Begrow Stone Wool Cubes - 4 x 4 x 4-in - 180 Count

Rigid Cubes for Seedlings and Transplants - 4 x 4 x 4 in

Soft or collapsing media make seedlings harder to manage once they are wet. These cubes are made from corrugated, hydrophilic stone wool with high density, so they stay rigid and mechanically stable after watering. Vertical fibers and drainage channels in the lower layer let you grow seedlings under low moisture conditions.

This unit holds 180 cubes, which suits growers who start seedlings in regular batches for indoor or hydroponic systems. Hobbyists can use part of the count and keep the rest for later runs, while larger operations can use it as a starting quantity for repeat seedling cycles.

Key Features & Benefits

• Dense, corrugated stone wool — keeps its rigidity and stability after it gets wet.
• Hydrophilic material — takes up water readily, with full immersion in under 25 seconds.
• Vertical fiber structure with lower-layer drainage channels — supports seedling growth in low moisture conditions.
• Holes in the upper layer — accept germinated plugs for transplanting.
• 4 x 4 x 4-in cube — gives young roots room before the next stage.

Who Should Use Begrow Stone Wool Cubes

These cubes suit growers who start seedlings in hydroponic or other soilless setups and want a stable, easy-to-manage medium. They work for direct seeding and for moving plugs into larger cubes.

About Begrow Stone Wool Cubes

Begrow stone wool cubes are designed for seedling growth. They are made from corrugated, hydrophilic stone wool with an average fiber diameter of 6 µm and a vertical fiber structure. The recommended relative humidity range is 40 - 85%. Each cube measures 4 x 4 x 4 in.

Frequently Asked Questions

Q: Can I plant seeds directly in these cubes?
A: Yes. The cubes are designed for direct seed planting. You can also start seeds in separate stone wool plugs and transplant them later.

Q: How do I transplant germinated plugs into the cubes?
A: Germinate seeds in stone wool plugs first. Once the sprouts have grown, insert each plug into the special holes in the upper layer of a cube.

Q: What does hydrophilic mean?
A: Hydrophilic means the material attracts and absorbs water. These cubes reach full immersion in under 25 seconds, so they wet through quickly.

Q: Why choose stone wool over a loose medium?
A: Stone wool comes as a shaped block that keeps its form when wet. Loose media can shift or compact, while a dense cube holds its structure and is easy to handle and place.

Q: What humidity should I aim for?
A: The recommended relative humidity is 40 - 85%. Stay within that range while seedlings establish.

Q: How many cubes come in one unit?
A: One unit holds 180 cubes.