In hydroponic growing or soilless growing, the growing medium takes the place of soil and helps support the plant roots and maintain a good water/oxygen ratio. CropKing offers a variety of soilless growing media including Rockwool blocks and cubes. Products $12.25 Perlite Horticulture Coarse, 4 Cu. Ft. $10.00 1"x 1"x 1.5" Pad of 200 AO25/40 Cubes $10.00 1"x 1"x 1.5" Pad of 200 AX25/40 Cubes $10.00 1.5"x 1.5"x 1.5" Pad of 98 AO36/40 Cubes $0.82 Empty Perlite Grow Bag 3mil $7.95 Perlite 20 Quart $7.00 Filled Perlite Grow Bag $23.75 Leca Stone, 45 Liters $4.00 1.6"x 1.6"x 1.6" MM40/40 Cube (Strip of 15) $5.50 2"x 2"x 1.6" MM50/40 Cube (Strip of 12) $0.55 3"x 3"x 2.5" DM4-G Block w/ 1-1/2" Holes $0.68 4"x 4"x 2.5" DM6-G Block w/ 1-1/2" Hole $4.75 Vital Slabs 5.9x3x39.4" Slab $5.65 Vital Slabs 7.9x3x35.4" Slab $6.25 Vital Slabs 7.9x3x39.4" $92.50 Oasis Horticubes Thincut 276ct. Single Dibble Case 20 Sheets $92.50 Oasis Horticubes Thincut 276ct. Multi Dibble Case 20 Sheets $92.50 Oasis Horticubes XL 162 Single Dibble Bottom Groove Case $92.50 Oasis Horticube XL 1 1/2" 50ct Single Dibble Bottom Groove $60.00 Burlap Roll 100 yd $92.50 Oasis Multi Dibble Top Groove 104ct 1 1/4" $64.95 BioStrate Roll $293.00 BioStrate Sheet $1.17 4"x 4"x 4" DM10-G Block w/ 1-1/2" Hole $22.00 3.75" Wide BioStrate Roll $8.00 Micro-Seed Jute Pad (10 pack) $35.00 Micro-Seed Jute (Roll) $1.10 Grodan® Rockwool Cress Plate Additional Information Rockwool Jute Perlite Oasis Burlap BioStrate