Grodan Delta 6.5 (4" x 4" x 2.5") are high-quality, professional-grade stonewool (rockwool) growing blocks used for hydroponic plant propagation and cultivation. They feature a pre-drilled hole for easy transplanting, optimized for transferring seedlings or cuttings to, encouraging strong root growth.
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Measuring :4 x 4 x 2.5” provide ample space for rooting, with a 2.5-inch height often preferred for faster drainage and improved oxygen levels.
- Pre-drilled Holes: Designed to accommodate standard 1.5-inch starter plugs (like Grodan AO 36/40), facilitating easy transplantation of seedlings or cuttings..
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Uniformity: These blocks ensure uniform water and nutrient distribution across the substrate, resulting in consistent plant growth.
