50-Piece Rock Wool Seed Starter Cubes – Hydroponic Growing & Propagation Plugs

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Give seeds and cuttings a dedicated place to get started with these 50-Piece Rock Wool Seed Starter Cubes. 🌱💧

Designed for seed starting, hydroponic growing and plant propagation, each cube provides a porous growing medium capable of holding moisture while allowing air around developing roots.

Each individual cube measures approximately 2.5 × 2.5 × 3cm and features a convenient pre-formed planting hole, making it easy to position seeds or suitable cuttings.

With 50 individual cubes included, they're a practical addition to home hydroponic systems, propagation setups, greenhouses and indoor growing projects.

✨ Why You'll Love Them

• 50 individual growing cubes
• Suitable for seed starting
• Great for plant propagation
• Suitable for hydroponic growing systems
• Pre-formed planting holes
• Approx. 2.5 × 2.5 × 3cm per cube
• Holds moisture around developing roots
• Porous structure allows airflow
• Easy to separate into individual cubes
• Great for starting multiple plants at once
• Compact & easy to incorporate into growing setups

🌱 Start Seeds with Less Mess

Each cube has a small planting hole in the top, providing a convenient position for your seed.

Rather than filling individual cells with loose growing media, simply prepare the rock wool appropriately, place your seed into the opening and maintain the moisture conditions required by the particular plant you're growing.

✂️ Great for Propagating Cuttings

The cubes can also be used when propagating suitable plant cuttings.

Their compact size makes them particularly useful when you want to start multiple cuttings while keeping each plant in its own individual growing medium.

Propagation requirements vary significantly between plant species, so always follow appropriate instructions for the plant you're growing.

💧 Ideal for Hydroponic Growing

Rock wool is commonly used as a soilless growing medium, making these cubes particularly useful for hydroponic setups.

Its fibrous structure can retain moisture while leaving spaces for air, helping you maintain a controlled environment around developing roots.

Once seedlings become established, the complete cube can generally be transferred into a compatible larger growing setup without needing to remove the young plant from the material.

📏 Individual Cube Size

Based on the measurements shown:

Full 50-Cube Sheet

Approximately:

28.5 × 15 × 3cm

The cubes can be separated individually as required.

🌿 Suitable for a Range of Plants

Use the cubes for starting suitable:

• Vegetables
• Herbs
• Flowers
• Leafy greens
• Indoor plants
• Hydroponic plants
• Seeds
• Plant cuttings

Germination and propagation success will vary depending on the plant variety, environmental conditions and growing method.

🧪 Preparing Rock Wool Before Planting

Rock wool requires a little more preparation than simply dropping in a seed.

For best results:

1. Wear gloves when handling dry rock wool.
2. Prepare the cubes according to the requirements of your hydroponic or propagation system.
3. Rock wool can naturally have a relatively high pH, so hydroponic growers commonly condition/soak it using appropriately pH-adjusted water before planting.
4. Allow excess water to drain naturally – don't aggressively squeeze or compress the cubes, as this can affect their structure.
5. Place your seed or cutting into the pre-formed hole.
6. Maintain appropriate moisture, light and growing conditions for your chosen plant.

Avoid keeping the cubes completely waterlogged – roots need access to both moisture and oxygen.

🌱 Perfect for Your Seed-Starting Range

These are an especially good match with the gardening products you've just been adding.

• Rock Wool Starter Cubes
• Seedling Trays
• Soil Sifters
• Garden Hand Tools
• Nursery Pots
• Plant Labels
• Watering Accessories

📏 Product Specifications

• Product Type: Seed Starting / Propagation Cubes
• Material: Rock Wool / Mineral Wool
• Quantity: 50 Cubes
• Individual Cube Size: Approx. 2.5 × 2.5 × 3cm
• Full Sheet Size: Approx. 28.5 × 15 × 3cm
• Planting Hole: Yes
• Growing Method: Soilless / Hydroponic
• Suitable For: Seeds & Compatible Plant Cuttings
• Application: Seed Starting, Propagation & Hydroponic Growing

📦 Package Includes

• 50 × Rock Wool Seed Starter Cubes

Seeds, plants, trays, nutrients, hydroponic equipment and other gardening accessories are not included.

⚠️ Important Handling Information

• Wear gloves when handling, cutting or separating dry rock wool.
• Avoid unnecessary handling that may release loose fibres or dust.
• Avoid breathing dust or loose fibres.
• Work in a well-ventilated area.
• Avoid contact with eyes.
• Wash hands and exposed skin after handling.
• Keep away from children and pets.
• Do not ingest.
• Do not use as a children's craft or play material.
• Follow the preparation requirements of your particular hydroponic system and plant variety.
• Germination, rooting and plant growth cannot be guaranteed and depend on numerous growing conditions.
• Individual cube measurements may vary slightly due to manufacturing tolerances.

💛 A Smarter Way to Shop

By sourcing directly from trusted manufacturers, we're able to offer practical gardening and growing essentials without the traditional retail mark-up.

Some products may arrive in simple or minimal packaging. This helps keep prices affordable while reducing unnecessary packaging waste – without compromising on the quality or functionality of the product inside.