I would like to know how often that I should water my flower garden.

A well planted one should require little to no watering, I don't water my
plants any more, just the initial planting.... if it doesn't make it here under
those conditions, it's not going to make it here..... I of course don't plant
in really hot weather, at this rate I will be able to plant through December
here in Connecticut.... the weather has been HORRID since January.
Colleen