{"product_id":"soil-ninja-biochar","title":"Soil Ninja Biochar – Fine Horticultural Biochar Flakes for Houseplants, Aroids \u0026 Semi-Hydro","description":"\u003cp\u003e\u003cstrong\u003e🔥 Type: Porous Carbon Soil Amendment\u003c\/strong\u003e\u003cbr\u003eGenuine Soil Ninja Biochar — fine biochar flakes. No added nutrients, no peat, no fillers — pure structure, porosity and root-zone hygiene for houseplants, aroids and semi-hydro set-ups.\u003c\/p\u003e\n\n\u003ch2\u003eSoil Ninja Biochar – Fine Horticultural Biochar for Houseplants, Aroids \u0026amp; Semi-Hydro\u003c\/h2\u003e\n\u003cp\u003eSoil Ninja Biochar is a favourite with UK houseplant growers — light, fine biochar flakes that slot neatly between bark, perlite, pumice and coco without leaving big voids. Black Flag Horticulture supplies genuine Soil Ninja Biochar and decants it by hand at our Coventry unit, so you can buy exactly the amount you need, from a 0.5L top-up to a 60L bulk bag.\u003c\/p\u003e\n\u003cp\u003eEach flake is a honeycomb of microscopic pores. That huge internal surface area holds air and moisture at the same time, gives beneficial bacteria and fungi somewhere to live, and helps soak up the impurities and stale odours that build up in wet, tired potting mixes.\u003c\/p\u003e\n\n\u003ch3\u003eWhy growers add biochar\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAeration \u0026amp; drainage:\u003c\/strong\u003e rigid flakes stop mixes collapsing and compacting, keeping oxygen around the roots and reducing the risk of root rot.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMoisture buffering:\u003c\/strong\u003e pores hold water and release it slowly, so mixes dry evenly instead of swinging from soggy to bone-dry.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMicrobe habitat:\u003c\/strong\u003e a stable home for beneficial soil life — pair with worm castings or mycorrhizae for a living mix.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCleaner root zone:\u003c\/strong\u003e helps adsorb impurities from tap water and fertiliser residues and reduces sour, swampy smells in closed pots and terrariums.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNutrient holding:\u003c\/strong\u003e high cation exchange capacity helps hold feed in the root zone rather than washing straight through.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLong-lasting:\u003c\/strong\u003e biochar is extremely stable — it doesn't rot down like bark or coir, so your mix keeps its structure for years.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePeat-free \u0026amp; sustainable:\u003c\/strong\u003e a stable form of carbon that stays locked in your soil instead of the atmosphere.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003ePerfect for\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAroids:\u003c\/strong\u003e Monstera, Philodendron, Anthurium, Alocasia, Syngonium, Pothos, Scindapsus.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSemi-hydro \u0026amp; LECA\/pon:\u003c\/strong\u003e mix 5–10% into LECA, pumice or mineral mixes to keep reservoirs fresher and reduce hard-water deposits.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOrchids:\u003c\/strong\u003e Phalaenopsis and other epiphytes — blend with bark and sphagnum for an open, sweet-smelling mix.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCarnivorous plants \u0026amp; terrariums:\u003c\/strong\u003e a nutrient-free, inert layer or mix-in for closed jars, bioactive vivariums and springtail cultures.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBonsai \u0026amp; cacti\/succulents:\u003c\/strong\u003e adds grit-like structure without the weight.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeeds \u0026amp; propagation:\u003c\/strong\u003e a light sprinkle in seed and cutting mixes helps keep compost open and fresh.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGarden soil improver:\u003c\/strong\u003e dig into beds, borders and containers to improve heavy clay or hungry sandy soils.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eRecommended mix ratios\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGeneral houseplant mix:\u003c\/strong\u003e 5–10% biochar.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChunky aroid mix:\u003c\/strong\u003e 10–15% biochar with bark, perlite and coco.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSemi-hydro \/ LECA:\u003c\/strong\u003e 5–10% biochar blended through.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOrchids:\u003c\/strong\u003e 10–20% biochar with bark.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTerrariums:\u003c\/strong\u003e a 1–2cm layer above the drainage layer, or 10–20% in the substrate.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGarden beds:\u003c\/strong\u003e roughly 1–2L per square metre, forked into the top 15cm.