Growing romanesco in zone 7b
(Zone 7b = an average winter low of 5°F to 10°F.)
In USDA zone 7b, the typical last spring frost is April 5 and the first fall frost is November 1. Here is when to plant romanesco against those dates.
Start seeds indoorsFebruary 22 to March 8
Transplant outdoorsApril 5
Expected harvestJune 19 to July 14About 75 to 100 days from transplanting.
These are zone 7b averages
Computed from 3,851 ZIP codes in zone 7b. Your town's frost dates vary; enter your ZIP for dates built on your nearest weather station.
Get my exact datesUSDA Plant Hardiness Zone Map, 2023. USDA Agricultural Research Service / Oregon State University PRISM Group. NOAA National Centers for Environmental Information, U.S. Climate Normals 1991-2020. Planting windows for romanesco from University of Wisconsin-Madison Division of Extension. Zone dates are medians; local conditions vary.