Miracle Gro had nothing to do with what occurred.

I wouldn't transplant because it's likely you'll take some of those little buggers with them.

To start over, get some new plants.

Not sure Miracle Grow had anything to do with it. I would do some soil exploration on the other two plants. How long have these plants been in the ground?

What are the white worms?

I only blame miracle grow because I have 7 others planted in a mix of earthgrow brand topsoil mixed with cow manure and the are doing excellent. I was wondering why my triple crowns seemed stunted. I'm in Texas, zone 9 and bugs are a part of life here, so I know I'm probably jumping to conclusions with the whole miracle grow thing, but I received some beautiful plants from bob wells nursery and something just went terribly wrong. And the only difference between the 3TCs and the 7 others is the soil that was used; it's a raised bed filled with miracle grow, whereas the ones doing great are in a tilled 25' row of soil/manure. I do appreciate everyones responses, but I'm honestly not looking for answers because it's merely speculation at this point. I'm new to this and I just sum it up to an experience and learning something. I'm only venting I guess. Thanks to everyone for your support!

Oh, and all 3 TCs have been in the ground since March. They're growing slower than the ones planted in the other row a month later! I'm going to do the same with the other two TCs, dig around to see if they're affected. At this point, it doesn't matter. I'm going to of some work on that raised bed and replace them with cuttings from my ouachita, which seems to be doing really good. It's funny, I purchased the ouachita on a whim to round out my order and had the least amount of interest in it, but it's growing the fastest and looks very nice.

If you're going to dig them out and transplant them, try soaking them in a bleach solution, or a hydrogen peroxide solution. That might kill the worms and their eggs, or if you wash all the soil off the roots that alone might get rid of them.