Why are my tomatoes not fruiting?

[JASPBE]

Follow up to last nights posted question - the tomatoes are harbinger and some of the flowers have died off they are about 4.5 ft high grown in large pots but still no fruit has grown I have pinched out side shoots and feed with tomato feed once a week. Could something of attacked it? Any ideas.

[tamborine]

they need to dry out to flower.

[Hawkwalk]

they do not need to dry out to flower. If you have flowers that have died off before setting fruit then it is probably because they have dried out that has caused them to die. It is possible that a pest has eaten the flower so you will have to look more closely for this. My guess would be a watering issue.

[carlton23]

Another tip is to tap the flower trusses a/m & p/m each day to make the pollen fall and self fertilise, but don`t allow to dry out or over water.