Grodan Delta 4 Block 3 in x 3 in x 2.5 in with Hole, Case of 48 Blocks

Grodan Delta 4 Block 3 in x 3 in x 2.5 in with Hole, Case of 48 Blocks

SKU #: HGC713055
Grodan Brand Product

Commercial Grower? Get Volume Pricing.

Availability: In stock

Lead time: Ships in 24-48 Hours


Grodan Product Documents

Grodan Rock Wool MSDS

Whether starting your seeds and cuttings in A-OK Starters, Macroplugs, or Mini-Blocks it is a good idea to transplant into a 3 or 4 block.

You know it's time to transplant to the Gro-Block when roots coming out of the starter are about 1 long. Just place your Mini-Block on top of the 3 or 4 block without the hole, or your Macroplug/A-OK into the 3 or 4 block with the hole and watch your plant flourish.

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 types of fibers. The purpose is to support the requirement of the plant in the different plant stages. Grodan has a tremendous capacity for absorbing nutrient solution while retaining plenty of oxygen for rapid plant growth. Grodan comes in graduated sizes. Seedlings started in cubes are easily transferred to blocks and then onto slabs, if desired. Seedlings or cuttings started in the Grodan cubes can also be transplanted into more traditional planters and growing mediums.

Grodan Blocks -Grodan Delta blocks are the most uniform blocks available on the market. They feature improved grooves at the base to promote better drainage. They are available in a large assortment of sizes and configurations to suit all types of plants. These growing blocks are used for direct sowing or "blocking on" of Macro and Multiblock raised plants. AO 36/40 plugs fit well into the hole sizes provided by the blocks. The blocks can then be placed on top of a slab to provide for a larger growing volume. Hugo is the largest of the growing blocks. It provides enough growing volume to support a larger plant, so it does not need to be placed on top of a slab.

Tech Specs


Weight (lb.)24
Prop 65No
Length (in.)24.5
Width (in.)16.5
Height (in.)24
Lead TimeShips in 24-48 Hours
UL ListedNo
Grow MediaRockwool
OMRI CertifiedNo

Grodan Delta 4 Block 3 in x 3 in x 2.5 in with Hole, Case of 48 Blocks Videos


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