Hi Mona, I see you're in India, so there is a possibility that your temperatures are too high for tomatoes, ideally they should be kept at 70 deg f, with a minimum night temp of 50 f, anything over 80 deg, and they will stop growing, and anything below 40 deg, and they will stop growing, and may even go blue with cold, Derek.

Presently it is 64 to 66 degree fahrenheit min. It is not gone above 80 for quite some time

Hi Mona, is that the night time temperature, if it is then it doesn't really want to be any higher in the daytime, 80 deg f is an absolute maximum for growth to continue, if the temperature is much above the 66 you mention, then I would be looking at ways of keeping them cooler, the optimum temp is 70 deg f through the day, they also like a fairly moist atmosphere, if the above doesn't apply, then the only thing I can think of is some kind of virus, of which there are many, Derek.

It finally grew. How long does it take to flower, any idea?

Maybe giving it some shade helped thanks:)

Hi, tomato plants usually develop quite quickly, in the UK we usually plant them round about may, allow them to grow 5 or 6 trusses, then stop them, as it will be too cold to ripen any more than this, they have usually finished by mid to end of september, so it's all over in about 6 months, as yours were in the ground in january, they should have developed quite a few trusses by now, and you should have been getting fruit for quite a while, Derek.

Umm... there is no fruit or even flowers

Hi Mona, I'm sorry, but I'm at a loss as how to explain this, I've never heard of this before, Derek.