I think they tend to be OK in sun as long as its not ALL day - so if they were shaded by the house or trees till after lunch they would probably be OK
ETA in the UK they are used a lot for formal borders in parks etc. so generally in full sun, but it depends how hot it gets where you are - if its very hot they do need a bit more TLC (and water!)
New Guinea Impatients are a full sun plant. The flowers look the same, but the leaves are different.
My house faces west too, but I have very hot summers, and I have to plant them in shade, or early morning sun only, in pots.
Good Luck!!
I wonder if it is regional because here New Guinea Impatients are shade plants and don't do well in sun at all.
Hmmm... they are sold here on the east coast as full sun. However, when I googled them, it was mixed part shade and full sun...so you are right. Beats me . I have good luck with them, but they don't like to be dry, so I keep mine facing east with morning full sun (I hate to water that much!)
/quote]
I always plant them in part shade because they really don't seem to like too much sun. I don't like to water twice a day, and when I planted them in full sun it seemed that I was watering them all the time.