Sunday, June 21, 2009
Wishbone flower (Torenia fournieri)
Wishbone flower is a bushy annual that typically grows 6-12” tall and is noted for its ability to bloom well in shady conditions. Species plants feature two-lipped, tubular, trumpet-shaped, bicolor flowers with broadly 5-winged calyxes. Species flowers are pale violet with dark blue-purple lower lips and a yellow throat blotch. Cultivars expand the range of flower colors to include shades of burgundy, pink, rose, lavender and white. A pair of stamens unites at the anthers in a shape resembling the wishbone of a chicken, hence the common name. Toothed, oval, light green leaves (to 3” long). Genus honors Olof Toren, an 18th century Sweedish chaplain.
How to grow
Annual best grown in consistently moist, organically rich, well-drained soils in part shade to full shade. Although sometimes classified as a warm weather annual, this species of Torenia is not terribly fond of hot and humid summer weather. Given this they will bloom constantly from early summer until frost if deadheaded. Young plants may be pinched to promote compact, bushier growth. Container plants may be brought indoors for winter bloom. Hardiness is USDA Zones 6 - 9. Wishbone flower thrives in warm, humid climates. It is a tender annual that needs temperatures above 40°F (5°C). It does not tolerate frost. For the best effect, plant them close together, about 6 in (15 cm) apart. Sow the seed the soil, do not cover them. Germination in 7-10 days with temperature above 70°F.
When to grow
Start seed indoors 6-8 weeks before last frost date or sow seed directly in the garden just before last frost date. It is annual plant in tropic weather.
They make great plants in masses in borders and flower beds. It is also for window boxes, pots and hanging baskets as long as you don't allow them to dry out between waterings.