With some experience in horticulture I can say that generally
watering does not enhance flowering.What is needed is optimum moisture
content in the soil. In fact for all the annual seasonal flowering
plants, the horticulturist advise the growers to withhold water at
the time of flowering. This is my experience too. Furthermore, many
of the plants do not flower properly during rainy season due to
improper sunlight. Of course there are exceptions. This particular
plant might fall in that group.
On Feb 2, 9:12 pm, Pankaj Kumar <sahanipan...@gmail.com
> In my garden this plant used to have flower throughout the year. But
> flowers were luxuriant during rainy season. And as the name suggests,
> this blooms at night. This is a water loving plant I assume and hence
> needs watering everyday. That may enhance flowering in your area.