{"product_id":"cultiwool-loose-rockwool-mini-cubes","title":"Cultiwool Loose Rockwool Mini Cubes – Hydroponic Grow Cubes","description":"\u003ch2\u003eSmall cubes, plenty of air: a free-draining rockwool fill for pots and propagation\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eCultiwool Loose Rockwool Mini Cubes\u003c\/strong\u003e are \u003cstrong\u003e10 x 10 x 10mm\u003c\/strong\u003e cubes of Cultiwool stone wool, sold loose for filling pots, trays and containers. Each little cube is a fibrous block that soaks up water and nutrient solution, while the gaps between the cubes stay open to air, so the root zone holds moisture without going stale. Use them on their own, or mix them with \u003cstrong\u003eclay pebbles\u003c\/strong\u003e to build your own free-draining blend for hydroponic and drip-fed pots. Like every Cultiwool product they are an \u003cstrong\u003einert, pathogen-free\u003c\/strong\u003e medium, so the feed you give is the only feed the roots see.\u003c\/p\u003e\n\u003ch3\u003eKey Benefits\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e10mm cubes\u003c\/strong\u003e - small enough to settle round a root ball or a rooted cube, large enough to leave open air gaps between them.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWater and air together\u003c\/strong\u003e - the stone wool fibre holds the solution while the spaces between cubes keep oxygen at the roots.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuick drainage\u003c\/strong\u003e - suits short, frequent feeds in drip-fed and run-to-waste pots.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUse alone or blended\u003c\/strong\u003e - fill pots with cubes only, or mix with clay pebbles or other media for your own recipe.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInert and clean\u003c\/strong\u003e - no added nutrients and no pathogens, nothing to work against your feed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLight to handle\u003c\/strong\u003e - dry cubes weigh very little, so filling a run of containers is quick work.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhy Do Roots Stall in a Waterlogged Pot?\u003c\/h3\u003e\n\u003cp\u003eRoots need oxygen as much as water. A dense medium that stays wet pushes the air out, root development stops, nutrient uptake slows and the plant sits still; too open a mix and the pot dries out between feeds. Loose mini cubes split the difference. The fibre inside each cube holds the water and feed, while the channels between cubes drain quickly and refill with air after every irrigation. That steady air-to-water balance is what keeps roots growing and plant health on track from transplant to the end of the cycle.\u003c\/p\u003e\n\u003ch3\u003eHow to Use\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePre-wet:\u003c\/strong\u003e soak the cubes through with pH-adjusted water or a weak feed before planting - dry stone wool wets unevenly at first.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFill:\u003c\/strong\u003e fill pots, containers or net pots to your usual depth, on their own or over a drainage layer of clay pebbles.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlant:\u003c\/strong\u003e set rooted cuttings, plugs or small rockwool cubes into the fill and settle the loose cubes around them.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeed little and often:\u003c\/strong\u003e short, frequent irrigations suit a fast-draining fill; check the runoff so the medium stays moist rather than saturated.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"hcs-specs\"\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Cultiwool\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct:\u003c\/strong\u003e Loose rockwool mini cubes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCube size:\u003c\/strong\u003e 10 x 10 x 10mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Cultiwool stone wool (rockwool), made in Europe, RHP certified\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProperties:\u003c\/strong\u003e Inert and pathogen free\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUse:\u003c\/strong\u003e Loose fill for pots, containers and net pots; propagation and growing on; can be mixed with clay pebbles\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSuits:\u003c\/strong\u003e Hydroponic, drip-fed and run-to-waste growing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cdiv class=\"hcs-faq\"\u003e\n\u003cdetails style=\"border:1px solid #e6e6e6;border-radius:8px;padding:12px 16px;margin:0 0 8px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;\"\u003eDo the cubes need soaking before use?