---
product_id: 107008888
title: "1.5\" Grodan Rockwool Cubes for Seed Starter (98 Hydroponic Plugs) + The Hydroponic City Stakes"
brand: "the hydroponic city"
price: "€ 42.50"
currency: EUR
in_stock: true
reviews_count: 9
category: "The Hydroponic City"
url: https://www.desertcart.it/products/107008888-1-5-grodan-rockwool-cubes-for-seed-starter-98-hydroponic
store_origin: IT
region: Italy
---

# Optimal root aeration Superior water retention Sterile, pH-neutral basalt fiber 1.5" Grodan Rockwool Cubes for Seed Starter (98 Hydroponic Plugs) + The Hydroponic City Stakes

**Brand:** the hydroponic city
**Price:** € 42.50
**Availability:** ✅ In Stock

## Summary

> 🌿 Elevate your grow game with the ultimate hydroponic starter kit—because your plants deserve the best!

## Quick Answers

- **What is this?** 1.5" Grodan Rockwool Cubes for Seed Starter (98 Hydroponic Plugs) + The Hydroponic City Stakes by the hydroponic city
- **How much does it cost?** € 42.50 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.it](https://www.desertcart.it/products/107008888-1-5-grodan-rockwool-cubes-for-seed-starter-98-hydroponic)

## Best For

- the hydroponic city enthusiasts

## Why This Product

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

## Key Features

- • **Root Revolution:** Promotes rapid, healthy root development with perfect airflow—your plants’ secret weapon for vigorous growth.
- • **Hydro-Ready Hydration:** Engineered for maximum water retention to keep your seedlings thriving without constant watering.
- • **Mess-Free Propagation:** Simply wet, plant, and grow—no soil, no fuss, just clean, efficient seed starting.
- • **Sterile & Stable Medium:** Made from spun basalt rock, these cubes are pH-neutral and sterile, ensuring a contamination-free start every time.
- • **Versatile Growth Partner:** Ideal for seeds, clones, and cuttings across vegetables, herbs, flowers, and cannabis cultivation.

## Overview

The 1.5" Grodan Rockwool Cubes by The Hydroponic City offer 98 premium hydroponic plugs designed for superior water retention and root aeration. Made from sterile, pH-neutral spun basalt rock, these cubes provide a clean, mess-free medium ideal for seed starting, cloning, and soilless growing methods like hydroponics and aeroponics. Perfectly sized for germination trays and compatible with humidity domes, they support vigorous root development and healthy plant growth indoors.

## Description

desertcart.com : 1.5" Grodan Rockwool Cubes for Seed Starter (98 Hydroponic Plugs) + The Hydroponic City Stakes : Patio, Lawn & Garden

Review: Great for aquaponics - Perfect for my aquaponics vegetables garden. They do become a little less sturdy as the plants grow, but an easy fix with some string and plant clips. Our garden has been doing great for over a year
Review: Top quality - This is the real Rockwool, the good stuff. It doesn't fray or shred, if you halve the cubes, you can double your value. It's so dense and strong, great stuff for starting and growing hydro food.

## Features

- Ideal for Hydroponics and Soilless Growing - Rockwool cubes provide excellent water retention and air flow, making them perfect for hydroponic systems, aeroponics, and other soilless grow methods.
- Promotes Strong Root Development - Engineered for optimal root aeration, Grodan cubes encourage rapid and healthy root formation—ideal for seeds, clones, and cuttings.
- Easy to Use for Propagation - Simply wet, insert seeds or cuttings, and place in a tray or grow system. Grodan cubes maintain structure and moisture without mess or soil.
- Great for Seed Starting and Cloning- Perfectly sized for germination trays and humidity domes. Great for vegetables, herbs, flowers, and cannabis cultivation.
- Sterile and pH Neutral Growing Medium - Made from spun basalt rock, Grodan rockwool is an inert and sterile substrate with a balanced pH—ideal for supporting healthy root development from seed to transplant.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B078HC9DTQ |
| Best Sellers Rank | #17,434 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #23 in Hydroponic Growing Media #1,034 in Soils, Mulches & Planting Media |
| Brand | The Hydroponic City |
| Color | White |
| Customer Reviews | 4.4 4.4 out of 5 stars (409) |
| Indoor/Outdoor Usage | Indoor |
| Item Weight | 11.2 ounces |
| Manufacturer | The Hydroponic City |
| Material Feature | Natural |
| Number of Pieces | 98 |
| Product Dimensions | 1.5 x 1.5 x 0.04 inches |
| Special Feature | organic |
| Style | Tube |
| Unit Count | 1.0 Count |

## Product Details

- **Brand:** The Hydroponic City
- **Color:** White
- **Indoor/Outdoor Usage:** Indoor
- **Item Weight:** 11.18 ounces
- **Material Feature:** Natural
- **Number of Pieces:** 98
- **Special Feature:** organic
- **Style:** Tube
- **Unit Count:** 1.0 Count

## Images

![1.5" Grodan Rockwool Cubes for Seed Starter (98 Hydroponic Plugs) + The Hydroponic City Stakes - Image 1](https://m.media-amazon.com/images/I/7162ZHhFirL.jpg)

## Questions & Answers

**Q: Would these fit inside an aerogarden plastic cage?**
A: Yes if they are the small cages.

**Q: I bought this is it good for seeds?**
A: It is fantastic for germinating seeds,

**Q: Do these ship in packaging that prevents the plugs from being crushed during transportation?**
A: Yes. My plugs were not damaged at all.

**Q: Can these then be planted in soil outside and deteriorate?**
A: They can be, best if roots are extending out of it first, and if you leave a little bit of it sticking out of the soil. They won't deteriorate, rockwool is basalt rock that's been superheated and then spun like cotton candy

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great for aquaponics
*by C***E on December 7, 2025*

Perfect for my aquaponics vegetables garden. They do become a little less sturdy as the plants grow, but an easy fix with some string and plant clips. Our garden has been doing great for over a year

### ⭐⭐⭐⭐⭐ Top quality
*by O***S on November 12, 2025*

This is the real Rockwool, the good stuff. It doesn't fray or shred, if you halve the cubes, you can double your value. It's so dense and strong, great stuff for starting and growing hydro food.

### ⭐⭐⭐⭐⭐ These work great.
*by J***. on December 21, 2022*

So far these cubes have been the perfect medium for my plants. As long as I soak them for several hours in a ph adjusted solution to get their ph down, my seeds are germinating in 2 days. Very importantly, what I’ve read about other brands, these cubes don’t fall apart after soaking and their size works great with the net cups I use.

## Frequently Bought Together

- 1.5" Grodan Rockwool Cubes for Seed Starter (98 Hydroponic Plugs) + The Hydroponic City Stakes
- HydroDynamics Clonex Rooting Compound, 100 ml
- General Hydroponics pH Control Kit For A Balanced Nutrient Solution

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*Product available on Desertcart Italy*
*Store origin: IT*
*Last updated: 2026-02-25*