---
product_id: 7142374
title: "49 Rockwool Grow Cubes (1.5 Inches) - Growing Medium Starter Sheets (49 Per Pack)"
brand: "stacky cubes"
price: "3757 kr"
currency: ISK
in_stock: true
reviews_count: 8
category: "Stacky Cubes"
url: https://www.desertcart.is/products/7142374-49-rockwool-grow-cubes-1-5-inches-growing-medium-starter
store_origin: IS
region: Iceland
---

# 49 precision 1.5" cubes Superior water retention & nutrient absorption 20% air space for oxygen-rich roots 49 Rockwool Grow Cubes (1.5 Inches) - Growing Medium Starter Sheets (49 Per Pack)

**Brand:** stacky cubes
**Price:** 3757 kr
**Availability:** ✅ In Stock

## Summary

> 🌿 Grow smarter, not harder — elevate your propagation game!

## 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?** 3757 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.is](https://www.desertcart.is/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

- • **Perfectly Sized:** Compact 1.5" cubes fit seamlessly into any propagation setup
- • **Root Like a Pro:** Engineered for rapid, robust root development with optimal air-to-water ratio
- • **Trusted by Experts:** Preferred by top industrial propagators worldwide for consistent quality
- • **Sterile & Inorganic:** Guaranteed contamination-free medium for healthier cuttings
- • **Firmness You Can Count On:** Maintains structure without shredding, ensuring smooth irrigation flow

## Overview

These 49 Rockwool Grow Cubes (1.5") offer a sterile, inorganic growing medium optimized for faster rooting and stronger plants. With a guaranteed 20% air space when saturated, they balance water retention and oxygen flow perfectly. Trusted by industrial propagators, these firm, uniform cubes ensure hassle-free propagation and healthier root systems.

## 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 2,024 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

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*Product available on Desertcart Iceland*
*Store origin: IS*
*Last updated: 2026-02-22*