in the soil. The results speak for themselves — plants grown with wollastonite show improved resistance to pests, disease, and even drought, alongside higher yields and better overall quality. It pairs well with oyster lime and gypsum, creating overlapping calcium sources while getting more silica into the soil than any of those ingredients can provide alone.\u003c\/p\u003e","brand":"Soil Supply Co.","offers":[{"title":"500g","offer_id":48918021800176,"sku":"WOLLA-500G","price":6.5,"currency_code":"AUD","in_stock":true},{"title":"1kg","offer_id":48918021832944,"sku":"WOLLA-1KG","price":10.0,"currency_code":"AUD","in_stock":true},{"title":"2.5kg","offer_id":48918021865712,"sku":"WOLLA-2.5KG","price":20.0,"currency_code":"AUD","in_stock":true},{"title":"5kg","offer_id":48918021898480,"sku":"WOLLA-5KG","price":38.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0823\/1262\/6416\/files\/wollastonite.png?v=1782530068"},{"product_id":"montmorillonite","title":"Montmorillonite","description":"\u003cp\u003eMontmorillonite (Calcium Bentonite) is a premium-grade clay mineral sourced from Australia's world-class bentonite reserves — widely regarded as the \"Cadillac of Clays\" in soil building. Its primary role is increasing the cation exchange capacity (CEC) of your soil, helping it hold onto nutrients rather than letting them leach away with watering.\u003c\/p\u003e\n\u003cp\u003eCalcium bentonite is commonly used to convert sandy, free-draining substrates into something with real nutrient-holding power. It also provides a source of exchangeable calcium, supporting cell structure and soil flocculation. Because it's a true clay mineral, it will hold significant water — which is a benefit in moderation but means it should be added sparingly and incrementally.\u003c\/p\u003e","brand":"Soil Supply Co.","offers":[{"title":"500g","offer_id":48918022783216,"sku":"MONTCB-500G","price":10.0,"currency_code":"AUD","in_stock":true},{"title":"1kg","offer_id":48918022815984,"sku":"MONTCB-1KG","price":18.0,"currency_code":"AUD","in_stock":true},{"title":"2.5kg","offer_id":48918022848752,"sku":"MONTCB-2.5KG","price":42.0,"currency_code":"AUD","in_stock":true},{"title":"5kg","offer_id":48918022881520,"sku":"MONTCB-5KG","price":78.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0823\/1262\/6416\/files\/montmorillonite.png?v=1782530550"},{"product_id":"raw-humates","title":"Raw Humates","description":"\u003cp\u003eRaw Humates (predominantly Lignite) are a slow-release, insoluble source of humic and fulvic acids in their unextracted, natural form. Sourced from Australia's premium humate deposits — regarded as the best globally — this is the raw ore that purified humic and fulvic acid products are chemically extracted from, offering far greater long-term availability of these crucial organic acids at constant background levels.\u003c\/p\u003e\n\u003cp\u003eUnlike soluble humic acid extractions, which require regular reapplication and carry residual potassium hydroxide from the extraction process, raw humates are insoluble and lock their benefits into the soil for extended release. They're also naturally acidic rather than alkaline, making them ideal for balancing the pH of alkaline fungal-dominant composts without harshly affecting soil biology. The bulk carbon content feeds long-term soil structure and microbial activity — benefits that soluble extracts simply can't replicate.\u003c\/p\u003e","brand":"Soil Supply Co.","offers":[{"title":"500g","offer_id":48918022914288,"sku":"HUMATES-500G","price":7.5,"currency_code":"AUD","in_stock":true},{"title":"1kg","offer_id":48918022947056,"sku":"HUMATES-1KG","price":12.0,"currency_code":"AUD","in_stock":true},{"title":"2.5kg","offer_id":48918022979824,"sku":"HUMATES-2.5KG","price":26.0,"currency_code":"AUD","in_stock":true},{"title":"5kg","offer_id":48918023012592,"sku":"HUMATES-5KG","price":48.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0823\/1262\/6416\/files\/rawhumates.png?v=1782530763"},{"product_id":"rice-hulls","title":"Rice Hulls","description":"\u003cp\u003eRice Hulls are a lightweight, natural soil conditioner that improves drainage, aeration, and soil structure while slowly contributing silica and carbon as they break down. With a slower decomposition rate than most organic mulch materials, rice hulls hold their structure in the soil for extended periods — providing lasting physical benefits long before they fully decompose.\u003c\/p\u003e\n\u003cp\u003eAs rice hulls are predominantly composed of silica and carbon, their value lies in what they do for soil structure rather than fertility. The silica content becomes plant-available as the hulls gradually break down, supporting stronger stems, thicker cell walls, and improved pest and disease resistance. The carbon feeds soil biology at a steady background rate without tying up nitrogen the way heavier carbon inputs can at high doses. They won't shift your NPK ratios, making them a safe structural addition to any mix.\u003c\/p\u003e","brand":"Soil Supply Co.","offers":[{"title":"5L","offer_id":49818587955440,"sku":"RICEHULLS-5L","price":8.0,"currency_code":"AUD","in_stock":true},{"title":"20L","offer_id":49818587988208,"sku":"RICEHULLS-20L","price":25.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0823\/1262\/6416\/files\/ricehulls.png?v=1782530978"},{"product_id":"hemp-seed-meal","title":"Hemp Seed Meal","description":"\u003cp\u003eHemp Seed Meal is a protein-rich, plant-derived nitrogen amendment left over after cold-pressing hemp seed for oil. It carries a gentle NPK of 5-1.5-1 alongside a broad spread of secondary and trace minerals — magnesium, calcium, sulfur, iron and zinc among them — making it a complete, vegan feed for the vegetative phase. Because that nitrogen is held in protein rather than mineral salts, it releases slowly as soil microbes break it down, feeding plants steadily over weeks with none of the burn risk of synthetic nitrogen.