BeGrow Stone Wool Cubes - 6 x 6 x 6-in - 48 Count

Stable Root Zone for Seedlings - 6 in Cubes

Soft growing blocks can slump once they are wet, which stresses young roots and makes watering harder to manage. These cubes are made from corrugated, hydrophilic stone wool with high density, so they keep their rigidity and mechanical stability after wetting. Vertical fibers and drainage channels in the lower layer let you raise seedlings under low moisture conditions.

This listing is one unit holding 48 cubes, each 6 x 6 x 6 in. That suits growers who start seedlings in batches in hydroponic systems or indoor setups and want a larger block than a small starter plug.

Key Features & Benefits

• Corrugated, hydrophilic stone wool — wets readily and holds its structure.
• Vertical fiber structure — supports root growth and drainage.
• Drainage channels in the lower layer — help you keep moisture low.
• Holes in the upper layer — accept plugs with sprouts already growing.
• Full immersion in under 25 seconds — saturates quickly before use.

Who Should Use BeGrow Stone Wool Cubes

Home gardeners and commercial growers who start seedlings in stone wool and want a consistent block for direct seeding or for transplanting germinated plugs.

About BeGrow Stone Wool Cubes

These cubes are stone wool grow media designed for seedling growth. Average fiber diameter is 6 µm, and the recommended relative humidity is 40-85%. Each cube measures 6 x 6 x 6 in, and one unit contains 48 cubes.

Frequently Asked Questions

Q: Can I plant seeds directly in these cubes?
A: Yes. The cubes work for direct seed planting. You can also transplant seedlings into them from plugs.

Q: How do I transplant plugs into the cubes?
A: Germinate seeds in stone wool plugs first. Then insert the plugs with sprouts into the holes in the upper layer of the cubes.

Q: What does hydrophilic mean?
A: Hydrophilic means the material attracts and takes up water. These cubes fully immerse in under 25 seconds.

Q: Why does fiber direction matter?
A: Vertical fibers, together with the lower drainage channels, let seedlings grow in low moisture conditions. They also give roots a consistent path through the block.

Q: What humidity range is recommended?
A: The recommended relative humidity is 40-85%. Keep your growing space within that range.

Q: How many cubes are in one unit?
A: One unit contains 48 cubes. Each cube measures 6 x 6 x 6 in.