\u003c\/summary\u003e\u003cp style=\"margin:10px 0 0;\"\u003eYes. Wet them right through with pH-adjusted water or a weak feed before planting. Dry stone wool takes up water unevenly at first, so a thorough pre-soak gives every pot an even start.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"border:1px solid #e6e6e6;border-radius:8px;padding:12px 16px;margin:0 0 8px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;\"\u003eCan I mix them with clay pebbles?\u003c\/summary\u003e\u003cp style=\"margin:10px 0 0;\"\u003eYes. They can be used on their own or mixed with other media such as clay pebbles. A layer of pebbles in the base of the pot adds drainage, and pebbles mixed through the cubes open the blend up for more air.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"border:1px solid #e6e6e6;border-radius:8px;padding:12px 16px;margin:0 0 8px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;\"\u003eHow are these different from Cultiwool Mapito?\u003c\/summary\u003e\u003cp style=\"margin:10px 0 0;\"\u003eMapito is granulated loose rockwool that settles in the pot as one mass, and it is the one to choose for growing plants on in pots and troughs. The mini cubes are separate 10mm cubes that keep their shape through handling and irrigation, which suits propagation and early growth, and they are often mixed with clay pebbles. Both are Cultiwool stone wool and both go straight into pots.\u003c\/p\u003e\u003c\/details\u003e\n\u003c\/div\u003e\n\u003ch3\u003eWorks Well With\u003c\/h3\u003e\n\u003cdiv class=\"hcs-related\" style=\"display:flex;flex-wrap:wrap;gap:10px;margin:12px 0 0;\"\u003e\n\u003ca href=\"\/products\/canna-aqua-clay-pebbles-45l\" style=\"flex:1 1 240px;display:flex;align-items:center;gap:12px;padding:10px 12px;border:1px solid #e6e6e6;border-radius:8px;text-decoration:none;color:inherit;background:#fff;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0748\/7127\/5786\/files\/grow-media-canna-aqua-clay-pebbles-45l-29882528334008.webp?v=1783879284\u0026amp;width=160\" alt=\"Canna Aqua Clay Pebbles 45L\" width=\"64\" height=\"64\" loading=\"lazy\" style=\"width:64px;height:64px;object-fit:contain;flex:none;\"\u003e\u003cspan style=\"font-size:14px;line-height:1.4;\"\u003e\u003cstrong style=\"display:block;\"\u003eCanna Aqua Clay Pebbles 45L\u003c\/strong\u003e\u003cspan style=\"color:#008d37;\"\u003eMix in or layer beneath for drainage\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e\n\u003ca href=\"\/products\/growth-technology-ph-down\" style=\"flex:1 1 240px;display:flex;align-items:center;gap:12px;padding:10px 12px;border:1px solid #e6e6e6;border-radius:8px;text-decoration:none;color:inherit;background:#fff;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0748\/7127\/5786\/files\/PH-Down-1L-medium_landscape.jpg?v=1746904406\u0026amp;width=160\" alt=\"Growth Technology PH Down 81%\" width=\"64\" height=\"64\" loading=\"lazy\" style=\"width:64px;height:64px;object-fit:contain;flex:none;\"\u003e\u003cspan style=\"font-size:14px;line-height:1.4;\"\u003e\u003cstrong style=\"display:block;\"\u003eGrowth Technology PH Down 81%\u003c\/strong\u003e\u003cspan style=\"color:#008d37;\"\u003eSets the pH of the pre-soak water\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e\n\u003c\/div\u003e","brand":"Cultiwool","offers":[{"title":"200 Litre Box","offer_id":53931119411466,"sku":"HYD-CULT-001-01","price":167.65,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0748\/7127\/5786\/files\/cultiwool-loose-rockwool-mini-cubes-200-litre-box-1.jpg?v=1792296001","url":"https:\/\/hydrocropshop.co.uk\/products\/cultiwool-loose-rockwool-mini-cubes","provider":"Hydro Crop Shop","version":"1.0","type":"link"}