{"product_id":"kiryuzuna","title":"Kiryuzuna","description":"\u003cp\u003eKiryuzuna is a premium Japanese volcanic substrate mined from ancient deposits near Kiryu City in the Akagi Mountains, Gunma Prefecture. Prized by bonsai growers and orchid enthusiasts worldwide for its exceptional drainage and durability.\u003c\/p\u003e\n\n\u003cp\u003eRich in iron oxide (Fe₂O₃), Kiryuzuna offers outstanding drainage and aeration while retaining enough moisture within its porous particles for healthy root development. Harder and more angular than Akadama, it resists breaking down over time and has no tendency to compact, meaning less frequent repotting. Substrate typically lasts around 3 years before needing replacement.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eBest suited for:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eOrchids, including oriental orchids\u003c\/li\u003e\n\u003cli\u003eBonsai, especially pine and juniper (the first choice for conifer repotting)\u003c\/li\u003e\n\u003cli\u003eWeakened or sick pine bonsai (potting in pure Kiryuzuna is advisable for recovery)\u003c\/li\u003e\n\u003cli\u003eOrnamental plants and wildflowers\u003c\/li\u003e\n\u003cli\u003eGeneral potted plants (mixed with other potting soil)\u003c\/li\u003e\n\u003cli\u003eAs bottom stones for drainage in pots and planters\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eKey properties:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHigh water permeability, helping prevent root diseases after repotting\u003c\/li\u003e\n\u003cli\u003eExcellent air drainage, delivering more oxygen to roots\u003c\/li\u003e\n\u003cli\u003eNo tendency to soil compaction, very structurally stable\u003c\/li\u003e\n\u003cli\u003eSlightly acidic (pH ~6.5), ideal for acid-loving species\u003c\/li\u003e\n\u003cli\u003eRich in iron, calcium, and magnesium\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eHow to use:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eUse pure for conifer bonsai, orchids, and recovering trees. Mix with Akadama or other potting soil for general use (decide ratios case by case). A common bonsai mix is 70% Kiryuzuna + 30% Akadama for pines, or 30% Kiryuzuna + 70% Akadama for deciduous trees.\u003c\/p\u003e","brand":"Harwood's Garden Supplies","offers":[{"title":"3-6mm \/ 1L","offer_id":42092808667182,"sku":null,"price":19.9,"currency_code":"AUD","in_stock":true},{"title":"3-6mm \/ 2L","offer_id":42092808699950,"sku":null,"price":24.9,"currency_code":"AUD","in_stock":true},{"title":"3-6mm \/ 3L","offer_id":42092808732718,"sku":null,"price":29.9,"currency_code":"AUD","in_stock":true},{"title":"3-6mm \/ 4L","offer_id":42092808765486,"sku":null,"price":34.9,"currency_code":"AUD","in_stock":true},{"title":"3-6mm \/ 6L","offer_id":42092808798254,"sku":null,"price":49.9,"currency_code":"AUD","in_stock":true},{"title":"3-6mm \/ 16L - Full Bag","offer_id":42092808831022,"sku":null,"price":99.9,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0564\/8862\/4174\/files\/Kiryuzuna-3.png?v=1771623978","url":"https:\/\/www.harwoodsgardensupplies.com.au\/products\/kiryuzuna","provider":"Harwood's Garden Supplies","version":"1.0","type":"link"}