Question
I have a New Guinea Impatient Plant that was beautiful for about one week.  I live in upstate NY and our night time temperature has been dropping into the 40's.  Is that low enough to damage my plant?  Otherwise I have no clue what's up with it.

Answer
Alice,
Yes - the night temps you are having will cause New Guinea Impatiens to sulk and turn yellow.  The northeast and midwest have had a very cool June, and these plants don't do well when the night temps drop below 50. The good news is that they will probably recover and do well once the weather improves. Don't keep it too wet, but don't let the plants wilt in dry soil either. When you water, try not to get the foliage wet as that will cause mold on the older flowers or leaves in cool weather.  Wait for any more fertilizer until the temps warm and the plant starts to grow.

I hope this helps,
C.L.