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Growing romanesco in zone 8b

(Zone 8b = an average winter low of 15°F to 20°F.)

In USDA zone 8b, the typical last spring frost is March 17 and the first fall frost is November 14. Here is when to plant romanesco against those dates.

Start seeds indoorsFebruary 3 to February 17
Transplant outdoorsMarch 17
Expected harvestMay 31 to June 25About 75 to 100 days from transplanting.

These are zone 8b averages

Computed from 3,378 ZIP codes in zone 8b. Your town's frost dates vary; enter your ZIP for dates built on your nearest weather station.

Get my exact dates

USDA 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.