Grodan Uni-Slab, Case of 16

Last price we saw

$66.79at HTG Supply, last seen Nov 7

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Our take on the Grodan Uni-Slab, Case of 16

The Grodan Uni-Slab is a stonewool growing slab for hydroponic and drip-fed crops, sold here as a case of 16 slabs measuring 9.5 x 8 x 4 inches. Its vertical fiber orientation and fully wrapped form are designed to spread water content and EC evenly across the slab, and it works with both top drip and flood systems. Each slab is light and inert, so it holds no nutrients of its own and needs a feeding schedule from the start.

Best forHydroponic growers running drip or flood systemsGreenhouse tomato, pepper and cucumber cropsGrowers who want uniform water and EC across a slabCommercial setups buying slabs by the case

Pros

Vertical fiber orientation helps distribute water and EC evenly
Fully wrapped slab blocks light and outside contaminants
Works with top drip and flood irrigation
Inert media gives full control over nutrient dosing
Case of 16 suits multi-slab or multi-plant layouts

Cons

Grodan Uni-Slab, Case of 16 prices at every store

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Grodan Uni-Slab, Case of 16 price history

Lowest price we've seen: $66.79 on Nov 7 at HTG Supply. Tracked across 1 store since Nov 7.

Specifications

Primary Use: Growing Media
Use: Single plant slab options, Multi-plant slab options
Type: Uni-Slab
Form: Slab
Material: Fibre
Quantity: 16 (case)
Size: 9.5 x 8 x 4

Questions and answers

What is a Grodan Uni-Slab used for?: It is a stonewool growing slab for hydroponic crops, placed under drip lines or in flood systems. Roots spread through the slab while you control the nutrient solution.
How many slabs come in a case?: The case contains 16 slabs, each 9.5 x 8 x 4 inches. That covers a multi-slab layout or several plants per slab.
Does it work with both drip and flood systems?: Yes. Grodan lists it for top drip and flood irrigation, and the wrapped slab is meant to keep water and EC uniform across the block.
Do I need to pre-soak the slabs before planting?: Yes. Stonewool is inert and starts dry, so soak and adjust the pH of the slab before you set plants or start irrigation.
Is this the right media for soil-style growing?: No. It is an inert hydroponic medium with no nutrients of its own. It suits growers running a controlled nutrient feed, not soil-based planting.

Our take on the Grodan Uni-Slab, Case of 16

Best forHydroponic growers running drip or flood systemsGreenhouse tomato, pepper and cucumber cropsGrowers who want uniform water and EC across a slabCommercial setups buying slabs by the case

Pros

Vertical fiber orientation helps distribute water and EC evenly
Fully wrapped slab blocks light and outside contaminants
Works with top drip and flood irrigation
Inert media gives full control over nutrient dosing
Case of 16 suits multi-slab or multi-plant layouts

Cons

Questions and answers

What is a Grodan Uni-Slab used for?

It is a stonewool growing slab for hydroponic crops, placed under drip lines or in flood systems. Roots spread through the slab while you control the nutrient solution.

How many slabs come in a case?

The case contains 16 slabs, each 9.5 x 8 x 4 inches. That covers a multi-slab layout or several plants per slab.

Does it work with both drip and flood systems?

Yes. Grodan lists it for top drip and flood irrigation, and the wrapped slab is meant to keep water and EC uniform across the block.

Do I need to pre-soak the slabs before planting?

Yes. Stonewool is inert and starts dry, so soak and adjust the pH of the slab before you set plants or start irrigation.

Is this the right media for soil-style growing?

No. It is an inert hydroponic medium with no nutrients of its own. It suits growers running a controlled nutrient feed, not soil-based planting.