Grow Healthy Seedlings with Grodan Rockwool Propagation Cube

Enhance the development of your seeds and cuttings with Grodan Rockwool Propagation Cubes. Improve the germination process for small and large seeds and promote the growth of healthy, robust roots with these moisture-retaining cubes. Measuring 100mm x 100mm x 100mm, these Rockwool propagation cubes are designed to provide optimal air-to-water ratio, contributing to efficient growth all in one sustainable, indoor gardening solution.

Features and Benefits

  • Optimal air-to-water ratio: The Grodan Rockwool Cubes promote a healthy root system by maintaining an ideal balance of air and water, leading to thriving plants.
  • Moisture retention: The cubes keep your seeds and cuttings adequately hydrated, creating a more efficient germination and growth process.
  • Versatile design: With its dual-sided design, the cube accommodates both small seeds and large cuttings, making it suitable for various plant types.
  • Eco-friendly medium: Rockwool is a sustainable substrate material that provides an effective alternative to traditional soil methods.
  • Perfect cube size: Measuring 100mm x 100mm x 100mm, these Rockwool cubes are the ideal size for easy transplanting and handling, accommodating the needs of various plant species.

How to Use

  1. Soak the Grodan Rockwool Cube in water with a balanced pH of 5.5-6.0 for about 20 minutes to ensure adequate saturation. Drain excess water after soaking.
  2. Place your seed or cutting in the appropriate side of the prepared Rockwool cube. For small seeds, use the flat side, and for large seeds or cuttings, use the side with the small indent.
  3. Ensure that the seed or cutting is inserted deep enough into the Rockwool cube to provide support and maintain proper moisture levels.
  4. Place the prepared Rockwool cubes in a well-lit, temperature-controlled environment, ensuring that the cubes remain moist throughout the germination and growth process.
  5. Once your plant has developed a healthy root system, it's ready to be transplanted into your preferred final growing medium.

Aqua Gardening Suggests These are Best For

Grodan Rockwool Propagation Cubes are best for gardeners of all levels looking to propagate a variety of plant species in a controlled environment. They're ideal for hydroponic systems, indoor gardens, greenhouses or anyone wanting to improve the success rate of seed germination and cutting propagation.


What is the main purpose of the Grodan Rockwool Propagation Cube?

The primary use of the Grodan Rockwool Propagation Cube is to provide an optimal growing medium for seedlings and plant cuttings. It ensures great root development, moisture retention, and healthy plant growth.

Are Rockwool cubes suitable for all types of plants?

Yes, the Rockwool cubes are versatile and suitable for various plant types, including vegetables, herbs, and ornamental plants. They provide an excellent environment for root development and plant growth.

How do I use the Grodan Rockwool Propagation Cube with Hole for seeds and cuttings?

For seeds, place them on the flat side of the 100mm Rockwool cube and gently press down to ensure proper contact. For cuttings, insert the stem into the hole on the indented side and secure it in place. Moisten the cube as necessary to maintain appropriate moisture levels.

Do I need to prepare the Rockwool cube before planting?

It's advised to soak the Rockwool cube in pH-adjusted water (pH 5.5-6.0) for a few minutes before planting. This helps with moisture retention and promotes faster root development.

Can I transplant the entire Rockwool cube into soil or another growing medium?

Yes, the Rockwool cube can be easily transplanted into soil or another growing medium without disturbing the roots. This approach minimises shock during transplantation and helps maintain a healthy growth process.

How do I maintain the Rockwool cube for optimal growth outcomes?

To maintain the Rockwool cube, ensure it remains moist but not waterlogged. Monitor the moisture level by gently squeezing the cube and adjusting water input accordingly. Keep the temperature and humidity within the ideal range for your plant species.

Is Rockwool eco-friendly and safe for plants?

Rockwool is made from natural volcanic rock, which undergoes a heating and spinning process to create fibres. It is an eco-friendly and safe product for plants. However, it is non-biodegradable, so it should be reused or recycled where possible.

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