---
product_id: 224093562
title: "Rockwool Cubes 1 inch, Rock Wool Planting Cubes, Rock Wool for Hydroponic Growing, Perfect for Rooting, Cuttings, Cloning Plants, Seed Germination (4 Sheets, 200 Cubes Total)"
brand: "castlegreens"
price: "310 kr"
currency: DKK
in_stock: true
reviews_count: 8
category: "Castle Greens"
url: https://www.desertcart.dk/products/224093562-rockwool-cubes-1-inch-rock-wool-planting-cubes-rock-wool
store_origin: DK
region: Denmark
---

# 91% water retention Stable temperature control 96% porosity for oxygen flow Rockwool Cubes 1 inch, Rock Wool Planting Cubes, Rock Wool for Hydroponic Growing, Perfect for Rooting, Cuttings, Cloning Plants, Seed Germination (4 Sheets, 200 Cubes Total)

**Brand:** castlegreens
**Price:** 310 kr
**Availability:** ✅ In Stock

## Summary

> 🌱 Grow smarter, not harder—unlock your garden’s full potential with Rockwool Cubes!

## Quick Answers

- **What is this?** Rockwool Cubes 1 inch, Rock Wool Planting Cubes, Rock Wool for Hydroponic Growing, Perfect for Rooting, Cuttings, Cloning Plants, Seed Germination (4 Sheets, 200 Cubes Total) by castlegreens
- **How much does it cost?** 310 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.dk](https://www.desertcart.dk/products/224093562-rockwool-cubes-1-inch-rock-wool-planting-cubes-rock-wool)

## Best For

- castlegreens enthusiasts

## Why This Product

- Trusted castlegreens brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Effortless Transplanting:** Move your plants without stress—rockwool cubes let roots stay intact, ensuring seamless transitions and healthier growth.
- • **Year-Round Climate Control:** Maintain ideal root-zone temperatures indoors with rockwool’s unique thermal insulation—perfect for winter microclimates.
- • **Hydroponic Growth Accelerator:** Boost your plants’ growth by 30-50% faster than soil—because your greens deserve the VIP treatment.
- • **Unmatched Germination Success:** Achieve a 70% germination rate, outperforming traditional mediums by 40%—start strong, grow stronger.
- • **Superior Moisture & Aeration Balance:** With 91% water retention and 96% porosity, your roots get the perfect blend of hydration and oxygen—no more soggy or dry roots.

## Overview

CastleGreens Rockwool Cubes are premium 1-inch hydroponic planting cubes designed for superior seed germination, cloning, and rooting. Featuring 96% porosity and 91% water-holding capacity, they provide optimal moisture and oxygen balance, accelerating plant growth by up to 50%. Their stable thermal insulation ensures consistent root-zone temperatures, while easy transplanting minimizes plant stress. Ideal for indoor hydroponic systems, these 200 durable cubes deliver higher germination rates and crop yields, making them a must-have for serious growers.

## Description

desertcart.com : CastleGreens Rockwool Cubes 1 inch, Rock Wool Planting Cubes, Rock Wool for Hydroponic Growing, Perfect for Rooting, Cuttings, Cloning Plants, Seed Germination (4 Sheets, 200 Cubes Total) : Patio, Lawn & Garden

Review: 1st time with Rockwool super easy! - I have made 1,000 and 1,000 of clones with things like Root Riot and had great success. It's my first time with Rockwool and it works Great. Took a group of cuttings, mix 1/4 strength Lucus Forumla on top of the rockwool in a tray, poked a small hole, loaded my cuttings, put a dome on it under light and in 6-7 days I had roots. No rooting hormone was used. I left the rockwool pretty wet for the first 3 or 4 days and then drained it to stress the plants a bit. Talk about easy and cheap!
Review: Less mess, high quality and easy to sow seeds into - Great for seed starting and plants for fish tanks. Easy to put seeds in and easy to clean up after you remove your starters

