Grodan Delta Starter Mini-Blocks 2" - 24 Pack

Give seeds and cuttings a clean, consistent start with Grodan 2 in Mini-Blocks. Each pack holds 24 individually wrapped stone wool blocks, sold in easy tear-away strips, so you can use as many as you need and keep the rest clean and dry. Grodan stone wool has a mix of small and large pores, which holds plenty of water while leaving room for air, giving roots a steady supply of moisture and oxygen. The vertical fiber structure helps roots spread evenly for a strong root system and uniform plants. Water and nutrients move uniformly through the block, making EC and pH easy to control. The white wrap keeps light off the sides to cut down on algae. When rooted, plant into coco, soil, or a larger Gro-Block.