Posted: 13/08/2015 at 09:13
Plant size can depend on the variety. 5ft is probably about average for an indeterminate variety. Are yours indoors or outdoors, annmarie? If indoors, the flowers can need help self-pollinating. Give them a flick with your fingers. You can do the same thing outdoors, too. It will help trigger the internal self-pollination process.
If you're feeding them, stop for a while. Fertilising, particularly over-fertilising, can hinder the production of flowers and, therefore, fruit.