Grodan Rockwool: 4in blocks (216/case)
Grodan Rockwool: 4in blocks (216/case)
$45
Stock Icon
Price: $175.00
Grodan rockwool is an excellent quality stonewool substrate with a very high water holding capacity.

Rockwool is absolutely free of disease, salts, and weed seeds. It has no Cation Exchange Capacity (CEC) so the grower can take advantage of a nutritional program specifically tailored to the crop being grown.

Rockwool blocks containing plants are set on top of the slabs and the roots grow through the block and into the slabs. Nutrient solution may be applied through a spray or drip emitter either directly to the slab or through the growing blocks. Blocks are commonly used for germination of seed and rooting cuttings. The vertically oriented fibers in blocks promote good downward root growth.

Sold in a case of 216 cubes only.

Customers who bought this also bought


Ebb & Flow Value Kit 4X8
Stock Icon

Price: $516.00
Sale Price: $429.00
You save: $87.00 (16.86%)
600W Digital Ballast Light Kit
Stock Icon

Price: $349.00
Sale Price: $319.00
You save: $30.00 (8.6%)
Black & White Poly ULTRA 6mil 10x100 Roll
Stock Icon

Price: $100.00
Sale Price: $90.00
You save: $10.00 (10%)
400W HPS Bulb UltraSun by Sunlight Supply
Stock Icon

Price: $39.00
Sale Price: $25.00
You save: $14.00 (35.9%)
400W MH Blue Enhanced Lamp 7500°K
Stock Icon

Price: $69.00
Sale Price: $55.00
You save: $14.00 (20.29%)


May We Suggest


Ebb & Flow Tray Fittings Kit 3/4"
Stock Icon

Price: $20.00
Sale Price: $15.00
You save: $5.00 (25%)
Cocomat CocoTek Grow Mat 4ft x 8ft
Stock Icon

Price: $75.00
Sale Price: $70.00
You save: $5.00 (6.67%)
Ebb & Flow Value Kit 4X4
Stock Icon

Price: $352.00
Sale Price: $299.00
You save: $53.00 (15.06%)