Please tell me why every year my tomatoes gow well for about three weeks, then the leaves curl tightly inwards and become stunted. After a few more weeks they straighten out, but I lose gowing time. I sterilise the pots with Jeyes Fluid, and use new 'Miracle Gro' compost. I water generously with no liquid feed. Photo attached.

There are several reasons why tomato leaves may curl, including physiological. What size pots are they in, and is there a reason you don't want to grow them in the ground? Do you fertilize them at all? Is the Jeyes thoroughly rinsed off?

Containers around 6 gallons size. Not rinsed after Jeyes. No feeding at all. Grown in conservatory.
D