Well, I let 3 window boxes wither. One was petunias, one marigolds, and one Alyssum. The petunias were still green but brittle. The marigolds had a couple decent blooms still, and were not quite brittle. I cut off the tops of those two and gave them a moderate watering. It's pretty windy here so I might give them more water this evening. I know it might be a bit late in the season to get any more blooms (I am in New York City) but was this the right course of action?
Chris
PS: The Alyssum, which my wife never liked and would just as soon let die, was still plugging along nicely. Lots of blooms that are attracting the most amazing variety of blue, green and gold tiny flies.