{"product_id":"pcs-grow-ab-hydroponic-nutrient-australia","title":"PCS Grow A \u0026 B | Complete 2-Part Vegetative Base Nutrient Australia","description":"\u003cdiv class=\"quick-answer-box\"\u003e\n\u003ch2 class=\"quick-answer-title\"\u003eQuick Answer\u003c\/h2\u003e\n\u003cul class=\"quick-answer-list\"\u003e\n\u003cli\u003eTwo part vegetative base, Grow A (NPK 2-0-0) and Grow B (NPK 2-2-6), covering the full nutrient spread a plant needs through veg.\u003c\/li\u003e\n\u003cli\u003eAdd Grow A to water first and mix well, then add Grow B. Never combine the two concentrates directly.\u003c\/li\u003e\n\u003cli\u003eFeed guide runs 3.5ml per litre weeks 1 to 3, stepping to 4ml per litre weeks 4 to 6. Treat this as a ceiling to build toward, not a starting dose.\u003c\/li\u003e\n\u003cli\u003eTarget EC depends on how dialled in your environment is and the cultivar you're running, use the feed guide dose as your reference point rather than chasing a fixed number. Target pH 5.8 to 6.2 throughout.\u003c\/li\u003e\n\u003cli\u003eSuits hydroponic, coco and soil systems.\u003c\/li\u003e\n\u003cli\u003eSizes: 1L, 5L, 20L, with 200L and 1000L available for commercial orders.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cp\u003e\u003cem\u003eAustralia's newest hydroponic nutrient line. Built with the highest quality minerals and made right here in Australia. The same level of mineral purity as the best imported brands, without the import price tag.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003cp\u003eNitrogen drives the leaf and stem growth a plant needs to build a functional canopy, but on its own it does not hold that structure together. Calcium is what actually strengthens developing cell walls as new growth forms, and magnesium sits at the centre of every chlorophyll molecule the plant produces to photosynthesise. PCS Grow A\u0026amp;B supplies all three from day one, Grow A carrying the nitrogen, Grow B carrying the calcium, potassium and magnesium.\u003c\/p\u003e\n\n\u003cp\u003eThat combination matters most in the situations where calcium and magnesium tend to fall short first, RO water, naturally soft tap water, or coco coir, where a plant fed on nitrogen alone can push out fast leaf growth that is structurally weak or pale at the margins before a deficiency is even obvious. Running Grow A\u0026amp;B together from week one means that structural and photosynthetic support is already in the feed rather than something added later once a symptom has appeared, which shows up as sturdier stems and more even leaf colour carrying through into flower.\u003c\/p\u003e\n\n\u003ch2\u003eHow to Use\u003c\/h2\u003e\n\u003cp\u003eAdd Grow A to your reservoir water first and mix thoroughly, then add Grow B and mix again. Keeping the two apart until they are diluted stops the calcium and phosphate compounds reacting before they have had a chance to dissolve properly. Check pH once both parts are in, since adding two concentrates will move the reading and it is rarely correct straight off the bat.\u003c\/p\u003e\n\u003cp\u003eThe feed guide runs 3.5ml per litre through weeks 1 to 3, then 4ml per litre from week 4 to week 6. Treat that top dose as a ceiling to build toward across the grow rather than a fixed starting dose, since how much a plant can actually use depends on how dialled in your environment is and the cultivar you're running, both of which shift through the different stages of veg. Start lower and work up as your root health and conditions prove stable. Flush with pH 6.0 adjusted water weekly from week 2 onward to stop residual salts building up between changes.\u003c\/p\u003e\n\n\u003ch2\u003eSuitable For\u003c\/h2\u003e\n\u003cp\u003eHydroponic, coco and soil systems.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Bought Together\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/pcs-bloom-ab-hydroponic-nutrient-australia\"\u003e\u003cstrong\u003ePCS Bloom A\u0026amp;B\u003c\/strong\u003e\u003c\/a\u003e, switch across once the plant moves into flower, the flowering counterpart to this base.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/pcs-seaweed-bio-stimulant-australia\"\u003e\u003cstrong\u003ePCS Seaweed\u003c\/strong\u003e\u003c\/a\u003e, runs alongside Grow A\u0026amp;B from week 1 at 2ml per litre, supports root activity rather than feeding N, P or K directly.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/pcs-cal-mag-fe-hydroponic-supplement-australia\"\u003e\u003cstrong\u003ePCS Cal-Mag + Fe\u003c\/strong\u003e\u003c\/a\u003e, part of the feed guide every week of veg, tops up calcium, magnesium and iron on top of what the base already carries.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/pcs-enzyme-root-zone-additive-australia\"\u003e\u003cstrong\u003ePCS Enzyme\u003c\/strong\u003e\u003c\/a\u003e, a root zone job rather than a feeding one, breaks down organic matter at the root line.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/bluelab-combo-meter-ph-ec-temperature-australia\"\u003e\u003cstrong\u003eBluelab Combo Meter\u003c\/strong\u003e\u003c\/a\u003e, the tool that actually confirms where pH and EC landed after mixing, rather than guessing.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eDo I mix Grow A and Grow B together, or one at a time?\u003c\/h3\u003e\n\u003cp\u003eAdd Grow A to water first and mix well, then add Grow B. Do not combine the two concentrates directly with each other before they are diluted, since the calcium in Grow A can react with phosphate in Grow B at full strength. Check and adjust pH once both parts are mixed in.\u003c\/p\u003e\n\u003ch3\u003eWhat EC should I run with PCS Grow A\u0026amp;B?\u003c\/h3\u003e\n\u003cp\u003eThere isn't a single fixed number to target. How much EC a plant can actually use depends on environmental stability and the cultivar you're running, which changes throughout veg, so build up gradually using the feed guide dose as your reference rather than feeding to a specific EC from day one.\u003c\/p\u003e\n\u003ch3\u003eIs PCS Grow A\u0026amp;B suitable for coco and soil, or hydro only?\u003c\/h3\u003e\n\u003cp\u003eIt is formulated for use across hydroponic, coco and soil cultivation.\u003c\/p\u003e\n\u003ch3\u003eWhat sizes does PCS Grow A\u0026amp;B come in?\u003c\/h3\u003e\n\u003cp\u003e1L, 5L and 20L are stocked here, with 200L and 1000L available directly from PCS for larger commercial setups.\u003c\/p\u003e\n\u003cp\u003eFor the full PCS range, browse the \u003ca href=\"\/collections\/premium-crop-solutions\"\u003ePremium Crop Solutions collection\u003c\/a\u003e.\u003c\/p\u003e","brand":"Premium Crop Solutions","offers":[{"title":"1L","offer_id":43703619518527,"sku":"PCS-GROWAB-1L","price":29.0,"currency_code":"AUD","in_stock":true},{"title":"5L","offer_id":43703619649599,"sku":"PCS-GROWAB-5L","price":85.0,"currency_code":"AUD","in_stock":true},{"title":"20L","offer_id":43703619682367,"sku":"PCS-GROWAB-20L","price":259.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/6898\/8479\/files\/1L_GrowA_thumb_8e1eefb8-996a-4e3a-9df6-86ab0c87fcee.png?v=1786652407","url":"https:\/\/apexgrow.com.au\/products\/pcs-grow-ab-hydroponic-nutrient-australia","provider":"Apex Grow","version":"1.0","type":"link"}