Grodan Rockwool 77 Cube Tray for Seeds and Cuttings

Grow healthy seedlings and develop thriving cuttings with Grodan Rockwool 77 Cube Tray. This high-quality, high-density rockwool tray provides excellent drainage, ensuring optimal growth for your plants, and can easily be cut to size for customisation.

Features and Benefits

  • Tray of 77 Rockwool Cubes: Offers ample space for growing multiple seedlings and cuttings
  • Customisable: Tray can be cut to size with scissors for personalised gardening needs
  • Excellent drainage: Prevents overwatering and ensures healthy root development
  • Indented cubes: Each cube features a small indent for cuttings and seeds to sit securely
  • High-density rockwool: Provides better insulation, oxygen retention, and wicking for optimal plant growth

How to Use

  1. Decide on the required size of the tray and cut it using scissors if necessary.
  2. Place seeds or cuttings in the small indent in each cube, ensuring they are secure and stable.
  3. Water and monitor the cubes according to the specific needs of the seeds or cuttings in use.
  4. Once roots start to emerge through the cubes, transplant them into larger Grodan Transplanting Cubes or other suitable growing media such as Expanded Clay pebbles, Coco or Potting Soil.

Aqua Gardening Suggests These are Best For

Grodan Rockwool 77 Cube Tray is best suited for gardeners, hydroponic enthusiasts, and horticulturists looking for an easy and effective method for raising seedlings and propagating cuttings. Ideal for both beginners and experts, this high-quality rockwool tray will ensure healthy growth and development in a variety of plants.

Using the 77 cube Rockwool tray

To prepare an entire tray of Rockwool cubes, prepare 3-4L of solution with Bloom Roots and pH down in a larger tray, and put the Rockwool tray into the solution. Leave it to soak one hour in the solution, then remove and drain for 5 min, then placing seeds inside each Rockwool cube. The tray should then be placed inside a propagation unit and sprayed with the Bloom Roots or another root accelerator as the Rockwool cubes dry out. Click here to read our handy guide on hydroponics-or-aquaponics/">raising seeds with rockwool.


What are Grodan Rockwool cubes used for?

Grodan Rockwool cubes are ideal for raising seedlings and cuttings in hydroponic systems. They provide an optimal environment for root development, leading to unrivaled growth and production.

How many Rockwool cubes are included in the tray?

The tray contains 77 Rockwool cubes.

Can I adjust the size of the tray?

Yes, the tray can be easily cut to size with scissors to fit your specific needs.

How do I know when to transplant the plants from the Rockwool cubes?

Once you notice roots starting to emerge through the cubes, it's time to transplant them into larger Grodan Transplanting Cubes or another media such as Expanded Clay pebbles, Coco, or Potting Soil.

What sets Grodan Rockwool apart from other rockwool brands?

Grodan Rockwool has the highest density on the market, which translates into greater structural integrity, increased oxygen holding capabilities, better insulation value, and improved wicking and dispersion of moisture and nutrients. These factors contribute to better root development and overall plant growth.

Does each Rockwool cube have a designated space for seeds or cuttings?

Yes, each cube has a small indent that is specifically designed for seeds and cuttings. This ensures proper placement and optimal growing conditions.

Is Grodan Rockwool sterile and safe for my plants?

Yes, Grodan Rockwool is made from pathogen-free materials that ensure a safe environment for your plants to grow and thrive.

Why is drainage important for Rockwool cubes?

Proper drainage is crucial for maintaining optimal moisture and nutrient levels in the growing medium, preventing root rot, and promoting healthy root development. The Grodan Rockwool 77 Cube Tray provides good drainage for optimal plant growth.

Still Unsure if This Product is Right for You?

  • Submit a question via the Reviews & Questions tab on this page, and our team will respond to you
  • Login to check your Aqua Gardening Member Price
  • Book a free Consult with the Aqua Gardening team here
  • Still Overwhelmed? Start your Gardening Journey with a free eBook here

(SKU: 125763)

Shipping Calculator

Enter the quantity of product and your Australian suburb name to calculate the shipping costs for multiples of this item only. You can calculate the shipping costs for your entire order, including international orders, on the Cart Page.

Free Shipping Eligibility

Aqua Gardening offers free shipping on most orders above $249 that are not bulky items.  Once you place all the items you wish to buy in the cart, the combined shipping price will be shown in the cart, including Free Shipping if you are eligible. For full details please see our free shipping eligibility here.

Delivery Information

Back Order products

These are products we usually carry in stock but are temporary out of stock. These products will be back in stock within a few days. We can send you an email notification when they are back in stock if you click on the “Notify me when back in stock” link. See the full details here.

Click & Collect Only products

These products can only be collected from our Brisbane showroom as we can not ship them. If you place any of these products in your cart, you will only see the Click & Collect option at the checkout.

Fast Dispatch products

These are products that we have in stock in our Brisbane showroom, and they are available for immediate Click & Collect or Shipping. Keep in mind that if you have a product which is not listed as a Fast Dispatch product in your cart, there might be a delay on your order. See the full details here.

Special Order products

Special Order products are products that we do not regularly stock. These products will be ordered specially for you, or dispatched directly to you from our supplier. See the full details here.

Ship-To-Store products

Products marked with ship-to-store can still be shipped to us to collect in-store! Simply check out with the shipping address: 3/4 Billabong Street, Stafford, QLD, 4053. Once your order arrives, we’ll email you to let you know that it is ready to collect.


Limited Warranty - This product has been stored in a controlled environment to ensure you will receive the best quality product possible. Due to this reason this product is sold on a strict no refund or return policy, unless it falls under a warranty claim.


60 Day Returns - Not available for this product, please contact us if you have any issues. More details...