I'm using fabic pot this yr myself. I've put a 4th of July hybred in a 5 gallon smart pot.This will give me my tomato fix until i put out the other 20 plants come early may.lol I put it out during the day and bring in at night.Its still chilly in Mo. at night. This tomato is growing like crazy. The first set of blooms i got 5 tomatoes on.I'm using 60% miracle grow and 40% cow manure. I'm fertilizing with tomato tone. I've had plant 5weeks but I'm very happy with the results..It may just be luck

I've grown veggies in smart pots for four years and grew them in Al's 5-1-1 mix for the first time last year. I am a complete convert now. And please note that you don't need to screen anything for 5-1-1. But, since you've already made up your mind, I will say I had decent results using three parts good quality potting mix (Metromix 510, which includes composted bark) to one part compost. If your fabric container is large enough (at least 10-15 gallons) and in contact with the ground, you can use a heavier mix than you would need in a plastic pot.

Not the dreamer., The miracle grow i used was "potting mix" Not potting soil

Thanks to everyone for your input!