Spider Flower (Cleome hasslerana) http://www.durgan.org/URL/?SFVFG 17 August 2009 (Cleome hasslerana) Spider Flower This is an annual, seeds are simply spread on the ground in a suitable location, after the last frost. The flower comes in many colors and blooms most of the late summer. It should be thinned to about a foot apart for best results. The plant is often grown in municipal gardens, and is a good place to collect some seed pods, of which, many are produced.