Begrow Stone Wool Slabs - 10 x 8 x 4-in - 36 Count

Rigid Root-Zone Medium for Hydroponic Beds - 36 Slabs per Unit

Roots need a medium that drains well, holds its shape and rewets quickly. These stone wool slabs are made from randomly arranged fibers that form a rigid structure with high porosity. The manufacturer lists porosity above 95% and full immersion in water in under 25 seconds.

At 10 x 8 x 4 in with 36 slabs in the unit, this is a quantity suited to regular indoor growers running several stations and to small commercial greenhouse beds. Hobbyists can split the count across multiple trial runs or shared setups.

Key Features & Benefits

• High porosity — open structure leaves room for air and water around roots.
• Fast wetting — full immersion in water takes under 25 seconds, so slabs saturate quickly.
• Rigid, resilient structure — recovery level is listed above 98% at 6 kPa.
• Consistent size — 10 x 8 x 4 in slabs make bed layouts easy to plan.
• Density of 70-80 kg/m³ — a stable medium for vegetative growth and flowering.

Who Should Use Begrow Stone Wool Slabs

Growers running hydroponic systems in greenhouses or indoor rooms who want an inert, structured medium for root development. It suits both home gardeners and licensed commercial operations.

About Begrow Stone Wool Slabs

Begrow stone wool slabs are made from fibers with an average diameter of 6 µm and a chaotic fiber structure. Organic matter is listed at 1-4%, and the recommended relative humidity is 40-85%. Each unit contains 36 slabs.

Frequently Asked Questions

Q: What size are these slabs?
A: Each slab measures 10 x 8 x 4 in. A unit contains 36 slabs.

Q: How quickly do they absorb water?
A: The manufacturer lists full immersion in water in under 25 seconds. That makes initial saturation fast.

Q: What does porosity mean for roots?
A: Porosity is the share of the medium that is open space. A high figure, listed here above 95%, leaves room for both air and water around roots.

Q: Are these suited to hydroponic systems?
A: Yes. The slabs are designed as a root-zone medium for hydroponic conditions in greenhouses and similar setups.

Q: How does stone wool compare with loose media?
A: Stone wool is a formed, rigid block, so it keeps a consistent shape and layout. Loose media can settle or shift over time.