patsyann, I do not know how big these transplants are; but my opinion is that tomatoes prefer two conditions - a free draining medium and regular mounding up to grow well.
From what I have seen, the 'newer' generation of potting soils are too moisture-retentive for tomatoes.
Long ago and far away, we used "burnt earth" - imagine brown lava rock crushed to the size of pea-rock - was used to improve the drainage of tomato beds.
The material was produced by burning clay and wood slowly to make a road building material. It was also fairly acid - as evidenced by the many rusted-out vehicles.

Please read this post.

Here is a link that might be useful: Container Soils