I checked my heirloom beefsteak tomato this morning. It has one green tomato, about 3.2" in diameter, but it's the only one. There are numerous blossoms on the plant, but none of them seem to be turning into tomatoes. Any ideas?
FYI: The plant is in a pot which holds about 1.5 to 2 gallons of soil. It's outside by a south-facing wall. I used some miracle grow granules to fertilize it, and gave it some iron as well. The leaves look healthy: no yellowing, curling, spots or those webby things.