Annual vegetable
Romanesco plant profile
Brassica oleracea var. botrytis
An annual vegetable for full sun.
Last updated .
When to plant
When to plant Romanesco
Start seeds indoors
6 weeks before your last spring frost to 4 weeks before your last spring frost
Transplant outdoors
at your last spring frost
Growing conditions
- Sun
- Full sun
- Lifecycle
- Annual
- Spacing
- 18 to 24 in apart
- Days to maturity
- 75 to 100 days (from transplant)
Common problems
Watch for these
Evidence trail
Evidence behind this profile
Original extension and institutional publications behind the planting, care, and safety facts on this page.
- Romanesco
University of Wisconsin-Madison Division of Extension. Supports indoor seed-starting timing (derived), outdoor transplant timing (normalized), and days to maturity (direct). Checked 2026-06-18.