## Features

- [96% POROSITY & 91% WATER-HOLDING ABILITY]- The density inside the rockwool gives it excellent moisture-retention and aeration properties. The unique moisture gradient from top to the base gives your plant access to the nutrient solution and oxygen. In addition, rockwool cubes for hydroponics has the ability to drain excess water, retaining just the right amount of water needed by your seeds to germinate. These abilities make the grow cubes ideal for delicate new growth
- [GREAT FOR HYDROPONICS]- The rockwool cubes is well-suited to hold moisture, and it will not break down through your grow cycle. It will remain strong and continue to efficiently retain water. This makes it ideal to use with hydroponic systems. The rockwool grow cubes can be used for starting seeds, growing vegetative and fruiting crops, both short and long-term. What's more, the plants grown in hydroponic media grow 30-50% faster than those grown in soil
- [HIGHER GERMINATION RATES & CROP YIELDS]- In a study comparing rock wool for plant to two other conventional hydroponic seed starter, rock wool seed starter came out on top. Plants seeded in the rock wool produced 70% germination rates as compared to the other tow hydroponic medium that each averages a 50% germination rate. Additionally, crop yields have been shown to be 30% higher in agricultural rock wool in shorter planting period
- [TEMPERATURE CONTROL]- The special inorganic fiber structure makes rockwool seed starter have unique and stable thermal insulation performance, which can reduce heat exchange caused by temperature difference, and the planting environment will maintain a constant temperature. Temperature is easy to control with agriculture rock wool in indoor hydroponics, and making a microclimate is highly beneficial, especially during winter when the temperature drops outside
- [QUICK & EASY TRANSPLANT]- The hydroponics rockwool cubes can be used for direct seeding, propagation by cuttings or transplanting. Plants can spend their entire lives in rock wool cubes or be transplanted from them into other hydroponic grow medium or containers. The plants need not be removed from the seed starter cubes, but cubes and all can be transplanted into their new home. This is far less disruptive for the plant and allows it to acclimate to its new home more quickly
- [PREPARATIONS BEFORE STARTING]- Before starting or transplanting any plants into your grow plugs, the initial wetting of hydroponic rockwool cubes is critical, ideally it should be immersed in a nutrient solution adjusted to pH 5.5-6.5, the immersion time is 24 hours. Doing this allows the nutrient solution to infiltrate all the tiny pores in the grow medium, ready for your plant to access, prepare the entire volume to be colonized by roots

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08F3BMC6W |
| Best Sellers Rank | #96,326 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #2,049 in Garden Fertilizers |
| Brand | CastleGreens |
| Color | Yellow |
| Date First Available | August 1, 2020 |
| Finish Type | Unfinished |
| Included Components | Tray, Saucer |
| Indoor/Outdoor Usage | Indoor |
| Item Weight | 15.8 ounces |
| Item model number | CG-200cubes |
| Manufacturer | CastleGreens |
| Material | Basalt, dolomite and a little slag |
| Mounting Type | Floor Standing |
| Number of Levels | 4 |
| Number of Pieces | 200 |
| Pattern | Solid |
| Planter Form | Tray |
| Product Dimensions | 1"D x 1"W x 1"H |
| Shape | Rectangular prism |
| Size | 1''-200Cubes |
| Special Feature | High Porosity, Excellent Water-Holding Ability, Temperature Control |
| Style | Modern |
| Theme | Vegetable |

## Product Details

- **Color:** Yellow
- **Material:** Basalt, dolomite and a little slag
- **Planter Form:** Tray
- **Special Feature:** High Porosity, Excellent Water-Holding Ability, Temperature Control
- **Style:** Modern

## Images

![Rockwool Cubes 1 inch, Rock Wool Planting Cubes, Rock Wool for Hydroponic Growing, Perfect for Rooting, Cuttings, Cloning Plants, Seed Germination (4 Sheets, 200 Cubes Total) - Image 1](https://m.media-amazon.com/images/I/71V79PMMwHL.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: once seed germinates can these be placed in a pot to grow?**
A: Yes

## Customer Reviews

### ⭐⭐⭐⭐⭐ 1st time with Rockwool super easy!
*by K***R on July 25, 2024*

I have made 1,000 and 1,000 of clones with things like Root Riot and had great success. It's my first time with Rockwool and it works Great. Took a group of cuttings, mix 1/4 strength Lucus Forumla on top of the rockwool in a tray, poked a small hole, loaded my cuttings, put a dome on it under light and in 6-7 days I had roots. No rooting hormone was used. I left the rockwool pretty wet for the first 3 or 4 days and then drained it to stress the plants a bit. Talk about easy and cheap!

### ⭐⭐⭐⭐⭐ Less mess, high quality and easy to sow seeds into
*by S***D on July 1, 2025*

Great for seed starting and plants for fish tanks. Easy to put seeds in and easy to clean up after you remove your starters

### ⭐⭐⭐⭐ Better than sponge medium
*by A***R on May 22, 2025*

Concept is there, takes long time for germination. But very malleable for transplant .. not bad

## Frequently Bought Together

- CastleGreens Rockwool Cubes 1 inch, Rock Wool Planting Cubes, Rock Wool for Hydroponic Growing, Perfect for Rooting, Cuttings, Cloning Plants, Seed Germination (4 Sheets, 200 Cubes Total)
- General Hydroponics pH Control Kit For A Balanced Nutrient Solution

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*Product available on Desertcart Denmark*
*Store origin: DK*
*Last updated: 2026-03-13*