Top 6 Rockwool Cubes 4×4 – Garden Fertilizers

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1. Twin Canaries Liquid Volume Conversion Chart

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Pack of 6 | + Twin Canaries Chart, Grodan Rockwool Delta GRO Blocks | 4" Cube

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Twin Canaries Liquid Volume Conversion Chart #ad - Comes with twin Canaries Liquid Volume Conversion Chart. Gro-block holes are the perfect size for any 1. 5" starter plug or macroplug. The bases of the gro-blocks are grooved to promote drainage and to avoid "wet feet". Plants can be fully grown in these gro-blocks. Each block is 4" x 4" x 4" with a hole at the top.
BrandTwin Canaries Liquid Volume Conversion Chart #ad
ManufacturerTwin Canaries Liquid Volume Conversion Chart #ad

2. Twin Canaries Liquid Volume Conversion Chart

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Redrock Rockwool 4" PRO Grow Block for Hydroponics | 6 Pack + Twin Canaries Chart

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Twin Canaries Liquid Volume Conversion Chart #ad - Each block measures 4-inch x 4-Inch x 4-Inch with 42/40 Hole. Stone wool grow blocks are made in the USA. Stone wool has high fiber density makes better use of water and fertilizers while allowing dry back. Comes with 6 4" redrock rockwool 4" PRO Starter Blocks and 1 Twin Canaries Chart. Redrock stonewool grow blocks PRO are priced for commercial agriculture production.
BrandTwin Canaries Liquid Volume Conversion Chart #ad
ManufacturerTwin Canaries Liquid Volume Conversion Chart #ad

3. Grodan

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Pack of 5 | + Twin Canaries Chart, Grodan Rockwool Wrapped GRO-Blocks | 4" Cube

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Grodan #ad - Each block is 4" x 4" x 4" with a hole at the top. Comes with twin Canaries Liquid Volume Conversion Chart. The bases of the gro-blocks are grooved to promote drainage and to avoid "wet feet". Gro-block holes are the perfect size for any 1. 5" starter plug or macroplug. Plants can be fully grown in these gro-blocks.
BrandGrodan #ad

4. Pargro

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Pargro Quick Drain Blocks, 4" x 4", case of 72, Wrapped

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Pargro #ad - Cheap in price by not in strength and uniformity. Value priced - no frills saves you money. Driest value-priced Rockwool on the market. Case includes 72 cubes. 14% drier than competitor blocks.
BrandPargro #ad
ManufacturerHydrofarm, Inc. #ad
Height4 Inches
Length4 Inches
Weight0.15 Pounds
Width4 Inches
Part NumberRW103702W
ModelGL56713230

5. Grodan

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Grodan Rockwool, 4x4x2.5in. Cubes, 6 pack w/holes

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Grodan #ad - Seedlings or cuttings started in cubes can be transplanted into more traditional planters. Absorbs nutrient solution while retaining plenty of oxygen for rapid plant growth. Seedlings started in cubes are easily transferred to blocks and then onto slabs. Use to support the requirement of the plant in the different plant stages. Made from molten rock spun into cotton candy-like fibers and then compressed into cubes.
BrandGrodan #ad
ManufacturerGrodan #ad
Height2.5 Inches
Length4 Inches
Width4 Inches

6. Grodon

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Grodan Rockwool Cubes 4 X 4 X 4 Inches 6 Pack With Holes

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Grodon #ad - Does not contain nutrients. An inorganic and sterile growing medium made from spun molten rock. Condition by soaking for eight hours. A superior medium for rooting cuttings. Provides 20% air space when saturated.
BrandGrodon #ad
ManufacturerGrodon #ad
Weight0.75 Pounds