Rockwool

Made from spun basalt rock fibers that are then formed into slabs or cubes, rockwool is a popular growing substrate for hydroponic gardening. Rockwool, also known as stonewool, is perfect for seed starting, ebb and flow systems, and drip irrigation hydroponic systems due to its inert properties and the fact that it does not absorb water – leaving it available to the plants for growth and development.

HTG Supply offers rockwool in a variety of options, including cubes, blocks, slabs, whatever you need to get the most out of your hydroponic garden! Order today!

Already using rockwool a top-feed or drip system application? Check out the new Floraflex products for both hand-water or automated top-feed systems. We offer a great selection of Floracaps and other flex grow caps for rockwool blocks to help you streamline and optimize watering and feeding.

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Newest Rockwool

Most Popular in Rockwool

6x6x6 Grodan Gro-Block Improved Rockwool Block
6 Inch Rockwool Cubes - 6x6x6 Gro Blocks
$3.73
Cultilene Stonewool 1.5
Cultiwool Mini Rockwool Cubes - 1.5 Inch
$0.15
Rw Aok Plugs
Grodan A-Ok 1.5 Inch Starter Plugs Sheet of 98
$14.70
Rockwool Minicubes
Rockwool / Stonewool 1.5 Inch Cubes - 45 Pack
$9.46
Rockwool Groblocks
Rockwool / Stonewool 3 Inch Gro Blocks - 8 Pack
$6.09
CultileneStonewool 4X4X4
Cultiwool Cubes - 4 Inch
$1.22
Rockwool Groblocks
Rockwool / Stonewool 4 Inch Gro Blocks - 6 Pack
$10.12
Grodan A Ok Starter Plugs 1 Inch
Grodan A-Ok 1 Inch Starter Plugs Sheet of 200
$16.25
Rockwool Slab
Rockwool / Stonewool SLAB 6" x 36" x 4"
$11.37
Grodan Grow-Smart Tray
Grodan Grow-Smart Tray Insert
$13.58
Rockwool Macroplugs
Rockwool Stonewool Macro Plugs - 50 Pack
$12.16
Rockwool Mama
Rockwool / Stonewool 8 Inch Big Mama Block
$8.67
Rockwool Slab
Rockwool / Stonewool Slab 8" x 36" x 3"
$11.07
Rockwool Slab
Rockwool / Stonewool SLAB 6" x 36" x 3"
$8.53
Cultiwool Slab
Cultiwool Slab - 6 Inch
$7.95
Rockwool Cubes
Grodan Grow Cubes - 2 Cubic Feet
$45.86
Cultiwool Slab
Cultiwool Slab - 8 Inch
$9.75
Rockwool Cubes
Grodan Grow Cubes - 1 Cubic Foot
$28.46
Cultiwool 6X6X6
Cultiwool Cubes - 6 Inch
$3.13
4.5" Block Covers, 40pk
Sunleaves Block Covers 4.5
$11.82
6" Block Covers, 40pk
Sunleaves Block Covers 6.5
$20.39
Cultiwool-Seed-Tray
Cultiwool Stonewool Seed Tray
$15.55
Cultiwool 6x6x4
Cultiwool Blocks - 6 x 6 x 4 Inch
$2.40

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