GROW!T Commercial Coco, RapidRIZE Block 4"x4"x3"

GROW!T Commercial Coco is Hydrofarm's premium growing media brand, designed specifically for the professional grower. The entire GROW!T Commercial Coco line is laboratory tested for heavy metals, so your plants are growing in the purest coco available. This high-quality coco coir is processed indoors to remove debris and contaminants. Repeated washings and buffering are applied to achieve extra-low ppm/EC levels, so you can apply nutrients and supplements the same day you plant.

GROW!T Commercial Coco 4”x4”x3” block is designed for the vegetative stage. These small blocks easily fit into propagation trays, and help maximize the number of plants in early stages of growth. RapidRIZE blocks come compressed for easy shipping and storage but expand fully in about 1 minute after saturation. All RapidRIZE blocks are designed with a wide, low-profile shape to accommodate the specific rooting pattern of your favorite herbaceous annual plants.

• Premium Buffered Coco Coir
• RadidRIZE Blocks with Super-Fast Expansion
• Low PPM/EC and Tested for Heavy Metals

Technical Data

• Size: 4" x 4" x 3" | Brand: GROW!T | Type: Commercial Pre-Buffered Coco Propagation Block
• RapidRIZE coco formula comes pre-buffered with calcium and magnesium for immediate use
• Compressed block expands when hydrated; no additional buffering required before use
• Optimized for rapid root development and direct transplanting into larger coco containers
• OMRI Listed — suitable for certified organic production

Instructions for Use

• Hydrate block with pH-adjusted water (5.8–6.0) until fully expanded
• No additional buffering required; block comes pre-treated for immediate use
• Place cutting or seedling into block and maintain moisture until roots are established
• Transplant directly into a larger coco or other substrate container when roots emerge from the block
• Use diluted nutrient solution (EC 0.6–1.0) after the first week to support early root development