The seeds from the gardening store are probably not the varieties being grown commercially. The seeds or starters sold at the gardening store are an easy step up from commercial plants, regardless of how you grow them.
If you've ever seen a truck full of tomatoes, you can see why commercial growers grow the tomatoes they do. They need firm rocks that can survive being covered by several feet of other tomatoes. They pick them early and choose varieties that are optimized for disease resistance, firmness, etc.
If you've ever seen a truck full of tomatoes, you can see why commercial growers grow the tomatoes they do. They need firm rocks that can survive being covered by several feet of other tomatoes. They pick them early and choose varieties that are optimized for disease resistance, firmness, etc.