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  • … of trumpet-shaped flowers are a bright, cheerful pink, and the show generally continues for 4 to 6 weeks. Some people like it next to a doorway, so they can enjoy the fragrance. Others … a specimen or hedge. Bees, butterflies, and hummingbirds love Weigela , and so do gardeners. For a plant that gives you so much to look at, they're very easy to care for. No particular disease or pest problems. No special soil requirements. No deadheading. Just …
    Type: Garden Guide Plant
  • … can develop into larvae and then into adult mosquitoes in water that has been left standing for seven to ten days. Beginning in April until the first hard frost, weekly check your property, garden, alley, home exterior, and garage for any standing water or debris that might hold even the slightest amount of water. Household … or loose windows. Clean gutters of all debris so rainwater never pools. Check flat roofs for low spots that retain water. Empty wading pools once a week. Store indoors when not in use. …
    Type: Plant Info
  • … recognizable and beloved wildflowers, but there are a few things you may not know about them. For one thing, there are several wild species of Rudbeckia growing in the region and several cultivars with bigger and/or fancier flowers that have been developed for people’s gardens. My favorite, sweet black-eyed Susan (Rudbeckia subtomentosa) , is a native … or ray) of an individual flower called a ray or ligulate flower. I know this is hard to get your head around, since the entire heads of many tiny flowers are arranged in a way that …
    Type: Blog
  • … The brilliant blossoms are those of butterfly milkweed or butterfly weed—curious common names for Asclepias tuberosa , which isn’t a weed at all. A more suitable name might be “butterfly … flowers). Like common milkweed, the flowers on butterfly weed are lightly fragrant. A Magnet for Monarchs A member of the milkweed genus Asclepias (uh-SKLEE-pee-us), butterfly weed is a host plant for the female monarch butterfly, which may lay its eggs on the underside of the leaves. Monarch …
    Type: Plant Info
  • … large during the winter months, but will usually close during the growing season. It is common for these cracks to reopen the following winters and close again in the summers. While these … can allow diseases and other organisms to infect the tree, there is no treatment specifically for frost cracking. Keeping the tree healthy is the best way to protect it from decline. Focus on … If the tree leafs out abnormally in the spring, have the tree assessed by a certified arborist for safety. Please contact Plant Information Service at (847) 835-0972 or …
    Type: Plant Info
  • … My work is focused on breeding novel ornamental cultivars that are well-suited for the harsh environmental conditions of the Upper Midwest, with a preference for native taxa.  Traits of interest in our breeding program include new flower characteristics, … grass), and Vernonia (ironweed), will continue, several additional genera are being considered for future breeding. Before joining the garden, I earned my B.S. in Plant Sciences at Cornell …
    Type: Staff bio
  • … Green Mist amsonia is a cultivar selection of the native Arkansas amsonia noted for its deep green foliage. Its blue flowers, threadlike foliage and golden fall color are typical of the species. Members of the genus Amsonia are commonly known as bluestars for the abundant small blue flowers borne in clusters at the stem tips in late spring or early … and more than 3,5000 individual plants. A number of these varieties have been evaluated for their performance in our region; Plant Evaluation Notes can be found on the Garden's website. …
    Type: Garden Guide Plant
  • … At 12" tall and wide, it is shorter than most bluestars. It would be a good candidate for a rock garden. Members of the genus Amsonia are commonly known as bluestars for the abundant small blue flowers borne in clusters at the stem tips in late spring or early … and more than 3,5000 individual plants. A number of these varieties have been evaluated for their performance in our region; Plant Evaluation Notes can be found on the Garden's website. …
    Type: Garden Guide Plant
  • … in spring. Climatic conditions can change from sunny and mild to blizzard conditions in a day. For outdoor photographers, this presents challenges. Learn specific ways to prepare and compensate for the rollercoaster of photography, then head outside to practice. Jack Carlson, certified …
    Type: Item Detail
  • … of highly dissected 2- to 3-inch leaves and grows 2 to 3 feet tall. It is a wonderful plant for a flower border. Single, yellow, daisy-like flowers, 1-1/2 to 2 inches in diameter, are profuse during the summer. Deadhead for an additional autumn burst of color. The threadleaf coreopsis is an easy-to-grow, sun-loving …
    Type: Garden Guide Plant