{"title":"Silica","description":"\u003cp\u003eSilica strengthens cell walls, stems and leaf structure, and is associated with better resistance to pests and physical stress. Most potting mixes run low on plant-available silica, so it is usually added deliberately.\u003c\/p\u003e","products":[{"product_id":"seabird-guano-high-p-si","title":"Seabird Guano (High P\/Si)","description":"\u003cp\u003eHigh P\/Si Seabird Guano is a powerful, mineral-dense amendment derived from seabird droppings, delivering a concentrated source of phosphorus, silica, and calcium in a single ingredient. It also provides a wide range of trace minerals and a natural source of chitin — the same compound that triggers systemic acquired resistance in plants, boosting their natural defences.\u003c\/p\u003e\n\u003cp\u003eWith 13.6% phosphorus, 32% calcium, and 23.8% silica, this guano covers three major mineral demands in one application — driving flower and fruit production, strengthening cell walls and stems, and building robust root systems. It improves soil structure and drainage, corrects nutrient deficiencies, and lifts overall plant health and productivity.\u003c\/p\u003e","brand":"Soil Supply Co.","offers":[{"title":"500g","offer_id":48918019997936,"sku":"SEAGUANO-PSI-500G","price":6.0,"currency_code":"AUD","in_stock":true},{"title":"1kg","offer_id":48918020030704,"sku":"SEAGUANO-PSI-1KG","price":10.0,"currency_code":"AUD","in_stock":true},{"title":"2.5kg","offer_id":48918020063472,"sku":"SEAGUANO-PSI-2.5KG","price":17.0,"currency_code":"AUD","in_stock":true},{"title":"5kg","offer_id":48918020096240,"sku":"SEAGUANO-PSI-5KG","price":30.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0823\/1262\/6416\/files\/seabird-guano-high-psi-609000.jpg?v=1772156809"},{"product_id":"palagonite","title":"Palagonite","description":"\u003cp\u003ePalagonite is a unique rock mineral derived from an ancient volcanic deposit, characterised by its high cation exchange capacity (CEC) — meaning it can hold and buffer a large number of nutrients in the soil. It also contains a wide range of trace minerals, making it a valuable addition to any soil blend and a key component alongside other rock mineral inputs like Azomite and volcanic ash.\u003c\/p\u003e\n\u003cp\u003eThe benefits are broad: palagonite improves soil structure and drainage, holds and buffers nutrients, provides a wide range of trace minerals, detoxifies and balances the soil, improves water retention, and supports the growth of beneficial microbes. Compared to basalt, it offers faster mineral release with less pH buffering effect, making it more versatile in mixes where you don't want to shift pH significantly.\u003c\/p\u003e","brand":"Soil Supply Co.","offers":[{"title":"500g","offer_id":48918020849904,"sku":"PALAG-500G","price":8.0,"currency_code":"AUD","in_stock":false},{"title":"1kg","offer_id":48918020882672,"sku":"PALAG-1KG","price":14.0,"currency_code":"AUD","in_stock":false},{"title":"2.5kg","offer_id":48918020915440,"sku":"PALAG-2.5KG","price":28.0,"currency_code":"AUD","in_stock":false},{"title":"5kg","offer_id":48918020948208,"sku":"PALAG-5KG","price":50.0,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0823\/1262\/6416\/files\/palagonite-441666.jpg?v=1772156689"},{"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":true},{"title":"1kg","offer_id":48918021144816,"sku":"VOLCASH-1KG","price":9.0,"currency_code":"AUD","in_stock":true},{"title":"2.5kg","offer_id":48918021177584,"sku":"VOLCASH-2.5KG","price":17.0,"currency_code":"AUD","in_stock":true},{"title":"5kg","offer_id":48918021210352,"sku":"VOLCASH-5KG","price":30.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0823\/1262\/6416\/files\/volcanic-ash-895006.jpg?v=1783325497"},{"product_id":"azomite","title":"Azomite","description":"\u003cp\u003eAzomite is a genuine, bonafide calcium-aluminosilicate rock mineral mined from a single unique deposit in Utah — the only source of its kind in the world. Widely used and highly regarded, it contains a full spectrum of trace minerals from A to Z, in a combination not found in any other deposit globally. The Azomite we stock is highly micronised, making it quickly bioavailable to plants and soil biology alike.\u003c\/p\u003e\n\u003cp\u003eThe mineral profile includes boron, calcium, chlorine, cobalt, copper, iron, magnesium, molybdenum, phosphorus, potassium, silicon, sodium, sulphur, and zinc — all of importance in growing strong, healthy, high-yielding plants. We use Azomite in our mixes alongside other rock mineral inputs such as palagonite and volcanic ash, finding that the extra coverage it delivers really rounds out a soil and covers bases that single-mineral amendments can't. Anecdotally, many keen users report increases in quality, and we've personally found it seems to wake up microbes and get them active fast.