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.
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Grodan Uni Slab 9.5"x8"x4" - Case of 16
The UNI-SLAB combines all the benefits of our traditional slabs with the versatility of a block. Great stability for any size plant. The UNI-SLAB is completely wrapped thus keeping all the roots of your plant safely contained within the slab, protected fr... More Details
Item Number: 134812
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Usually ships in 3 to 5 days. |
$59.00
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Usually ships in 3 to 5 days. |
$279.31
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Usually ships in 24 hours |
$253.02
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Usually ships in 24 hours |
$220.16
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Usually ships in 3 to 5 days. |
$289.25
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Usually ships in 3 to 5 days. |
$259.00
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Grodan Delta 4 Gro-Blocks 3x3x2.5 With Hole Case of 384
3 x 3 x 3 inch Growing Blocks with holes for smaller cubes. Used as a second stage from smaller cubes. The 1-1/2 inch round hole will accept the small cubes that come in a sheet or the wrapped cubes that come in a strip. Growing blocks are great for ebb a... More Details
Item Number: 111014
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Usually ships in 24 hours |
$174.81
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Grodan Delta 4 Gro-Blocks 3x3x2.5 No hole Case of 384
3 x 3 x 3 inch Growing Blocks. Used as a second stage from smaller cubes. Growing blocks are great for ebb and flow hydroponic systems or for use as mid stage for plants eventually going on to Rockwool slabs. The blocks are individually wrapped in plastic... More Details
Item Number: 111013
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Usually ships in 3 to 5 days. |
$174.85
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Grodan Delta 5.6 Gro-Blocks 3x3x4 With Hole Case of 256
3 x 3 x 4 inch Growing Blocks with holes for smaller cubes. Used as a second stage from smaller cubes. The 1-1/2 inch round hole will accept the small cubes that come in a sheet or the wrapped cubes that come in a strip. Growing blocks are great for ebb a... More Details
Item Number: 111017
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Usually ships in 24 hours |
$174.83
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Grodan Delta 6.5 Gro-Blocks 4x4x2.5 With Hole Case of 216
4 x 4 x 2.5 inch Growing Blocks with holes for smaller cubes. Used as a second stage from smaller cubes. The 1-1/2 inch round hole will accept the small cubes that come in a sheet or the wrapped cubes that come in a strip. Growing blocks are great for ebb... More Details
Item Number: 111019
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Usually ships in 3 to 5 days. |
$136.10
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Grodan Delta 8 Gro-Blocks 4x4x3 No Hole Case of 180
4 x 4 x 3 inch Growing Blocks without holes. Used as a second stage from smaller cubes, just place the small cube on top. Growing blocks are great for ebb and flow hydroponic systems or for use as mid stage for plants eventually going on to Rockwool slabs... More Details
Item Number: 111021
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Usually ships in 3 to 5 days. |
$157.21
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Grodan Delta 8 Gro-Blocks 4x4x3 With Hole Case of 180
4 x 4 x 3 inch Growing Blocks with holes for smaller cubes. Used as a second stage from smaller cubes. The 1-1/2 inch round hole will accept the small cubes that come in a sheet or the wrapped cubes that come in a strip. Growing blocks are great for ebb a... More Details
Item Number: 111023
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Usually ships in 3 to 5 days. |
$157.15
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Grodan Delta 10 Gro-Blocks 4x4x4 With Hole Case of 144
This is the most popular size rockwool cube. 4 x 4 x 4 inch Growing Blocks with holes for smaller cubes. Used as a second stage from smaller cubes. The 1-1/2 inch hole will accept the small cubes that come in a sheet or the wrapped cubes that come in a st... More Details
Item Number: 111022
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Usually ships in 24 hours |
$147.21
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Grodan Hugo Gro-Blocks 6x6x5.5 Case of 48
The largest rockwool block. 6 x 6 x 6 inch Growing blocks with 1-1/2 inch hole for smaller cubes. Used for growing real big plants. These cubes work best with a drip system. In a flood system the top half can dry out quickly and lead to salt buildup so ri... More Details
Item Number: 111015
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Usually ships in 24 hours |
$114.11
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Grodan Big Mama 8x8x8 Inch, Case of 18
BIG MAMA is the largest block ever produced by Grodan. It is 8" square and contains over twice the amount of wool as the popular Hugo block. This block is big enough to grow a large plant for its entire life! When your plant outgrows its current block, ju... More Details
Item Number: 134815
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Usually ships in 3 to 5 days. |
$95.08
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Grodan Expert 15/75 6"x3"x36" Slab Case of 12
6 x 3 x 36 inch rockwool slab. Growing Slabs are a great choice for vegetable crops or almost any plant that needs extra support at the base. Slabs come wrapped in U.V. resistant plastic that makes a good container for the roots to thrive. A 3 foot slab c... More Details
