Underground Mix
Transplant-time root booster in a simple powder
$21.99
Guaranteed germination · Free US shipping over $50 · Discreet packaging
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Our take
Underground Mix is a 14 oz powdered root-zone supplement from Homegrown Cannabis Co., applied once at transplant to support root growth and early vigor. It works in any medium — soil, coco, or hydro-adjacent setups — which makes it an easy add-on for first grows where strong early roots set up everything that follows.
Growing notes
Use it when you move seedlings into their next pot: dust the transplant hole or root ball, then water in. Because it's a one-time application at transplant, it slots into any feeding schedule without conflicting with your base nutrients. One 14 oz container covers a full home grow's worth of transplants.
New to growing? Start with the complete guide, plan your gear with tent setups, and diagnose problems with troubleshoot.
