I have a curly leaf kale plant growing in my garden beside the compost pile. I deadheaded it the first winter and since then it has grown into a 5-foot-tall tree-like plant. Is this normal? Is there anywhere that I can send a sample to be studied in case it is a unique specimen? The plant has been growing and producing for 3+ years and has not flowered.
Yes, it is normal. You probably have very mild winters there that don't kill the plant (it's very winter hardy) or cold enough to induce flowering. Enjoy!