How recurrently should I dampen my sunflower? the bottom leafs are turning yellow is it getting too much water

the bottom leafs are turning yellow is it getting too much water
Answers:    Watering should be commonly enough to keep the soil consistently moist. Daily watering will be requisite for much of the Summer, excluding periods of rain. To assistance retain moisture, cover the ground under and around sunflowers with a three inch deposit of straw, compost, leaves, ground cedar mulch or other suitable organic matter.
I hose down mine whenever the green part starts wilting. Mostly every day when its really hot, I put mulch around the bottom so the moisture is kept close to the roots instead of evaporating. Is it contained by the ground or in a pot? Sunflowers can take to a certain extent dry soil as long as the roots are well established..needs profoundly of sun also.