--- product_id: 7142374 title: "49 Rockwool Grow Cubes (1.5 Inches) - Growing Medium Starter Sheets (49 Per Pack)" brand: "stacky cubes" price: "€ 42.78" currency: EUR in_stock: true reviews_count: 8 category: "Stacky Cubes" url: https://www.desertcart.pt/products/7142374-49-rockwool-grow-cubes-1-5-inches-growing-medium-starter store_origin: PT region: Portugal --- # Superior water retention 20% air space for oxygenation 1.5" cubic precision 49 Rockwool Grow Cubes (1.5 Inches) - Growing Medium Starter Sheets (49 Per Pack) **Brand:** stacky cubes **Price:** € 42.78 **Availability:** ✅ In Stock ## Summary > 🌱 Grow smarter, not harder — root like a pro with Rockwool! ## Quick Answers - **What is this?** 49 Rockwool Grow Cubes (1.5 Inches) - Growing Medium Starter Sheets (49 Per Pack) by stacky cubes - **How much does it cost?** € 42.78 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/7142374-49-rockwool-grow-cubes-1-5-inches-growing-medium-starter) ## Best For - stacky cubes enthusiasts ## Why This Product - Trusted stacky cubes brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Oxygen Boost:** 20% air space saturation keeps roots oxygenated for healthier plants - • **Trusted by Pros:** Preferred by top industrial propagators worldwide for unmatched quality - • **Sterile & Strong:** Inorganic, sterile medium guarantees contamination-free, firm rooting - • **Precision Perfect:** Uniform 1.5" cubes ensure consistent propagation every time - • **Rooting Revolution:** Encourages rapid initial root growth with optimal air-to-water ratio ## Overview These 49 Rockwool Grow Cubes (1.5" each) offer a sterile, inorganic growing medium engineered for superior root development. With a perfect balance of 20% air space and excellent water retention, they accelerate initial rooting while maintaining firmness. Trusted globally by industrial propagators, these cubes provide consistent, contamination-free propagation for healthier, faster-growing plants. ## Description The manufacturer has many years of experience developing Rockwool products in the Netherlands and is preferred by some of the largest industrial propagators in the world. The quality of their newest Rockwool cubes, plugs, and starter sheets is by far the best on the market with superb air to water ratio and a fiber structure that holds water longer and has less resistance for the roots to grow in, resulting in stronger roots. Rockwool also encourages faster initial rooting and its firmness is guaranteed. Blocks measure 1.5” x 1.5” x 1.5” Review: Reliable and cheap - These work great as long as they stay intact. Do not shred them to make filler or they will disintegrate and clog up your pumps or hoses. Review: Soft and useful - product itself is easy to use. plants grew healthy and nice and fitted my ycube. Thanks ## Features - Inorganic & Sterile Growing Medium - A Superior Medium For Rooting Cuttings - Encourages Faster Initial Rooting & Its Firmness Is Guaranteed - Provides 20% Air Space When Saturated - Absorbs nutrient solution while retaining plenty of oxygen for rapid root growth! - Cubes Measure: 1.5" x 1.5" x 1.5" ## Technical Specifications | Specification | Value | |---------------|-------| | Customer Reviews | 4.4 out of 5 stars 2,026 Reviews | ## Images ![49 Rockwool Grow Cubes (1.5 Inches) - Growing Medium Starter Sheets (49 Per Pack) - Image 1](https://m.media-amazon.com/images/I/51cXQiq+KkL.jpg) ## Questions & Answers **Q: Can you put seeds in the rockwool to start a plant? I am new to hydroponics? Thank you** A: Yes. That is it's purpose. Put the seed in the sidewall of the whole, pinch off a tiny piece of rockwool and cover the hole. Don't cram the piece into the hole. **Q: Still havnt received my order and i am unable to track it.** A: Yes you can track it. The email you supply when you ordered your item has the tracking number on it. The same email will let you know that them item is being shipped and it will also tell you when it's delivered. Tip: check your spam mail. **Q: Can these be used with the Ivation brand garden?** A: Yes, rockwool would be a medium you could use to plan seeds, then place in the net pot (basket) that comes with the system. You might have to cut them down (they are 1" x 1" x 1") to fit this brand. However I have found that General Hydroponics Rapid Rooter Replacement Plugs work better because they come with nutrients infused in the plugs to help start the seeds. But rockwool will also work. **Q: Has anyone used these in the Gardyn system?** A: I've used these in my Tower Garden for several years and they are perfect for this system. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Reliable and cheap *by S***W on October 27, 2025* These work great as long as they stay intact. Do not shred them to make filler or they will disintegrate and clog up your pumps or hoses. ### ⭐⭐⭐⭐⭐ Soft and useful *by B***. on December 7, 2023* product itself is easy to use. plants grew healthy and nice and fitted my ycube. Thanks ### ⭐⭐⭐⭐ Use pH down NOT lemon *by E***L on April 6, 2023* I started using lettuce seeds in this rockwool as I wanted to start growing the lettuce hydroponically. People online would state that you have to use lemon with water on them. Just enough to alter the pH level due to the way they process this product. Well, the sun does a number on lemon and the pH is not stable when that happens. It also, in my experience, promotes mold growth especially when you have to keep them damp and humid to get the seeds to sprout. I had to toss the first batch using lemon and started using pH down. Mix your water with the pH down to get to the level you need and then soak the rockwool. What a difference! No mold. No smell. And, the seeds looked super healthy and sprouted fast. I also cut the 1.5 size in half horizontally which worked better as well and gave me more pods to start seeds from. ## Frequently Bought Together - 49 Rockwool Grow Cubes (1.5 Inches) - Growing Medium Starter Sheets (49 Per Pack) - General Hydroponics pH Control Kit For A Balanced Nutrient Solution - HAZOULEN Small Garden Plastic Net Cups Pots Fits in 2 Inch Holes, Set of 40 --- ## 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/7142374-49-rockwool-grow-cubes-1-5-inches-growing-medium-starter](https://www.desertcart.pt/products/7142374-49-rockwool-grow-cubes-1-5-inches-growing-medium-starter) --- *Product available on Desertcart Portugal* *Store origin: PT* *Last updated: 2026-07-29*