Only if the water lies on the leaves then this magnifies the sun's rays and will
scorch the leaf.
The water will have more effect in early morning or after sundown as the plant can take it in better.
It depends. I have found that most impatiens prefer shade, and need water, especially if they are in a pot. New Guinea impatiens can take full sun, but again, watering is very important.
The impatiens balsamina crave the shade, so if they're in a very sunny area and exposed to heat and direct sun, they will droop. Sometimes frequent watering may help, depending how hot it is. Otherwise, they may have to be moved to the shade in order to survive.
Possibly it is one of the stem rot fungal diseases. Over-watering can be one cause, especially in humid or still weather. Copper-oxychloride can help, or remove plants and burn. Don't try replanting impatiens or similar there for a couple of years.
Begonias, violas, fuchsias, sweet potato vine, impatiens.
Impatiens hawkeri was created in 1886.
Bombus impatiens was created in 1863.
Coprinellus impatiens was created in 1821.
Impatiens platypetala was created in 1846.
Impatiens grow best in part to full shade.
Deer love to eat Impatiens. They just ate our neighbors Impatiens last night....barely a one left! !
The New Guinea impatiens are a wonderful choice when used as hanging flowers and in the pots.
Yes Impatiens are consider an annual flower. However if you live in hardiness zones 9-11, that will grow as a perennial.