Pargro is the leader among affordable horticultural rockwool. Made right in the Grodan factory, so you can be assured of a high quality product at a great price. Drainage Driest value-priced rockwool on the market 14% drier than competitor’s blocks Value Value pricedno frills saves you money Half case sizes in plain boxes Quality Cheap in price, but rich in strength and uniformity Made under quality control at Grodan factories Comes in strips of 6 blocks