Wasn't recommending the JI, and am not at all sure if it would even work. But looking at the some of the mixes online, it depends on which product. Providing a link to exactly which product you are thinking about, would help us to help you.

If you can get something without added nutes, it's easier to diagnose ailments and treat the lady without throwing the nute balance further off-kilter. But regardless...get good quality whenever possible, and make sure it's recommended for potted plants. :thumbsup: