Leucanthemum x superbum, or Shasta Daisy, is robust, glabrous, herbaceous perennial of hybrid origin. Shasta daisies were introduced into the market in 1901 and have been the staple of American gardens for over 100 years. Famed horticulturist Luther Burbank crossed L. lacustre with L. maximum to create the hybrid. Lower leaves are oblanceolate to 1 foot (30.5 cm) long, with the upper leaves being coarsely toothed. Plants will reach up to 3 feet (0.9 m) tall. There are many cultivars available today, some even have frilly petals. Plants are very hardy in the landscape in USDA zones 4-9.
Blooming Time: Plants will bloom from June–September here in zone 7. The pure white, 4 inch (10 cm) wide heads are on long peduncles. Flowers have a long shelf life when used as a cut flower. Very showy.
Culture: Leucanthemum x superbum or Shasta Daisy does best in full sun to partial shade with a rich soil mix. On plants that we grow in the greenhouse, we use a soil mix consisting 2 parts peat moss to 1 part loam to 1 part sand or perlite. When grown in container, the plants are watered well and allowed to dry slightly before watering again. We fertilize plants in containers monthly during the growing and flowering season. When planted in the landscape, once plants are established they are very drought tolerant, one should give water in extreme drought periods and they should be fertilized monthly. During the winter month for plants in containers they are stored in our cool greenhouse with nighttime temperature of 48°F (9°C). In the landscape plants should be cut back to a few inches above ground level.
Propagation: Leucanthemum x superbum or Shasta Daisy are propagated by division of larger clumps or from seed. Seeds germinate in 14-30 days from sowing at 70°F (21°C).
Leucanthemum x superbum was featured as Plant of the Week June 11-24, 2010.
Guide to Past Plants-of-the-Week:
Cal's Plant of the Week was provided as a service by the University of Oklahoma Department of Microbiology & Plant Biology and specifically the late Cal Lemke, who used to be OU's botany greenhouse grower and an avid gardener at home as well. If the above links don't work, then try the overview site. You may also like to look at the thumbnail index. ©1998-2012 All rights reserved.