BLUE LACE FLOWER
syn. Didiscus coeruleus
Sunset zones: 1-24.
USDA zones: 5-10, winter hardy in zones 7-10
Height: 24 inches (60 cm).
Width: 9 inches (23 cm).
Three inch diameter, rounded umbels bearing small blue, lightly scented flowers per umbel.
Four inch long, pale green leaves.
Moist, well-drained, fertile soil.
Add complete organic fertilizer when planting in spring. Fertilize monthly through June.
Sow seed in February/March. Cover seed 1/16 inch. Germinate at temperatures of 65-70° F (19-21° C). Cover pots as the seeds need darkness to germinate. Germination will normally occur within 20-30 days. Harden seedlings off and plant outdoors after last frost.
Pests and Diseases:
Rainy Side Notes
Trachymene coerulea, or Blue lace flower as it is commonly called, is a beautiful flower that lasts a long time as a cut flower. The name comes from two Greek words—trachys meaning rough and stemon for stamen that refers to the stamens of one of the species. Related to Ammi majus, Blue lace flower is also a good addition for the cutting garden. Blue is an unusual color for the flowers of the Apiaceae family, although T. coerulea also comes in pink and white forms. In addition, it attracts beneficial insects to the garden.
Blue lace flower is perfectly suited to the maritime climate of the Pacific Northwest, needing cool conditions in order for it to flower. Plant six to eight inches apart and support with twigs. If seeds are started early, transplant carefully, as it is a tap-rooted annual. Dead-head spent flowers to keep it blooming all summer long.
Photographed in author's garden.