--- product_id: 101971004 title: "Grodan A-OK 1.5\" Rockwool Starter Plugs – 2 Half Sheets of 49 (Total 98 Plugs) – Made in The Netherlands – Includes Twin Canaries Chart" brand: "twin canaries liquid volume conversion chart" price: "€ 48.68" currency: EUR in_stock: true reviews_count: 9 category: "Twin Canaries Liquid Volume Conversion Chart" url: https://www.desertcart.pt/products/101971004-grodan-a-ok-1-5-rockwool-starter-plugs-2-half store_origin: PT region: Portugal --- # Optimized for even water distribution 2 half-sheets, 98 plugs total 1.5" precision Rockwool plugs Grodan A-OK 1.5" Rockwool Starter Plugs – 2 Half Sheets of 49 (Total 98 Plugs) – Made in The Netherlands – Includes Twin Canaries Chart **Brand:** twin canaries liquid volume conversion chart **Price:** € 48.68 **Availability:** ✅ In Stock ## Summary > 🌱 Elevate your hydroponic game with precision Rockwool plugs — grow smarter, not harder! ## Quick Answers - **What is this?** Grodan A-OK 1.5" Rockwool Starter Plugs – 2 Half Sheets of 49 (Total 98 Plugs) – Made in The Netherlands – Includes Twin Canaries Chart by twin canaries liquid volume conversion chart - **How much does it cost?** € 48.68 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/101971004-grodan-a-ok-1-5-rockwool-starter-plugs-2-half) ## Best For - twin canaries liquid volume conversion chart enthusiasts ## Why This Product - Trusted twin canaries liquid volume conversion chart brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Clean & Natural:** Made from natural basalt rock for a sterile, disease-free growing environment. - • **Hydroponic-Ready:** Engineered for seamless use in DWC, NFT, ebb & flow, and all soilless systems. - • **Fits Standard Trays:** Pre-formed holes fit perfectly into 10x20 propagation trays for fast setup. - • **Perfect Seed Start Size:** 1.5-inch plugs designed for ideal root development and easy handling. - • **Bonus Growth Chart Included:** Twin Canaries Liquid Volume Conversion Chart helps optimize nutrient delivery. ## Overview Grodan A-OK 1.5" Rockwool Starter Plugs come as two half-sheets totaling 98 plugs, crafted from natural basalt rock in The Netherlands. Designed for hydroponic and soilless growing systems, these plugs ensure even water distribution and fit standard propagation trays, making seed starting and cloning efficient and clean. Includes a Twin Canaries Liquid Volume Conversion Chart to optimize nutrient management. ## Description desertcart.com: Grodan A-OK 1.5" Rockwool Starter Plugs – 2 Half Sheets of 49 (Total 98 Plugs) – Made in The Netherlands – Includes Twin Canaries Chart : Patio, Lawn & Garden Review: Perfect for my indoor lettuce hydroponic system - Super easy to use. Break off one square, soak with water, stick a seed in the hole and pop it into my hydroponic system. Review: Easy to transition from seed to plant to hydroponic Tower Garden - Thank you for a great product that works well for my little seedlings! I got these last year's growing season and they held up very well, from seedling to plant--I got several harvests from my Tower Garden. ;-) ## Features - 98 Rockwool Cubes for Hydroponics – Includes two half-sheets of 49 plugs (98 total) for easy handling and efficient shipping. - 1.5" Rock Wool Planting Cubes – Perfect size for starting seeds and rooting cuttings in hydroponic growing systems or propagation trays. - Clean and Ready to Use – Made from natural basalt rock and designed to support even water distribution for reliable seed starting and root development. - Ideal for Hydroponics & Soilless Growing – Use with DWC, NFT, ebb and flow, or any hydroponic system for consistent, clean root zone management. - Fits Standard Trays – Each sheet fits into standard 10x20 propagation trays. Pre-formed holes make seed or clone placement fast and easy. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07KJVQ6T5 | | Best Sellers Rank | #30,126 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #40 in Hydroponic Growing Media | | Brand | Twin Canaries Liquid Volume Conversion Chart | | Date First Available | March 8, 2018 | | Is Discontinued By Manufacturer | No | | Item Form | Cubes | | Item Weight | 10.5 ounces | | Item model number | 1.5 A-OK Rockwool Starter Plugs | | Manufacturer | Twin Canaries Liquid Volume Conversion Chart | | Number of Items | 98 | | Package Dimensions | 10.16 x 9.92 x 3.31 inches | | Specific Uses For Product | Plant Growth | | Unit Count | 98.0 Count | ## Product Details - **Brand:** Twin Canaries Liquid Volume Conversion Chart - **Item Form:** Cubes - **Item Weight:** 0.3 Kilograms - **Manufacturer:** Twin Canaries Liquid Volume Conversion Chart - **Specific Uses For Product:** Plant Growth ## Images ![Grodan A-OK 1.5" Rockwool Starter Plugs – 2 Half Sheets of 49 (Total 98 Plugs) – Made in The Netherlands – Includes Twin Canaries Chart - Image 1](https://m.media-amazon.com/images/I/612khtl3zkL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Perfect for my indoor lettuce hydroponic system *by L***4 on December 2, 2025* Super easy to use. Break off one square, soak with water, stick a seed in the hole and pop it into my hydroponic system. ### ⭐⭐⭐⭐⭐ Easy to transition from seed to plant to hydroponic Tower Garden *by K***Y on April 19, 2023* Thank you for a great product that works well for my little seedlings! I got these last year's growing season and they held up very well, from seedling to plant--I got several harvests from my Tower Garden. ;-) ### ⭐⭐⭐⭐⭐ Nothing to complain about. Solid product *by S***J on November 11, 2021* Great rockwool as far as I’m concerned. Nothing to complain about. They are a bit soft and can fall apart easily, but I’m fine with that. There’s a balance I prefer between those super dense and hard rockwool plugs and ones that are thin and come apart easily. I’d say these ride that line in between pretty well. I don’t like my plugs to be too hard because I feel it inhibits root growth somewhat. Would order again. ## Frequently Bought Together - Grodan 1.5" Rockwool Starter Plugs, 2 Sheets of 49 Plugs (98 Plugs Total) + Twin Canaries Chart - VIVOSUN Digital pH and TDS Meter Kits, 0.01pH High Accuracy Pen Type pH Meter ± 2% Readout Accuracy 3-in-1 TDS EC Temperature Meter for Hydroponics, Pool and Aquarium, Yellow Blue, UL Certified - General Hydroponics pH Control Kit For A Balanced Nutrient Solution --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.pt/products/101971004-grodan-a-ok-1-5-rockwool-starter-plugs-2-half](https://www.desertcart.pt/products/101971004-grodan-a-ok-1-5-rockwool-starter-plugs-2-half) --- *Product available on Desertcart Portugal* *Store origin: PT* *Last updated: 2026-06-23*