Gardening

Downy mildew has been a big problem on impatiens plants in the eastern part of the U.S., and it can also get on plants in the cucumber/squash family. Moisture/high humidity encourages its spread. If it has infected your impatiens, there's not much you can do except get rid of the infected plants to keep it from spreading, and be sure the remaining ones aren't spaces close together. The fungus spores can survive the winter in some parts of the country, so depending where you are, next season you should plant something in that spot other than impatiens.