Romanesco Broccoli is a variety of the species Brassica oleracea. It is a cool weather crop that enjoys a steady diet of nutrients. We fertilized with fish emulsion every other week.
The beauty of Romanesco lies in its unique flower structure. When we consume Romanesco, other than the stems we are eating flower buds.
These flower buds are very well known in science circles for being a natural example of the Fibonacci fractal. In mathamatics a Fibonacci fractal will go on forever, ad infinitum. A broccoli plant obviously does not go on forever, but the pattern does repeats itself in every bud.
This article explains it well, Fibonacci-Shaped Romanesco Broccoli Is the World’s Most Visually Stunning Vegetable
See other natural fractals in this Wired gallery.
Other than being really healthy for you, Romanesco broccoli is a cool way to bring math into the classroom.
Here’s one place to purchase seeds, Baker Creek Heirloom Seeds.