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Products > Growing Media > Grodan Rockwool Cases

Rockwool is made from molten rock spun into fibers like cotton candy. It's then pressed into different shapes and cut into cubes and slabs. The cubes and slabs feel like a sponge and will not breakdown. The small Multiblocks and Miniblocks can be used for starting cuttings or seeds. After the plants grow out of the small blocks, you can place them in the holes in the larger growing locks. From there you can place them on a slab for larger plants. Although the rockwool can be heat sterilized after use and re bagged, most hobby growers just throw them away after use. The Grodan Growcubes are small squares of rockwool about the size of a sugar cube. They are used for filling pots or mixing with Hydroton for added moisture. The Granulated rockwool is also for filling pots and is less expensive than the Growcubes but does not have the same aeration.


Growing Blocks are used for small plants in a flood / drain tray

Multiblocks are used for seedlings and cuttings

Miniblocks for seedlings and cuttings

Granulated for filling pots

Hugo Blocks for larger plants, best with a drip system

Slabs for large plants watered by drip irrigation.

Growcubes in a pot

Just need a few strips of Rockwool?

Learn More About Rockwool.

Description (click product description for details) Price

4 Inch Rockwool Block Plastic Cover - 40 Pack

Availability: Usually ships in 24 hours

Item Number: 111005

4 Inch Rockwool Block Plastic Cover - 40 Pack
$5.95

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6 Inch Rockwool Block Plastic Cover - 40 Pack

Availability: Usually ships in 24 hours

Item Number: 111006

6 Inch Rockwool Block Plastic Cover - 40 Pack
$11.95

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Grodan Multiblocks AO 25/40 1"x1"x1.5", 200 Per Sheet, Case of 6000

Availability: Usually ships in 3 to 5 days.

Item Number: 131558

Grodan Multiblocks AO 25/40 1"x1"x1.5", 200 Per Sheet, Case of 6000
$257.95

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Grodan Multiblocks AO 36/40 1.4"x1.4"x1.5", 98 Per Sheet, Case of 2940

Availability: Usually ships in 24 hours

Item Number: 111002

Grodan Multiblocks AO 36/40 1.4"x1.4"x1.5", 98 Per Sheet, Case of 2940
$233.95

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Grodan Multiblocks AO 50/40 2"x2"x1.5", 50 Per Sheet, Case of 1500

Availability: Usually ships in 3 to 5 days.

Item Number: 131560

Grodan Multiblocks AO 50/40 2"x2"x1.5", 50 Per Sheet, Case of 1500
$202.95

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Grodan Miniblocks Delta 40/40 1.5"x1.5"x1.5", 15 Per Strip, Case of 2250

Availability: Usually ships in 24 hours

Item Number: 111009

Grodan Miniblocks Delta 40/40 1.5"x1.5"x1.5", 15 Per Strip, Case of 2250
$266.95

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Grodan Miniblocks Delta 50/40, 2"x2"x1.5", 12 Per Strip, Case of 1440

Availability: Usually ships in 3 to 5 days.

Item Number: 111011

Grodan Miniblocks Delta 50/40, 2"x2"x1.5", 12 Per Strip, Case of 1440
$238.95

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Grodan Delta 4 Gro-Blocks 3x3x2.5 With Hole Case of 384

Availability: Usually ships in 24 hours

Item Number: 111014

Grodan Delta 4 Gro-Blocks 3x3x2.5 With Hole Case of 384
$166.95

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Grodan Delta 4 Gro-Blocks 3x3x2.5 No hole Case of 384

Availability: Usually ships in 3 to 5 days.

Item Number: 111013

Grodan Delta 4 Gro-Blocks 3x3x2.5 No hole Case of 384
$166.95

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Grodan Delta 5.6 Gro-Blocks 3x3x4 With Hole Case of 256

Availability: Usually ships in 24 hours

Item Number: 111017

Grodan Delta 5.6 Gro-Blocks 3x3x4 With Hole Case of 256
$166.95

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Grodan Delta 6.5 Gro-Blocks 4x4x2.5 With Hole Case of 216

Availability: Usually ships in 3 to 5 days.

