Japanese beetles feed on a rose blossom.Summer can cause problems for plants. From humidity to bugs, from inconsistent temperatures to rain, gardens are often at the mercy of Mother Nature.
Bugs, in particular Japanese beetles, can be problematic for plants. This year, said Kat McGraw, day manager at Ooltewah Nursery, the beetles seem to be short-lived, lasting only two or three weeks. In that short time, however, insects can do damage, eating rosebuds or tender leaves on trees and shrubs such as hydrangeas. Insecticides are available. However, she said she doesn’t prefer them as they can cause harm to beneficial bugs such as bees and ladybugs.
Heat and humidity can cause issues as well.
“This year we’ve seen a lot of fungus, especially powdery mildew, and it’s because we’ve had a variation in temperature,” said McGraw.
Even the hardy Knockout roses, which are meant to be hardy, have had problems, she said.