This soil comparison was conducted by an independent  third-party, without the knowledge or influence of either manufacturer. 

1) All tomato plants in this comparison were planted at the same time in mid-March.
2) Varieties planted include – Super Sweet 100, Roma, Yellow Pear, Jelly Bean Yellow and Jelly Bean Red.
3) Results shown as of May 3rd, 2011
4) Both potting mixes were screened through 1/8th inch mesh to assure consistent particle size.
5) All growing conditions including irrigation, sunlight and temperature are identical for all pots.