Grodan Starter Rockwool 1" Cubes

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Price: ~~$24.00~~
Sale Price: $20.00

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Easy to use, sterile, pre-formed material, known to have a high germination success rate.

Rockwool is the most popular growing medium used by hydroponic growers.

Each 10"x20" Rockwool sheet has 98 1" cubes.

IMPORTANT: Make sure you adjust your nutrient solutions before adding it to a hydroponic system.

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