Coco-Fiber Planting Medium

Coco-Fiber Planting Medium is one of the simplest upgrades you can make for your trees and plants. This all-natural coconut fiber brick expands to over 2 gallons of loose, airy growing medium — improving drainage, encouraging deep root growth, and helping your soil hold the right amount of moisture for healthier plants.

Works With Any Soil Type

Whether you’re dealing with heavy clay that suffocates roots or sandy soil that dries out too fast, coco fiber improves it. It loosens compacted clay to let roots breathe and spread, while adding water-retaining structure to sandy or loose soils. The result is a more balanced root environment that gives your trees and plants the best possible start.

Why It’s Worth Adding at Planting Time

• All-natural & sterile — made from coconut husks, free of pathogens and weed seeds
• Resists compaction — stays loose and porous over time for better air circulation
• Improves moisture retention — reduces watering frequency without waterlogging roots
• Easy to use — just add lukewarm water and the brick expands to 2+ gallons of ready-to-use medium
• Great value — one brick provides enough coir for approximately 4 trees

How to Use

Add lukewarm water to the brick as directed and allow it to fully expand. Mix the expanded coco fiber into your planting hole or potting mix before setting your tree or plant. It’s especially effective when used alongside Stark Bro’s bare-root trees and potted plants at planting time.