There are several issues with watering at night:

1. Automatic sprinklers can break. If your system breaks at 3am you may never know it until the grass dies in a few weeks. This is not a problem with bermuda nor with you because you have a manual system.

2. Disease can enter the picture when you don't have good water absorption into the soil and when you don't have good air movement over the grass. Hard soil can hold water in puddles and kill the beneficial microbes which prevent disease. This may or may not be a problem; however, bermuda hardly ever gets disease.

3. Sprinklers can become aimed in the wrong direction. If you water at night you might not notice until...as in 1 above, the grass dies. Again, this is not an issue for you.

Otherwise, watering at night allows the water to penetrate more deeply because you don't have the sun beating down on the soil evaporating it away.

A lot of it also depends on where you live. It's arid here, so diseases are less of a problem. And winds are more likely during the day than at night, so watering at night leads to less loss due to wind (as well as less loss due to evaporation before it hits the ground). But in some areas, watering at night is a bad idea.

So watering at night is ok as opposed to early morning? Am I missing something here?

"So watering at night is ok as opposed to early morning?"

It depends.

Depends on what?

I always water in the early evening. It's never been a problem for me. I live in a semi arid area and the humidity is nearly always low.

If it rains overnight, does that potentially cause disease as a sprinkler can?

Okay, so I live in eastern Kansas. I have to come to believe, through other articles, that it's best for the brown patch that my TTTF lawn has terrible problems with to water at night because it (a) supposedly rinses bad microbes off that the dew has in it that can make the fungus problem worse, and (b) because the grass is often wet anyways because of the dew.

Here in Kansas, you never know what the weather will be, but it's rare to have a night with the humidity less then 50% - often it's more like 70%-100%, and the wind varies, but typically there some breeze but not much. What is best for me? I've heard that watering in the morning just prolongs the time that the leaves are wet, but often there will be no dew when I turn the sprinklers on before bed.

I like the fact that it's long watering periods - soaking the soil deeply. I have never noticed standing water after a night of watering.

Any ideas? Thanks!

I think you'll be okay if you only water once a week and after 10pm. Here in NC we get rain at night all the time in the summer.

Watering at certain times is a load of BS, hows it any different from rain that can occour whenever

It's not different except that you have control over sprinkler irrigation. You can't help the rain watering at night... but why risk the problem with disease, etc. by irrigating at night if you don't have to?

I will say this: watering in the early morning can sometimes be more of a problem than watering at night. If you are getting dew at night, go ahead and water because the leaves. etc. are already wet. Watering in the morning will only increase the wetness period, increasing chance of disease.

The key is to avoiding problems is to NOT water frequently. You want the lane to be dry as much as possible, and your goal is to water as infrequently as possible. If you do that, it really doesn't matter when you water (night, morning, afternoon... whenever) because you aren't giving disease enough constant moisture to thrive. But this takes us back to square one: you can't control rain. Therefore, don't use sprinklers unless you have to.