I use it. Seems to work pretty good. Especially on seeds. Have not tried it on my orange tree, but will later.

Jay I`ve tried Superthrive on all my plants except a few to to see if there was a difference in growth rates and being healthier. I can say that the ones using Superthrive grow better and are healthier looking than the ones without. I would just buy a small bottle to try it for yourself. There is a store in town that sells it I think its called "Better than Nature". I ordered mine online and paid a bit more for it.
John 8)

Thanks guys. I already picked up a 4oz bottle accross the line for $7 usd. I'm hoping it's like steroids for plants. 😀