by K. Marc Teffeau, Ph.D.
Vacation Time? in the landscape, it is also important to do some deadheading ~ cutting off the faded flowers ~ of your perennials in the flower bed. Many perennial flowers respond to deadheading by putting out more blooms. Examples of re-bloomers include
While July may be a popular vacation month, our gardens and landscapes do not take a vacation, so there is still plenty to do. Now is a good time to pay attention to how your perennial garden is doing. You can divide and replant bearded iris now. Dig them up carefully, and throw out the diseased and borer infested rhizomes. Iris leaves that are wilted and chewed are probably suffering from iris borer. The affected rhizomes are mushy and have a foul odor. Separate the rhizomes and dust the cut ends with sulfur to reduce potential rot problems. Plant the iris in full sun locations with the top of the rhizomes barely showing above the ground, and then water regularly. Do not use a mulch around iris as mulching tends to attract iris borers. Perennials, like yarrow and salvia, can be cut back now to encourage re-blooming later this summer. Just like we do with annual flowers
Threadleaf coreopsis 83