Grodan Grow-Cubes

SKU: HGC713095

153.97 153.97 USD 153.97


Grow-Cubes™ are small loose 1/2-inch cubes of stonewool. Advantages are better aeration, maximum drainage so that you can hardly ever overwater your plant, easy mixing with other loose media (such as expanded clay rocks or coconut fiber), and lightweight and much cleaner than peat-based media. The properties of Grow-Cubes™ make it like a 50/50 mix of absorbent to repellent stonewool.

  • Grodan Product Size

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Grodan Grow-Cubes

For growers seeking a forgiving, easy-to-use loose-fill media, Grodan Grow-Cubes are an excellent choice. Composed of uniform 1/4” cubes of stone wool, Grodan Grow-Cubes offer many advantages over other soilless potting mixes:

  • Grow-Cubes do not compact and compress together, but instead, stack inside the container leaving air pockets that guarantee the roots constant access to oxygen, promoting high metabolic rates and continual root development.
  • Grow-Cubes drain easily, naturally retaining a 50% water to 50% air ratio.
  • When mixed with non-restrictive media (e.g. expanded clay balls) a very desirable blend of root aeration and homogenous moisture content can be achieved for extremely vigorous growth and bloom.

Lightweight — approximately 1/10 of the weight of a bag of potting soil.

What is Rockwool?

Grodan Stonewool (RockwooRockwool) 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 in 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 solutions 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.

Weight (lbs)19.95
Length (in)23.6
Width (in)18.3
Height (in)22.8