Grodan Gro-Blocks

More products from: Grodan
Grodan Gro-Blocks

Grodan Gro-Blocks are cubes of stonewool (rockwool) that have a grooved base which promotes drainage to avoid root rot.

Grodan stonewool is pH neutral, making it easy for you to maintain the ideal hydroponics reservoir pH value of 5.5 - 6.5. Each gro-block is wrapped in white plastic on all sides for shape stability.

Grodan Delta Gro-Blocks have evenly distributed air pores that encourage your plants root growth throughout the entire block.

You can use Grodan Gro-Blocks for direct planting or "potting up" of plants started with Grodan Macroplugs or A-OK plugs.

Once your plants have outgrown the Grodan Gro-Blocks, simply expand the growing medium by "blocking" onto a Grodan Slab. No pots, no soil, no mess!

Not using hydroponics? Stonewool can be planted directly into soil, indoors or out.


3" x 3" x 2.5" Gro-Block - strip of 8 - pre-formed holes or NO holes
3" x 3" x 4" Gro-Block - strip of 8 with pre-formed holes
4" x 4" x 2.5" Gro-Block - strip of 6 with pre-formed holes
4" x 4" x 4" Gro-Block - strip of 6 with pre-formed holes
HUGO 6" x 6" x 6" Gro-Block - a single block with pre-formed hole

We advertise Grodan products at the MAP price per their demand.
Once you add any 4x4x4 Gro-blocks or 6x6x6 HUGO blocks to the shopping cart you will see a lower MSP price.

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