When the plant is approximately 6 inches tall, trim off all the lower branches, leaving a crown of 3-5 healthy leaves. Dig a hole deep enough to bury the entire plant to the crown. Before you put the plant in the ground, drop in a handful of 3% rock phosphate and water well. The rock phosphate will force the plant to grow strong stems, and produce a lot of blooms & fruit. The portion of the plant buried in the ground will develop a root system, strengthening the plant.
I did that, and my Black Krim are 6ft tall with a lot of tomatoes. I'm just waiting for them to ripen.
A friend of mine picked up 2 tomatoe plants that had a sign on them that read “Save Me”, so she bought them and brought them to me. Now I’ll put them in a syrup pot with the 3/% rock phosphate. I’ll strip off all the stems and plant it deep. I’ll keep them in the open garage with the fan on. I have very little shade in my yard, except the front, facing the golf course.