Cleome is unusual not only for its height, but also because of the long wispy stamen hanging down from the upright flowers. Hence, it is more commonly called spider flower. It grows anywhere from 3 to 6 feet tall from summer into fall, and is available in pink, purple and white. Because of its size, this annual works well along fences, or at the back of gardens where they would get some protection from the wind. Some people find its fragrance offensive, so you may not want to plant it close to open windows.
After the last frost, choose a sunny location with soil that drains well. If you live in a cold climate, you may wish to start with established plants, since seeds need warm temperatures to germinate. Set plants into the ground at the same depth as their dirt enclosure, and water well. Space additional plants 12 to 18 inches apart. If you choose to use seeds, just press them lightly into the soil since they require light in order to germinate. Spider flower reseeds easily, so deadheading improves its appearance and prevents excessive spreading.