\u003c\/p\u003e","brand":"Soil Supply Co.","offers":[{"title":"500g","offer_id":48918021538032,"sku":"AZOMITE-500G","price":8.0,"currency_code":"AUD","in_stock":true},{"title":"1kg","offer_id":48918021570800,"sku":"AZOMITE-1KG","price":15.0,"currency_code":"AUD","in_stock":true},{"title":"2.5kg","offer_id":48918021603568,"sku":"AZOMITE-2.5KG","price":32.5,"currency_code":"AUD","in_stock":true},{"title":"5kg","offer_id":48918021636336,"sku":"AZOMITE-5KG","price":60.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0823\/1262\/6416\/files\/azomite.png?v=1782526524"},{"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":"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":"washed-perlite","title":"Washed Perlite","description":"\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eWashed Perlite is a pre-washed, dust-minimised additive used to improve drainage and aeration in growing media. Perlite starts life as a natural volcanic glass, but the white granules in the bag are manufactured, not mined: the raw ore is heated until the water trapped inside flashes to steam and puffs it up like popcorn, expanding it many times over into the lightweight material growers know. Unlike standard perlite straight from the bag, our washed perlite has had the fines removed — eliminating the clouds of irritating dust that make regular perlite unpleasant to work with, and reducing the amount of powdered material that can clog soil pores and impede drainage over time.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eAvailable in two grades — coarse and jumbo — so you can match the particle size to your specific application. Coarse grade is the all-rounder for general potting mixes and containers. Jumbo grade provides maximum airflow and drainage for large containers, raised beds, or mixes that need serious compaction resistance. Both grades are extremely lightweight, making them ideal for situations where keeping overall mix weight down is a priority — rooftop gardens, hanging baskets, or any container that needs to be moved.\u003c\/p\u003e","brand":"Soil Supply Co.","offers":[{"title":"5L \/ Coarse","offer_id":49818575044848,"sku":"PERLITE-COARSE-5L","price":11.0,"currency_code":"AUD","in_stock":true},{"title":"5L \/ Jumbo","offer_id":49818575077616,"sku":"PERLITE-JUMBO-5L","price":12.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0823\/1262\/6416\/files\/coarseperlite.png?v=1783391219"},{"product_id":"pumice","title":"Pumice","description":"\u003cp data-start=\"2709\" data-end=\"3154\" class=\"PDq2pG_selectionAnchorContainer\"\u003ePumice is a natural volcanic rock used to improve drainage, aeration, and structural integrity in growing media. Unlike perlite, which is an expanded volcanic glass, pumice is a naturally porous volcanic mineral that retains its structure without additional processing. Its higher density means it is far less likely to migrate or float to the surface of your mix over time, providing long-lasting, reliable aeration throughout the soil profile.\u003cspan aria-hidden=\"true\" class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"3159\" data-end=\"3698\"\u003eAvailable in two grades — fine (1–6 mm average) and coarse (7–20 mm average) — you can tailor the particle size to suit your application. Fine grade is ideal for potting mixes, seed-raising blends, and containers where moderate aeration is needed without creating large air spaces. Coarse grade delivers greater drainage and airflow for large containers, raised beds, bottom-of-pot drainage layers, or any mix that requires maximum resistance to compaction. The two grades can also be blended to create a custom particle size distribution.\u003c\/p\u003e\n\u003cp data-start=\"3703\" data-end=\"4222\"\u003eAs a natural volcanic mineral, pumice contains silica and naturally occurring trace minerals, although these become available only very slowly as the rock gradually weathers. It also has a modest cation exchange capacity (CEC), allowing it to retain small amounts of positively charged nutrients and help reduce nutrient leaching—something perlite provides little capacity for. Extremely durable and resistant to breakdown, pumice maintains its structure for many years and can be reused across multiple growing cycles.\u003c\/p\u003e","brand":"Soil Supply Co.","offers":[{"title":"Fine \/ 5L","offer_id":50035025379568,"sku":"PUMICE-FINE-5L","price":16.0,"currency_code":"AUD","in_stock":true},{"title":"Fine \/ 20L","offer_id":50035025412336,"sku":"PUMICE-FINE-20L","price":55.0,"currency_code":"AUD","in_stock":true},{"title":"Coarse \/ 5L","offer_id":50035025445104,"sku":"PUMICE-COARSE-5L","price":16.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0823\/1262\/6416\/files\/pumicefine.png?v=1784199999"}],"url":"https:\/\/soilsupply.co\/collections\/silica.oembed","provider":"Soil Supply Co.","version":"1.0","type":"link"}