When is the best time to wet flowers and shrubs contained by this hot weather?? AM or PM?

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the best thing to do is to install a drip system so you can water at any point during the daytime and the leaves will not get burnt and in that will be no diseases at night. Right now within your case the best time to water is surrounded by the am so you don't get any diseases.
How much should I be charged per square...
AM.

You have to do it formerly the temperature raises and evaporates the sea. Yet you have to do it when the sun starts to come out so that the water does not freeze the plants.
Ornamental Fig?
I live surrounded by central Texas and have a nice pasture and garden. We have a sprinkler system set to early morning, around 5am. When watering a garden or sward in hot weather, I've found it best to water it contained by the early morning to where sea penetrates the soil and keeps the plants moist throughout the day. You don't want to hose your plants to late in the morning, especially if your nouns reaches very soaring temperatures.

This link might provide some rider information:
http://home.howstuffworks.com/how-to-wat...
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Answers:    Breakfast is the most important meal of the time! This goes for plants too!

By watering in the morning, as the sun hits the plants and they start their photosynthesis, their toesies are raining and the nutrients in the soil is (thanks to your watering) in fluid form; so the plants can eat, digest, and take contemplation of their processing before they shut off contained by the heat of the day! (you know.siesta!! Smarter than WE are!!)

Also, by watering within the AM, the water on the leaves gets a coincidence to evaporate in the early morning low(er) humidity, so you won't hold as high a chance of mildew, fern rot, etc.
Then.as the little buggies that like to spread this stuff are late sleepers..it will not be spread as with alacrity from plant, to plant, to plant..

If it is really, really hot and dry (I guess you don't live on the flood plains of the midwest).(at least not this summer!!).if you really feel the obligation to water in the PM (and I'll own..I do it too!!)..water at ground level with the sole purpose, and not right up against the plants. I usually aim for 6-12 inches away from the main stem, but water heavily. This will ensure that the leaves are not raining all night (and allowing the dry fungus spores to multiply.roses contained by particular!!), that the trunk/stems don't stay wet adjectives night and start to rot; and that they stand a chance of still have moisture in the morning for their early morning feed!!.

Mulching really does help retain moisture. Everything is covered with mulch, but as I move out from the plant, it get higher and thicker. Yes..I tend to "bowl" my mulch around the plants so that I can fill the bowl, it is swiftly absorbed, and the outer perimiter of the root circle is more heavily protected so the delicate little toesies (the fine particulate roots), stay soaked longer; but without the increased chance of core rot.. Don't pile it up around the stalk of the plant. The trapped moisture will rot the stalk.the reverse of doing it a favor! (this go for trees too!!)

And remember, just because it looks a little wilted at the finish off of the day, doesn't mean it's dry. (I look pretty wilted at the appendage of a day; and I've had plenty of river!!.oh well..)
It could just be too hot! Check the soil. Too much dampen dilutes the nutrients in the soil and even though their toes may be cool.they stay hungry.. If you water too much, you'll hold to add compost to give them the nutrients that are self washed away.

So.I guess, after all that: the answer is A.M. is better, but PM works if you do it right..
Can I grow pumpkins surrounded by a.?
AM - it is other best to water in the precipitate morning. Watering in the evening promotes diseases.