Romanesco Broccoli Seeds (Organic)

Broccoli - Romanesco - Brassica oleracea (Botrytis Group) Annual Heirloom. The broccoli and cauliflower families both lay claim to this dramatic vegetable. Discovered in 16th century Italy, it sends up small spirals that curve to form a large spiral head. Break it apart and eat it raw or steamed. Prized for its delicate, nutty flavor as well as its vivid, light green color. May reach 3' before producing. The broccoli head shape is a fractal called the Fibonacci Spiral. Soil and Water: Prefers nearly neutral soils rich in organic matter.

Variety Details

• Botanical name: Brassica oleracea var. botrytis
• Plant type: Annual
• Growth habit: Upright
• Crop category: Cabbage
• Kitchen profile: Annual Heirloom.
• Recorded feature: Open-Pollinated
• Product format: Seed packet with a separately listed bulk option

Sowing & Growing

• Soil Temperature: 70-85°F
• Planting Depth: 1/4"-1/2"
• Germination: 7-14 Days
• Height At Maturity: 3'
• Days to Maturity: 75-100 Days
• Sun/Shade: Partial Sun
• Spacing After Thinning: 18"-24"

Schedule Romanesco Broccoli for the cool-season planting window appropriate to your climate. Start seed in a protected setting or direct sow when the product record allows, then thin or transplant so each plant has room to develop. Check moisture at root depth and adjust irrigation to weather and soil rather than a universal schedule. As maturity approaches, inspect head, stem, or leaf development according to the crop type and harvest at the preferred size and firmness.

Lime the soil to a pH of 7.0 or higher in areas with clubroot problems.

Planting and Growing: Time indoor sowing so that plants are no more than 5 weeks old at transplant time.

Sow outdoors when soil temperatures are at least 60°F.

A temperamental plant, sensitive to under watering or under fertilization.

Before sowing Romanesco Broccoli, review the packet alongside the current product details and note any range in temperature, germination, or maturity. Ranges reflect biological and seasonal variation rather than a fixed promise. Label each planting with its date and location, then compare emergence, growth, and harvest with local weather. This record is useful for succession plantings and for deciding whether the crop fits better into an earlier or later seasonal window.

Explore related options in our Broccoli Growing Guide.