---
product_id: 18154755
title: "1.5\" x 1.5\" x 1.5\" Mini Blocks Grow Media Rockwool Stonewool Cube Propagation + Twin Canaries Chart - 15 Cubes"
brand: "grodan"
price: "€ 29.87"
currency: EUR
in_stock: true
reviews_count: 8
category: "Grodan"
url: https://www.desertcart.fi/products/18154755-1-5-x-1-5-x-1-5-mini-blocks
store_origin: FI
region: Finland
---

# Uniform root development Optimal air/water balance 1.5" cubic precision 1.5" x 1.5" x 1.5" Mini Blocks Grow Media Rockwool Stonewool Cube Propagation + Twin Canaries Chart - 15 Cubes

**Brand:** grodan
**Price:** € 29.87
**Availability:** ✅ In Stock

## Summary

> 🌿 Grow smarter, not harder — your roots deserve the best!

## Quick Answers

- **What is this?** 1.5" x 1.5" x 1.5" Mini Blocks Grow Media Rockwool Stonewool Cube Propagation + Twin Canaries Chart - 15 Cubes by grodan
- **How much does it cost?** € 29.87 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/18154755-1-5-x-1-5-x-1-5-mini-blocks)

## Best For

- grodan enthusiasts

## Why This Product

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

## Key Features

- • **Uniform Seed Holes:** Identically shaped plugs guarantee even root development and transplant success
- • **Robust Yet Flexible:** Durable rockwool structure adapts without breaking for easy handling
- • **Plug & Play Propagation:** Mini-Blocks sit flat without support—no extra trays needed
- • **Precision Perfect Cubes:** Consistent 1.5" x 1.5" x 1.5" blocks for flawless seed starting
- • **Balanced Growth Environment:** Engineered air/water ratio ensures thriving roots every time

## Overview

Grodan Mini Blocks are 1.5-inch rockwool cubes designed for superior seed and cutting propagation. Featuring optimal air and water balance, uniform seed holes, and robust yet flexible construction, these blocks promote consistent root development. Their unique flat-bottom design allows them to sit unsupported in trays, simplifying your growing setup and boosting early plant success.

## Description

Starter Mini-Blocks can sit in a tray (flat) without support for easy starting of seeds and cuttings. For best results put them on the flat side of the Gro-Smart Tray to ensure good airflow around the cubes. Remove wrapping and transplant into any loose media such as Grow-cubes or Grow-Chunks, or leave wrapping on and set on top of a larger Gro-Block. The advantage Mini-Blocks have over A-OK Starter Plugs and Macro Plugs is that Mini-Blocks can sit in a tray without any support.

Review: Works great - These work as they should. the price is a bit high but other than that, I recommend buying unless you can find them cheaper.
Review: Things grow right - I love these for planting seeds and transferring into pellet pots for an aeroponic system. The 1 1/2 inch ones seemed to be big enough for giving the roots a chance to grow and small enough to put in my coco pellet pots. Love them and will be ordering more.

## Features

- Improved homogeneity
- Optimum robustness and flexibility
- Ideal air/water balance
- Consistent shape of the seed hole
- Identically shaped plugs, Root development through the entire plug

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00XQEDDZ6 |
| Best Sellers Rank | #157,110 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #2,867 in Garden Fertilizers |
| Brand | Grodan |
| Customer Reviews | 4.4 4.4 out of 5 stars (356) |
| Is Discontinued By Manufacturer | No |
| Item Form | Square |
| Item Weight | 2.39 ounces |
| Item model number | 4316246501 |
| Liquid Volume | 1.5 Liters |
| Manufacturer | Grodan |
| Number of Items | 45 |
| Package Dimensions | 7.72 x 4.65 x 1.65 inches |
| Specific Uses For Product | Root Development |
| UPC | 638888607068 |
| Unit Count | 1.0 Count |

## Product Details

- **Brand:** Grodan
- **Item Form:** Square
- **Item Weight:** 0.07 Kilograms
- **Liquid Volume:** 1.5 Liters
- **Specific Uses For Product:** Root Development

## Images

![1.5" x 1.5" x 1.5" Mini Blocks Grow Media Rockwool Stonewool Cube Propagation + Twin Canaries Chart - 15 Cubes - Image 1](https://m.media-amazon.com/images/I/71F+F9z+y1L.jpg)

## Questions & Answers

**Q: Do these have any nutrition? For the seed like regular super soil**
A: No, you have to add nutrients to your water

**Q: How many days old would you transplant cannabis seedlings from these mini-cubes to 6x6? I’m thinking 3 weeks from seed?**
A: Anytime you don't have to wait the bigger the better put them outside will be just fine

**Q: Safe for aquarium fish?**
A: They are high in ph. Soak them in fresh water for a few hours and then rinse for a few minutes and the soul be fine and check your aquarium water and adjust the ph as you would normally

**Q: can you plant these in soil?**
A: Yes you can on a side note these are inert meaning no nutrients probably just a little cal/mag. Or just soak in water

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works great
*by U***W on August 2, 2024*

These work as they should. the price is a bit high but other than that, I recommend buying unless you can find them cheaper.

### ⭐⭐⭐⭐⭐ Things grow right
*by J***E on January 22, 2024*

I love these for planting seeds and transferring into pellet pots for an aeroponic system. The 1 1/2 inch ones seemed to be big enough for giving the roots a chance to grow and small enough to put in my coco pellet pots. Love them and will be ordering more.

### ⭐⭐⭐⭐⭐ Easy first foray into hydroponics
*by K***R on March 2, 2019*

I am just starting to experiment with hydroponics and this was my first experience with rock wool. These little cubes are much easier to use than I expected. It was a good price for what I considered a good size for my needs and I'm pleased with how well it's working out. I recommend this to anyone starting out as it's a small investment but with so much potential.

## Frequently Bought Together

- Grodan 1.5" x 1.5" x 1.5" Mini Blocks Grow Media Rockwool Stonewool Cube Propagation + Twin Canaries Chart - 15 Cubes
- HydroDynamics Clonex Rooting Compound, 100 ml
- General Hydroponics pH Control Kit For A Balanced Nutrient Solution

---

## 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.fi/products/18154755-1-5-x-1-5-x-1-5-mini-blocks](https://www.desertcart.fi/products/18154755-1-5-x-1-5-x-1-5-mini-blocks)

---

*Product available on Desertcart Finland*
*Store origin: FI*
*Last updated: 2026-02-13*