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Item: 498 
8 		8" Grodan Rockwool Slab
Grodan rockwool slab. 8 inches wide. 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 is available as growing slabs, growing blocks, or granulated. Slabs are rectangular pieces of rockwool that are designed for long term crops such as greenhouse-grown vegetables and cut flowers. 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.


Price: $8.05
Qty.:

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GRODAN rockwool blocks slabs Grodan slab growing Capacity inches wide excellent quality stonewool substrate high water holding absolutely disease salts weed