Item Number: 111025
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Usually ships in 3 to 5 days. |
$60.84
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Grodan Expert 15/75 6"x3"x40" Slab Case of 12
Grodan Stonewool (rockwool) is made from molten rock spun into cotton candy-like fibers and then compressed into cubes, blocks, or slabs. Where other rockwool brand manufacturers cut all sizes from one batch of wool, Grodan is unique by making different t... More Details
Item Number: 134566
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1-2 Week Lead Time |
$67.13
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Grodan Expert 15/100 6"x4"x36" Slab Case of 9
6 x 4 x 36 inch rockwool slab. Growing Slabs are a great choice for vegetable crops or almost any plant that needs extra support at the base. Slabs come wrapped in U.V. resistant plastic that makes a good container for the roots to thrive. A 3 foot slab c... More Details
Item Number: 131556
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Usually ships in 3 to 5 days. |
$60.83
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Grodan Expert 20/75 8"x3"x36" Slab Case of 12
8 x 3 x 36 inch rockwool slab, most popular size. Growing Slabs are a great choice for vegetable crops or almost any plant that needs extra support at the base. Slabs come wrapped in U.V. resistant plastic that makes a good container for the roots to thri... More Details
Item Number: 111027
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Usually ships in 24 hours |
$78.99
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Grodan Classic 30/75 12"x3x36" Slab Case of 8
12 x 3 x 36 inch rockwool slab. Growing Slabs are a great choice for vegetable crops or almost any plant that needs extra support at the base. Slabs come wrapped in U.V. resistant plastic that makes a good container for the roots to thrive. A 3 foot slab ... More Details
Item Number: 111029
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Usually ships in 24 hours |
$79.39
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Usually ships in 24 hours |
$5.45
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Usually ships in 24 hours |
$10.95
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Macro Plugs, Bag of 32
The Clone Plugs fit in the round holds in the 3 and 4 inch growing blocks. They are slit so you can open them up and place your cutting inside. This will keep the cloning gel in place and help with rooting.
Learn About Rockwool
... More Details
Item Number: 111001
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Usually ships in 24 hours |
$5.04
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Growcubes 2 Cubic Foot bag
Growcubes are an ideal hydroponic substrate for growing many crops. Ideally suited for top irrigation (watering can or drip system), the product also performs well under ebb & flow applications. Easy to use and environmentally friendly, growcubes provide ... More Details
Item Number: 111051
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Usually ships in 3 to 5 days. |
$31.73
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Grodan Growcubes 5.3 Cubic Feet
Grodan Mini Cubes -The product consists of small stonewool croutons about the size of a sugar cube. When you use this potting mix the miniature cubes stack on top of each other and air pockets are created throughout the pot. Growcubes are difficult to ove... More Details
Item Number: 134182
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Usually ships in 3 to 5 days. |
$67.51
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Grodan Growcubes 2 Cubic Foot bag Case of 3 bags
Grodan Mini Cubes -The product consists of small stonewool croutons about the size of a sugar cube. When you use this potting mix the miniature cubes stack on top of each other and air pockets are created throughout the pot. Growcubes are difficult to ove... More Details
Item Number: 111052
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Usually ships in 3 to 5 days. |
$83.29
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Grodan Growcubes 1 Cubic Foot bag Case of 6 bags
Grodan Mini Cubes -The product consists of small stonewool croutons about the size of a sugar cube. When you use this potting mix the miniature cubes stack on top of each other and air pockets are created throughout the pot. Growcubes are difficult to ove... More Details
Item Number: 111053
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Usually ships in 3 to 5 days. |
$102.86
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Grodan Grow Chunks, 2 Cubic Foot Bag, Case of 3 Bags
Super light and Super versatile. 2 cubic foot bag.Grow Chunks are a larger version (3/4" square) of the popular Grow Cubes. They are great for direct planting or for use as a filling around blocks in containers. They can be easily mixed with other media f... More Details
Item Number: 134814
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Usually ships in 3 to 5 days. |
$83.29
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1-2 Week Lead Time |
$220.76
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Grodan Macro Plugs, Case of 2000
These rockwool plugs feature a slit for easy insertion of rooted cuttings. They fit perfectly into the hole of any standard rockwool block or any other type of growing medium.
... More Details
Item Number: 131557
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1-2 Week Lead Time |
$234.34
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Usually ships in 3 to 5 days. |
$66.97
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Usually ships in 3 to 5 days. |
$73.02
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