How to Plant, Grow, and Care for Romanesco Broccoli (Roman Cauliflower)
You’ve probably seen the unique intricacies of Romanesco broccoli while perusing seed catalogs and passed on them because they look complicated. But I assure you, if you’ve mastered growing broccoli or cauliflower, you’re ready for this adventurous vegetable! Join organic....
farmer Jenna Rich as she attempts to convince us all to grow it while teaching us how to care for it successfully.
Is it broccoli, cauliflower, or intricate garden artwork? Romanesco broccoli is an heirloom cousin of these two brassicas and deserves a place in your garden, not solely for its unique beauty but also for its nutrition and culinary flexibility.
Even if you’ve never grown a brassica, it’s easy to learn. You can grow these beautiful babies with space, sunlight, and fertile, well-draining soil. I’ll admit to thinking this funky heirloom was a hybrid due to its color and intricacies. However, Romanesco broccoli has been grown for centuries.
Let’s explore how to plant, grow, and care for it.
What Is Romanesco Broccoli?
Romanesco broccoli is one of the most stunning vegetables. Its bright chartreuse color and geometric patterns often confuse consumers, leaving them wondering if this large-headed crop is a cauliflower, a broccoli, or something else entirely.
It’s an heirloom cousin of both crops, not a hybrid, as some might suspect. A cultivar of cauliflower, its texture is similar: soft, firm, and crumbly but with a nutty, sometimes spicy flavor. Its spiky, cone-shaped florets form a unique logarithmic shape, proving that Mother Nature is a true artist! Its peaked, spiraled head displays the Fibonacci sequence, a fantastic example of this pattern.
Romanesco broccoli is eye-grabbing and exciting enough to be a housewarming gift or worked into your next charcuterie board at game night. Our Botanical Interests community loves it for its hardiness and gorgeous fractals. It is sometimes called fractal broccoli, Roman cauliflower, or Romanesco cauliflower.
Brief History
This unique broccoli is believed to date back to the 15th or 16th century. Consumers are often confused by Romanesco broccoli, referring to it as broccoflower. Broccoflower, while delicious and nutritious, is a hybrid green-colored cauliflower. You’ll know you’re dealing with the Italian heirloom by its spiraled and peaked florets. Today, it’s adored by home gardeners, farmers’ market shoppers, and chefs.
Scientists recently broke the code that causes this intricate, exciting pattern. Now, the genetic code may be used to alter genes of other crops to create new cultivars.
Uses
Its uses are similar to those of broccoli and cauliflower, and it is enjoyed both raw and cooked.
Roast it along with root vegetables and drizzle it with olive oil. Serve it alongside a protein and a fresh green salad.
Use it in place of broccoli or cauliflower on a charcuterie board or steamed with a light cheese sauce.
Chop it up and add it to soups, casseroles, and egg bakes.
Eat it raw with hummus or creamy dill dip.
Steam and sprinkle it with light salt and pepper for a healthy snack.
It contains high levels of vitamins A, B, C, and K and is a good fiber source. It also contains high levels of phytochemicals, which can reduce inflammation, control blood sugar levels, and be easy to digest. Its bright green color indicates its levels of carotenoids and chlorophyll.
Appearance
This giant chartreuse head of “broccoli” is full of spiraled fractals. The number of spirals always represents a Fibonacci number. When cut in half, the peaks resemble the tops of pine (Christmas) trees. It’s cruciferous, so its texture is soft and crumbly like cauliflower.
Each five to six-inch head can weigh up to five pounds and is encased in dark green leaves at the base. Each plant will grow to about three feet tall with a 24-inch spread.
Native Area
This Italian heirloom was once grown in Rome in the 15th or 16th century. While it’s not often seen at the grocery store, it is a popular crop among small-scale farmers who vend at farmers’ markets and local food co-ops.
How to Grow
Grow Romanesco broccoli in the ground, in greenhouses, or containers. Proper fertilization is crucial to their success, and caution should be used in peak summer to prevent plants from going to seed prematurely.

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