The What For Our biochar and frass dream team are back and bigger than ever. This 3L pouch means you can start dishing those microbes out amongst your outdoor plant fam. Enough for the indoor crew, the balcony crew and that lifeless bed around the side of the house. Can be stirred through new potting mix when repotting, or sprinkled around the root ball to bring life to old mixes. Also great to add to composts to speed up decomposition. Here are a few reasons to add this double act to your Plant Care kit: * You don’t have to be rich but your soil should be. Frass holds about 240 million microbial colony forming units per gram. It holds up to 200 times more nutrients than worm castings or compost with more diversity of microbes too.