I've never used the fertilizer before, but I checked out the product on the OrganicRX website and it looks safe to use. It should work out well for your vegetating plants, but you'll probably still want to keep a synthetic fertilizer on hand for use in times of need.

Like most products, this one seems a bit over-hyped. The website claims that toxic buildup isn't possible, but I'd still use it in moderation until you know how a vegging plant will react to it. If you actually decide to follow the instructions for "faster results" and use several times per week, I'd still plan on flushing periodically...especially if using at full strength. Keep a close eye on your pH, too.