JTULL5 said:

I have several tomato plants growing in pots on our deck, in south east PA.
One of the tomatoes is being grown in a 5 gallon plastic container. It was a
chlorine container which was thoroughly washed several times, with numerous
holes drilled in the bottom.

The plant is about 3 1/2 feet tall and is starting to produce a few tomatoes.

The problem:
The leaves are beginning to curl, especially on the bottom half of the plant.

If the plants seem otherwise green and healthy, I would put this down to
physiological leaf roll. Some tomato varieties have and inherited characteristic
(the wilty gene) which makes the leaves tend to roll. This occurs on the older
leaves typically after the plants begin bearing fruit.

--
Pat in Plymouth MI ('someplace.net' is comcast)

Any technology distinguishable from magic is insufficiently advanced.
(attributed to Don Marti)