North Spore ‘Boomr Bag’ Manure-Based Sterile Mushroom Bulk Substrate - Pallet of 168 cloning-and-seed-starting Magnesium Carbonate and Magnesium Sulfate

Magnesium Carbonate and Magnesium Sulfate

3” in length

ground and aerial applications

perfectly balanced construction

This and all Growth Science products are safe to use in automated delivery systems such as Dosatron® and other fertilizer injectors

North Spore ‘Boomr Bag’ Manure-Based Sterile Mushroom Bulk Substrate - Pallet of 168 cloning-and-seed-starting Magnesium Carbonate and Magnesium SulfateBest selling Boomr Bag is a sterile bulk mushroom substrate formulated by mycologists to increase the yield of your grow. It features a proprietary blend of composted horse manure, coco coir, and several quality substrate supplements (although we keep the exact blend a secret!) Over several years, it has been perfected for dung loving mushroom species and is widely trusted by mushroom growers. Note: Substrate is hydrated to field capacity. Use your