Growing globe artichoke in zone 5a
(Zone 5a = an average winter low of -20°F to -15°F.)
In USDA zone 5a, the typical last spring frost is May 3 and the first fall frost is October 5. Here is when to plant globe artichoke against those dates.
Start seeds indoorsJanuary 11 to February 15
Transplant outdoorsApril 5 to April 12
These are zone 5a averages
Computed from 2,383 ZIP codes in zone 5a. 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 globe artichoke from Utah State University Extension. Zone dates are medians; local conditions vary.