GRODAN ROCKWOOL 2 INCH A-OK SHEET OF 50 AO 50/40
Grodan A-OK 50/40 2in x 2in Plugs (50/Sheet)
This sale is for one sheet of rockwool, on that sheet is 50 squares.
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.
(50 squares per sheet)
Sold Individually by the sheet.
All Grodan stonewool should be pre-conditionedbefore using because in the manufacturing process,a smidgen of lime (pH 8) is added to the binder in themaking of the fibers. For this reason, a simple presoakin water adjusted to pH 5.5 is recommended.Flush to waste with nutrient solution, then plant.This washes out the lime and rockwool will no longerinfluence the pH. As the plant grow, the pH willrise (only once the plant is rooted). This is a naturalresponse to the plant consuming the nutrients. KeeppH between 5.5-7 for optimum nutrient uptake.There is only a miniscule amount of lime that ispresent in raw rockwool. So for starters, justsubmerge them in a bucket or container with a 5.5 pHwater solution for 10 seconds, then drain to waste.
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