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow to use\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eRinse (optional):\u003c\/strong\u003e give it a quick rinse in a sieve to settle any fine dust — or wear a mask when mixing dry.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePre-soak:\u003c\/strong\u003e for semi-hydro, soak for a few hours so the pores are fully hydrated.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCharge (optional):\u003c\/strong\u003e soak in a dilute feed or worm-cast tea for 24 hours to \"charge\" it before mixing into soil.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMix \u0026amp; pot:\u003c\/strong\u003e blend evenly at the ratios above and pot up as normal.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eWhich size do I need?\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSample \/ 0.5L:\u003c\/strong\u003e try it, or top up a terrarium.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1L \/ 2.5L \/ 3L:\u003c\/strong\u003e enough to amend several small-to-medium pots.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e5L \/ 7.5L \/ 10L:\u003c\/strong\u003e a full repotting session or a growing collection.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e15L \/ 25L:\u003c\/strong\u003e serious collectors, plant shops and allotments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e40L \/ 60L:\u003c\/strong\u003e bulk and trade — mix your own blends at the best price per litre.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFAQs\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eIs biochar the same as activated charcoal?\u003c\/strong\u003e\u003cbr\u003eNo. Activated charcoal is processed for maximum adsorption and is usually very fine and dusty. Biochar is made specifically for soil — it's chunkier, cheaper per litre and better at building structure and supporting microbes.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes it contain fertiliser?\u003c\/strong\u003e\u003cbr\u003eNo. It's plain, uncharged biochar. Charge it yourself if you want a nutrient head start.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill it change my pH?\u003c\/strong\u003e\u003cbr\u003eBiochar is mildly alkaline. At 5–15% in a mix the effect is small; rinse before use for very acid-loving plants.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs it dusty?\u003c\/strong\u003e\u003cbr\u003eSome fines are natural. A quick rinse removes most of them.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs it safe for pets and vivariums?\u003c\/strong\u003e\u003cbr\u003eIt's a natural, inert carbon material commonly used in bioactive vivarium builds.\u003c\/p\u003e\n\n\u003cblockquote\u003e\u003cp\u003e\u003cb\u003ePlease note:\u003c\/b\u003e All sizes are hand-decanted at our Coventry unit from bulk Soil Ninja stock into our own sealed bags, then packed in reinforced outer packaging for safe transit. Natural product — flake size and colour vary slightly between batches.\u003c\/p\u003e\u003c\/blockquote\u003e\n\u003cp\u003eFast \u0026amp; Tracked UK Shipping | Genuine Soil Ninja Product | Peat-Free | Decanted Fresh in Coventry | Expert Support\u003c\/p\u003e\n","brand":"Soil Ninja","offers":[{"title":"Sample","offer_id":55050813768026,"sku":"BFH-NINJABC-SMPL","price":2.99,"currency_code":"GBP","in_stock":true},{"title":"0.5 Litres","offer_id":55050813800794,"sku":"BFH-NINJABC-0.5L","price":6.29,"currency_code":"GBP","in_stock":true},{"title":"1 Litre","offer_id":55050813833562,"sku":"BFH-NINJABC-1L","price":6.55,"currency_code":"GBP","in_stock":true},{"title":"2.5 Litres","offer_id":55050813866330,"sku":"BFH-NINJABC-2.5L","price":7.45,"currency_code":"GBP","in_stock":true},{"title":"3 Litres","offer_id":55050813899098,"sku":"BFH-NINJABC-3L","price":7.75,"currency_code":"GBP","in_stock":true},{"title":"5 Litres","offer_id":55050813931866,"sku":"BFH-NINJABC-5L","price":8.89,"currency_code":"GBP","in_stock":true},{"title":"7.5 Litres","offer_id":55050813964634,"sku":"BFH-NINJABC-7.5L","price":10.35,"currency_code":"GBP","in_stock":true},{"title":"10 Litres","offer_id":55050813997402,"sku":"BFH-NINJABC-10L","price":11.79,"currency_code":"GBP","in_stock":true},{"title":"15 Litres","offer_id":55050814030170,"sku":"BFH-NINJABC-15L","price":14.75,"currency_code":"GBP","in_stock":true},{"title":"25 Litres","offer_id":55050814062938,"sku":"BFH-NINJABC-25L","price":20.55,"currency_code":"GBP","in_stock":true},{"title":"40 Litres","offer_id":55050814095706,"sku":"BFH-NINJABC-40L","price":29.29,"currency_code":"GBP","in_stock":true},{"title":"60 Litres","offer_id":55050814128474,"sku":"BFH-NINJABC-60L","price":40.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0774\/9861\/4106\/files\/Soil-Ninja-Biochar-Premium-Houseplant-Potting-Soil-Component.webp?v=1792603181","url":"https:\/\/blackflaghorticulture.com\/products\/soil-ninja-biochar","provider":"Black Flag Horticulture","version":"1.0","type":"link"}