---
product_id: 170254953
title: "Grodan Rockwool Delta GRO Blocks | 4\" Cube - Pack of 6 | + Twin Canaries Chart"
brand: "twin canaries liquid volume conversion chart"
price: "€ 75.50"
currency: EUR
in_stock: true
reviews_count: 8
category: "Twin Canaries Liquid Volume Conversion Chart"
url: https://www.desertcart.fi/products/170254953-grodan-rockwool-delta-gro-blocks-4-cube-pack-of-6
store_origin: FI
region: Finland
---

# pre-formed starter plug holes balanced water & air flow 4-inch precision cube size Grodan Rockwool Delta GRO Blocks | 4" Cube - Pack of 6 | + Twin Canaries Chart

**Brand:** twin canaries liquid volume conversion chart
**Price:** € 75.50
**Availability:** ✅ In Stock

## Summary

> 🧱 Grow smarter, not harder—rock your roots with Grodan!

## Quick Answers

- **What is this?** Grodan Rockwool Delta GRO Blocks | 4" Cube - Pack of 6 | + Twin Canaries Chart by twin canaries liquid volume conversion chart
- **How much does it cost?** € 75.50 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.fi](https://www.desertcart.fi/products/170254953-grodan-rockwool-delta-gro-blocks-4-cube-pack-of-6)

## 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

- • **Root Powerhouse:** 4-inch blocks provide superior root stability for medium to large plants.
- • **Plug & Play Growth:** Start seeds or rooted plugs directly—no extra containers needed.
- • **Clean & Efficient Planting:** Pre-formed holes fit starter plugs perfectly for hassle-free setup.
- • **Optimized Moisture Control:** Engineered fibers balance water retention and aeration to prevent overwatering.
- • **Versatile Hydroponic Medium:** Ideal for full-cycle growth indoors with moderate watering needs.

## Overview

Grodan Rockwool Delta GRO Blocks are premium 4-inch hydroponic grow cubes designed for seamless seed starting and full-cycle plant growth. Featuring pre-formed holes for starter plugs and engineered fibers for balanced moisture and aeration, these natural, organic blocks support robust root development and efficient nutrient uptake—perfect for indoor gardeners seeking clean, container-free cultivation.

## Description

desertcart.com : Grodan Rockwool Delta GRO Blocks | 4" Cube - Pack of 6 | + Twin Canaries Chart : Patio, Lawn & Garden

Review: Great - Perfect
Review: Grodan is top quality rockwool - These cubes came packaged well in a plastic wrap. These are genuine Grodam rockwool cubes and are very high quality!

## Features

- Grodan 4" Rockwool Grow Blocks – Versatile hydroponic medium that supports direct planting—start seeds or insert rooted plugs straight into the block for full-cycle growth.
- Grow Directly in the Blocks – Designed to be a standalone growing medium; no additional containers or soil required for many crops.
- Perfect Fit for Starter Plugs – Features pre-formed holes that snugly accommodate A-OK or macro starter plugs for clean, efficient planting.
- Superior Root Stability & Nutrient Access – The 4-inch size offers strong support for medium to large plants, promoting robust root development and efficient nutrient uptake.
- Balanced Water & Air Distribution – Engineered rockwool fibers ensure even moisture retention and aeration, minimizing overwatering risks while maximizing performance.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0812XYTKN |
| Best Sellers Rank | #34,600 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #209 in Plant Cages & Supports #919 in Garden Fertilizers |
| Brand | Twin Canaries Liquid Volume Conversion Chart |
| Color | Brown |
| Customer Reviews | 4.7 4.7 out of 5 stars (438) |
| Indoor/Outdoor Usage | Indoor |
| Item Weight | 13.4 ounces |
| Manufacturer | Twin Canaries Liquid Volume Conversion Chart |
| Material Feature | Natural |
| Moisture Needs | Moderate Watering |
| Number of Pieces | 6 |
| Package Dimensions | 11.81 x 7.83 x 3.98 inches |
| Product Care Instructions | Water |
| Soil Type | Sandy Soil |
| Special Feature | organic |
| Sunlight Exposure | Partial Sun |
| Unit Count | 6.0 Count |

## Product Details

- **Brand:** Twin Canaries Liquid Volume Conversion Chart
- **Color:** Brown
- **Indoor/Outdoor Usage:** Indoor
- **Material Feature:** Natural
- **Moisture Needs:** Moderate Watering
- **Product Care Instructions:** Water
- **Soil Type:** Sandy Soil
- **Special Feature:** organic
- **Sunlight Exposure:** Partial Sun
- **Unit Count:** 6.0 Count

## Images

![Grodan Rockwool Delta GRO Blocks | 4" Cube - Pack of 6 | + Twin Canaries Chart - Image 1](https://m.media-amazon.com/images/I/71riOuF1x4L.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great
*by T***S on October 11, 2025*

Perfect

### ⭐⭐⭐⭐⭐ Grodan is top quality rockwool
*by J***S on March 25, 2024*

These cubes came packaged well in a plastic wrap. These are genuine Grodam rockwool cubes and are very high quality!

### ⭐⭐⭐⭐⭐ Great for the price
*by D***R on January 3, 2025*

Not much to say, works great for the price. Only needed 4 so used one of the extras to create a plug for the center.

## Frequently Bought Together

- Grodan Rockwool Delta GRO Blocks | 4" Cube - Pack of 6 | + Twin Canaries Chart
- Grodan Rockwool Starter Mini-Blocks | 1.5" Blocks - Pack of 45 | + Twin Canaries Chart
- General Hydroponics Rapid Rooter, Starter Plug for Seeds or Cuttings, Great for Soil or Hydroponics Growing System, 50 Plugs

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**Shop now:** [https://www.desertcart.fi/products/170254953-grodan-rockwool-delta-gro-blocks-4-cube-pack-of-6](https://www.desertcart.fi/products/170254953-grodan-rockwool-delta-gro-blocks-4-cube-pack-of-6)

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*Product available on Desertcart Finland*
*Store origin: FI*
*Last updated: 2026-03-04*