· Brent Wilson's Answer
· Hi Chun,
It sounds like what you saw was a flowering cabbage near the end of it's life cycle. In mid to late spring, when the temperatures begin to warm up, these plants produce a bloom stalk and begin to flower. This indicates the plant is close to dying.
Here's a link to a website that sells many varieties of flowering cabbage and flowering kale seeds. They also have pictures of the plants.www.seedman.com/flowcab.htm
Hope this was helpful. Let me know if you have any other questions.