Flower of an Hour (Hibiscus trionum)

Description
Flower of an Hour (Hibiscus trionum) - also called bladder hibiscus, bladder weed, or venice mallow - is an annual hibiscus family plant that forms multiple striking cream color blossoms with purple centers. Easy to start from seed, plants reach 4-5 feet tall and flowers give way to papery seed pods. Plants are frost sensitive.

Specifications
Common Name:Flower-of-an-Hour
Scientific Name:Hibiscus trionum
Description:A hibiscus native to Europe named for its ephemeral flowering window.
Plant Lifespan:Annual
Cold Hardiness (F):Zone 9b (25 to 30)
Light Requirements:Full Sun (min. 6 hours a day)
Seed In:Spring-Summer
Seeding Depth:1/8 in.
Days to Sprout:3-7
Optimal Soil Temperature (F):70
Plant Spacing:18-36 in.
Plant Height:3 ft.
Average Days from Seed to Harvest:100