Pargro Stone Wool Propagation Blocks

Pargro Par6,5 Small 4" (4x4x2.6) blocks are lightweight stone wool made from basalt rock, engineered for uniform and consistent density. This rockwool media absorbs quickly, distributes water rapidly, and re-saturates evenly, simplifying WC (water content) management for predictable results. Pathogen-, disease-, and seed-free, each block promotes vigorous, even root growth throughout the entire substrate. The pre-drilled hole speeds transplanting and improves cutting stability for cleaner propagation workflows. Designed in popular Grodan sizes, Pargro gives you full control from cloning through early veg at a value price.

Hydroponic Rockwool Growing Media (4x4x2.6)

Use as starter blocks for cuttings or plugs, then transplant to slabs, bags, or larger blocks. Reliable performance in trays, flood-and-drain, or hand-watered systems makes it a favorite for commercial hydroponics and home grows alike.

Key  features:

• Uniform density = consistent EC/WC and predictable rooting.

• Fast wet-up and re-saturation for tighter irrigation control.

• Clean, pathogen-free stone wool supports healthy starts.

• Pre-drilled hole secures cuttings for strong, even development.

• Grodan-standard sizing streamlines propagation to transplant.