Rockwool (Hydro)

10 products

Rockwool is a precision growing medium commonly used in hydroponic systems and propagation. The Rockwool (Hydro) collection features sterile, inert media designed to deliver consistent moisture retention, excellent aeration, and reliable root support.

Made from spun mineral fibres, rockwool provides a stable structure that holds water evenly while allowing roots to access oxygen—making it ideal for seed starting, cuttings, and system-based growing. Its uniformity helps ensure predictable results when used with controlled watering and nutrient delivery.

Ideal for hydroponic setups, propagation trays, and system-based growing environments, Rockwool (Hydro) offers a dependable medium for growers who value consistency and control.

from $2.25

The Grodan Delta Gro Blocks (4x4x2.5") offer a superior growing medium made from high-quality stone wool (rockwool). Created from molten rock spun into fibers and compressed into various forms, Gro...

from $2.75

The Grodan Delta Gro Blocks (4x4x4") offer a premium growing medium crafted from high-quality stone wool (rockwool), designed to optimize plant growth at every stage. Made from molten rock spun int...

$8.95

Grodan Uni-Slab (9.5x8x4") is designed with advanced wetting technology, offering a wide control range for precise irrigation management. This improved stone wool slab ensures uniform water content...

$11.95

he Grodan Delta Big Mama Block (8x8x8") is an improved stone wool (rockwool) growing medium, designed to support optimal plant growth through all stages. Made from molten rock spun into fibers and ...