Pargro by Grodan Rockwool Slab - 36 x 6 x 3-in - No Holes - Bagged

Structured Root-Zone Support for Hydroponic Systems - 36 in Long

Uneven water distribution leads to uneven root development. This rockwool slab gives your plants a structured hydroponic growing medium that supports uniform water distribution and healthy root development. It suits efficient irrigation and nutrient management across a range of hydroponic systems.

At 36 x 6 x 3 in, this slab covers a full row position and suits growers who want a consistent, easy-to-place medium. It works for small setups and for larger growing environments. It has no holes, so you decide where plants and irrigation go.

Key Features & Benefits

• Structured rockwool medium — gives roots a consistent structure to develop in.
• Uniform water distribution — supports even moisture across the slab.
• No holes — lets you place plants and irrigation to suit your layout.
• 36 x 6 x 3 in size — gives a predictable footprint for planning rows.
• Bagged — comes packaged for handling and storage.

Who Should Use Pargro by Grodan Rockwool Slab

Growers running hydroponic systems who want a structured medium for flowering or vegetative growth will find it useful. It suits both hobby setups and larger cultivation spaces.

About Pargro Rockwool Slab

Pargro by Grodan Rockwool Slab is a rockwool growing medium measuring 36 in long, 6 in wide and 3 in high. It has no holes and is supplied bagged.

Frequently Asked Questions

Q: What size is this slab?
A: It measures 36 in long, 6 in wide and 3 in high. That makes it a full-length slab for row-style hydroponic layouts.

Q: Does it come with holes?
A: No, this version has no holes. You can set plant and irrigation positions yourself.

Q: Is it suitable for small and large grows?
A: Yes. It suits small and large-scale growing environments and works across a range of hydroponic systems.

Q: What does uniform water distribution mean?
A: It means moisture spreads evenly through the medium rather than pooling in one area. Even moisture supports more consistent root development.

Q: How is it packaged?
A: The slab is bagged for handling and storage. This listing is for one slab, sold each.