Item Number: 111019

Grodan Delta 6.5 Gro-Blocks 4x4x2.5 With Hole Case of 216
$138.95

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Grodan Delta 8 Gro-Blocks 4x4x3 No Hole Case of 180

Availability: Usually ships in 24 hours

Item Number: 111021

Grodan Delta 8 Gro-Blocks 4x4x3 No Hole Case of 180
$153.95

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Grodan Delta 8 Gro-Blocks 4x4x3 With Hole Case of 180

Availability: Usually ships in 24 hours

Item Number: 111023

Grodan Delta 8 Gro-Blocks 4x4x3 With Hole Case of 180
$153.95

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Grodan Delta 10 Gro-Blocks 4x4x4 With Hole Case of 144

Availability: Usually ships in 24 hours

Item Number: 111022

Grodan Delta 10 Gro-Blocks 4x4x4 With Hole Case of 144
$148.95

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Grodan Hugo Gro-Blocks 6x6x5.5 Case of 48

Availability: Usually ships in 24 hours

Item Number: 111015

Grodan Hugo Gro-Blocks 6x6x5.5 Case of 48
$123.95

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Grodan Expert 15/75 6"x3"x36" Slab Case of 12

Availability: Usually ships in 24 hours

Item Number: 111025

Grodan Expert 15/75 6"x3"x36" Slab Case of 12
$76.95

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Grodan Expert 15/100 6"x4"x36" Slab Case of 9

Availability: Usually ships in 3 to 5 days.

Item Number: 131556

Grodan Expert 15/100 6"x4"x36" Slab Case of 9
$76.95

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Grodan Expert 20/75 8"x3"x36" Slab Case of 12

Availability: Usually ships in 24 hours

Item Number: 111027

Grodan Expert 20/75 8"x3"x36" Slab Case of 12
$90.95

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Grodan Classic 30/75 12"x3x36" Slab Case of 8

Availability: Usually ships in 24 hours

Item Number: 111029

Grodan Classic 30/75 12"x3x36" Slab Case of 8
$89.95

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Macro Plugs, Bag of 32

Availability: Usually ships in 24 hours

Item Number: 111001

Macro Plugs, Bag of 32
$5.95

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Growcubes 2 Cubic Foot bag

Availability: Usually ships in 24 hours

Item Number: 111051

Growcubes 2 Cubic Foot bag
$34.95

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AgroDynamics Water Absorbent Granulates 45 lbs.

Availability: Usually ships in 24 hours

Item Number: 111036

AgroDynamics Water Absorbent Granulates 45 lbs.
$73.95

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AgroDynamics Water Repellent Granulates 45 lbs.

Availability: Usually ships in 3 to 5 days.

Item Number: 111037

AgroDynamics Water Repellent Granulates 45 lbs.
$87.95

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Growcubes 2 Cubic Foot bag Case of 3 bags

Availability: Usually ships in 24 hours

Item Number: 111052

Growcubes 2 Cubic Foot bag Case of 3 bags
$99.95

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Growcubes 1 Cubic Foot bag Case of 6 bags

Availability: Usually ships in 3 to 5 days.

Item Number: 111053

Growcubes 1 Cubic Foot bag Case of 6 bags
$113.95

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Macro Plugs, Bag of 32, case of 50 bags, 1600 Plugs

Availability: Usually ships in 24 hours

Item Number: 111004

Macro Plugs, Bag of 32, case of 50 bags, 1600 Plugs
$244.95

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AgroWool

Availability: Usually ships in 3 to 5 days.

Item Number: 134160

AgroWool
$39.95

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Grodan Granulate, Medium Absorbant, 45 Pounds

Availability: Usually ships in 3 to 5 days.

Item Number: 134161

Grodan Granulate, Medium Absorbant, 45 Pounds
$59.95

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Grodan Mini Cubes Bulk 22 Pounds, 5.3 Cubic Feet

Availability: Usually ships in 3 to 5 days.

Item Number: 134182

Grodan Mini Cubes Bulk 22 Pounds, 5.3 Cubic Feet
$95.27

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