I dont know if it is for soil to be honest with you. It may be though...surely somebody else has used it in soil, but I have not. It's a root stimulator which is supposed to maybe cover the roots in something helping them stay healthier longer. I dont know...bottom line the shit works and it works well. I have only ever used it in hydroponic situations so I can only speak to it's effectiveness there. When I use it I typically use it only during the cloning stage and early veg stage. After that I figure there are enough roots in the damn pot already so no reason to keep using the good stuff. It retails for 40 a litter I think.

Plants need roots and a ton of them before they will produce healthy vegetation and then finally fruit. Best way to kick start the program is to kick start root development and products like hydrogyzeme do just that. I'm sure somebody has a more scientific less hopped up answer then I have for you at the moment.

Should you use it??? Why not, if you got a bottle of the stuff just lying around. Otherwise give me a call (not collect please) and I'll take it off your hands. However, unless you intend to rapidly reproduce your grow every month, month after month, I see no reason for you to buy it ever again. I figure unless it's something you really are looking for, why use? The difference between those that do and those that dont would be time. As long as your prepared to wait a little longer for nature to do it's thing, then no reason to keep using it. If on the other hand you want a setup that has you cloning every 6 weeks, then hydrogyeme is probably going to become a stable in your regime.