Once the seed germinates and begins to grow, the preemergent herbicides are no longer effective. Many people have asked about freeze damage on emerged flowers and leaves. Last year, we did find some deformed terminal growth when plants had emerged prior to a late freeze. This might occur again. If you find leaf deformities later in the season, the freezing temperatures we experienced during this past week could be the culprit.
Homeowners worry about bulbs and other early flowers.
Most flowers, with the exception of saucer magnolia can tolerate freezing temperatures. Cooperative Extension Education in Agriculture and Home Economics, University of Delaware, Delaware State University and the United States Department of Agriculture cooperating. John C. Nye, Dean and Director. Distributed in furtherance of Acts of Congress of May 8 and June 30, 1914. It is the policy of the Delaware Cooperative Extension System that no person shall be subjected to discrimination on the grounds of race, color, sex, disability, age, or national origin.