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Grodan Stonewool Delta Gro-Blocks 

Grodan Stonewool Delta Gro-Blocks

Delta 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 to maintain the ideal gardening pH value of 5.5 - 6.5. Each block is wrapped in white plastic on all sides for individual use. 

They can be used for direct planting or "potting up" of plants started with Grodan Macroplugs or A-OK plugs. When your seedlings have a couple of small leaves and the roots emerge from your Macroplugs or A-OK plugs, soak the the Gro-Block in pH5.5 water overnight and insert the starter plugs in the holes the next day. Hold off watering for 1 to 2 days to prompt the roots to expand quickly into the Delta Gro-Block.

Once your plants have outgrown the 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.

Delta Gro-Blocks provide more evenly distributed pores and a robust design, giving your plants the optimum zone for root growth throughout the entire block. Stonewool is recognized the world over as the ideal hydroponics growing substrate.

Dimensions:

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

More info from the Manufacturer (PDF format - Lots of detail.)

8 Grodan Gro-Blocks - 3 x 3 x 2.5

$4.88

384 Grodan Gro-Blocks - 3 x 3 x 2.5

$212.97

8 Grodan Gro-Blocks - 3 x 3 x 2.5 - NO HOLE

$4.88

384 Grodan Gro-Blocks - 3 x 3 x 2.5 - NO HOLE

$212.96

8 Grodan Gro-Blocks - 3 x 3 x 4

$6.95

256 Grodan Gro-Blocks - 3 x 3 x 4

$212.92

6 Grodan Gro-Blocks - 4 x 4 x 2.5

$5.07

216 Grodan Gro-Blocks - 4 x 4 x 2.5

$165.76

6 Grodan Gro-Blocks - 4 x 4 x 4

$8.34

144 Grodan Gro-Blocks - 4 x 4 x 4

$181.92

Hugo Grodan Gro-Block - 6 x 6 x 6

$3.21

48 Hugo Grodan Gro-Blocks - 6 x 6 x 6

$140.01

 

 
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Question? ASK ME!

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Growco Indoor Garden Supply
1042 Michigan NE  ·  Grand Rapids, Michigan USA  49503-1908
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