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Sprout Authority

Growing sweet marjoram 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 sweet marjoram against those dates.

Start seeds indoorsFebruary 22 to March 8
Direct sow outdoorsMay 3

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 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 sweet marjoram from UC Master Gardeners of Santa Clara County (UC Agriculture and Natural Resources). Zone dates are medians; local conditions vary.