(10/01/19) BATON ROUGE, La. — Louisiana homeowners and landscapers should be on the lookout for a new Super Plant that will add color to the winter landscape. Jolt dianthus is a cool-season bedding plant that blooms from fall through early summer.
“Some of the best cool-season bedding plants we have available in Louisiana are interspecific dianthus, and the Jolt series dianthus are no exception,” said LSU AgCenter horticulturist Jeb Fields.
Jolt offers a more compact interspecific dianthus when compared to Amazon dianthus, which was named a Louisiana Super Plant 2010.
“Moreover, Jolt dianthus are some of the most heat-tolerant interspecific dianthus we have, making them a perfect addition to your Louisiana landscape,” Fields said. “Jolt will continue to bloom into the early summer, giving you that extra push to carry your landscape into the warm season.”
Jolt can be planted in early fall in Louisiana landscapes. Like most bedding plants, they are susceptible to extreme freezing temperatures in winter, so be sure to take appropriate actions if it gets too cold, Fields said. However, Jolt can tolerate temperatures into the low 20s.
Jolt can be planted in late winter for an amazing pop of color throughout the spring and early summer.
Along with the striking bloom colors of Cherry, Pink and Pink Magic, Jolt dianthus have excellent dark green foliage that provides additional pop to the bloom color, Fields said. They also are great for attracting butterflies in late fall and early spring.
Jolt performs best when planted 8 to 12 inches apart in full sun. The upright, mounding plants will grow 16 to 18 inches tall and 12 to 14 inches wide.
They can be grown as a border planting or used in containers. “Jolt makes great cut flowers for arrangements,” Fields said.
As with all Louisiana Super Plants, Jolt dianthus should be available in any local nursery or garden center, he said.
Jolt Cherry dianthus, Jolt Pink Magic dianthus and Jolt pink dianthus lined up in containers show the differences in coloration. Photo by Ashley Edwards/LSU AgCenter
Jolt Cherry dianthus grows in a trial garden at the LSU AgCenter Hammond Research Station. Photo by Ashley Edwards/LSU AgCenter
The LSU AgCenter and the LSU College of Agriculture