Question
Hi Nick
Yes, it's me again!  Some of my plants (Dianthus) are getting white leaves and
others white marks here and there on the leaves.  Also my Pentas that looked
great are starting to wilt.

Thanks
Paula

Answer
Hi Paula! welcome back, there will be a lot of peculiarities this time of the year due to the colder nights; especially with the pentas, they will tend to wilt from the cold. Try to refrain from watering after noon, you don't want any of your flowers (or any plants for that matte) to go into the night with wet leaves, this is an invite to fungus development; this is the time of year where many plants get fungus problems (and this could very well be the problem with your Dianthus). Dry into the night is the remedy to ward off this problem. Nick