\u003c\/p\u003e\n\u003cp\u003eBeyond feeding the plant, hemp seed meal feeds the soil. The fatty acids left behind after pressing make it an especially rich food source for microbes and fungi — a slow-burning energy input that keeps the soil food web active. It's a favourite of earthworms and a solid carbon-and-nitrogen source too, and it's been observed to hold back some pathogenic soil microbes as the biology shifts in its favour. That makes it well suited to living-soil and no-till systems — building a fresh mix, top-dressing an established bed, or recharging used soil between cycles.\u003c\/p\u003e","brand":"Soil Supply Co.","offers":[{"title":"500g","offer_id":49977990807792,"sku":"HEMP-500G","price":12.0,"currency_code":"AUD","in_stock":false},{"title":"1kg","offer_id":49977990840560,"sku":"HEMP-1KG","price":22.0,"currency_code":"AUD","in_stock":false},{"title":"2.5kg","offer_id":49977990873328,"sku":"HEMP-2.5KG","price":38.0,"currency_code":"AUD","in_stock":false},{"title":"5kg","offer_id":49977990906096,"sku":"HEMP-5KG","price":69.0,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0823\/1262\/6416\/files\/hempseedmeal.png?v=1783316982"},{"product_id":"mustard-seed-meal","title":"Mustard Seed Meal","description":"\u003cp\u003eMustard Seed Meal is the defatted meal left after pressing oil from mustard seed (Brassica and Sinapis species), and it works on two fronts. As it breaks down in moist soil, naturally occurring glucosinolates are hydrolysed into isothiocyanates — the same pungent compounds behind mustard's bite — which act as a natural biofumigant, suppressing plant-parasitic nematodes and soilborne fungi without synthetic chemicals. At the same time it's a high-protein, nitrogen-rich meal that feeds the following crop as it mineralises.\u003c\/p\u003e\n\u003cp\u003eThis makes mustard seed meal a genuine dual-purpose input: a pre-plant soil cleanse and a nitrogen feed in one. It suits growers managing disease or nematode pressure in beds, no-till plots or reused living soil, and slots neatly into a reset between cycles. Because its biofumigant action doesn't discriminate between good and bad, it's worked into bare soil ahead of planting rather than around living roots.\u003c\/p\u003e","brand":"Soil Supply Co.","offers":[{"title":"500g","offer_id":49978005651696,"sku":"MUSTARD-500G","price":6.0,"currency_code":"AUD","in_stock":false},{"title":"1kg","offer_id":49978005684464,"sku":"MUSTARD-1KG","price":10.0,"currency_code":"AUD","in_stock":false},{"title":"2.5kg","offer_id":49978005717232,"sku":"MUSTARD-2.5KG","price":22.0,"currency_code":"AUD","in_stock":false},{"title":"5kg","offer_id":49978005750000,"sku":"MUSTARD-5KG","price":38.0,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0823\/1262\/6416\/files\/mustardseedmeal.png?v=1783317038"},{"product_id":"waterfall-way-basalt","title":"Waterfall Way Basalt","description":"\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eWaterfall Way Basalt comes from the New England Tablelands of northern NSW, milled from the deep basalt beds left behind by the ancient Ebor Volcano. This was once a huge shield volcano — at least 45 km across, rising more than 800 m above the surrounding country, formed around 19 million years ago as the Australian plate drifted north over a volcanic hotspot. Erosion has since stripped away roughly 90% of it, leaving thick sheets of hard basalt across the plateau. The road that climbs from the coast up to Armidale — Waterfall Way — is named for the rivers that pour over the edges of those old lava flows, and at Ebor Falls the water drops over dramatic columns of basalt. That's the rock this product is made from.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eBecause it came from that setting, the stone is a hard, dense, olivine-bearing tholeiitic basalt that carries one of the highest paramagnetic readings of any basalt available in Australia. Paramagnetism is a measurable physical property of the rock (expressed in CGS units), and iron-rich basalt sits at the top of the scale. Unlike a fertiliser, basalt dust is a slow-acting remineraliser: it feeds soil biology and gradually releases a broad spectrum of minerals as it weathers, rather than delivering a quick nutrient hit. Because it breaks down slowly, a single application keeps working in the soil for a long time.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eCompared to palagonite, Waterfall Way Basalt is harder and less oxidised, and it carries more reactive calcium — much of it held in calcium-rich plagioclase feldspar — which is what makes the two work so well together. Palagonite is itself a form of basalt, but its different mineral structure gives it a different release pattern, so pairing the two broadens both the range of minerals on offer and the timeframe over which they're released. The extra reactive calcium makes this basalt particularly useful in peat-based mixes and acidic soils, where a source of slow, gentle calcium helps buffer the profile without the fast pH swing of lime. Mix it through at soil-building stage, or top-dress and water in on established beds and containers.\u003c\/p\u003e","brand":"Soil Supply Co.","offers":[{"title":"500g","offer_id":49983065325808,"sku":"BASALT-500G","price":8.0,"currency_code":"AUD","in_stock":false},{"title":"1kg","offer_id":49983065358576,"sku":"BASALT-1KG","price":14.0,"currency_code":"AUD","in_stock":true},{"title":"2.5kg","offer_id":49983065391344,"sku":"BASALT-2.5KG","price":28.0,"currency_code":"AUD","in_stock":true},{"title":"5kg","offer_id":49983065424112,"sku":"BASALT-5KG","price":50.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0823\/1262\/6416\/files\/eborbasalt.png?v=1783404493"}],"url":"https:\/\/soilsupply.co\/collections\/slow-release.oembed","provider":"Soil Supply Co.","version":"1.0","type":"link"}