When to Plant Asparagus in Washington
Washington spans USDA hardiness 6a to 9b (zones 6a to 9b on this page). Plant asparagus by your local frost date, not the calendar — pick your zone below for exact start-indoors, transplant, and harvest dates.
Jump to: Zone 6a · Zone 6b · Zone 7a · Zone 7b · Zone 8a · Zone 8b · Zone 9a · Zone 9b
Asparagus planting calendar for Washington, Zone 6a
Average last spring frost
April 25
Average first fall frost
October 10
Direct sow
Apr 25
Projected first harvest
May 2
Most asparagus mature in about 7 days. Full zone 6 guide (both 6a and 6b) →
Asparagus planting calendar for Washington, Zone 6b
Average last spring frost
April 20
Average first fall frost
October 15
Direct sow
Apr 20
Projected first harvest
Apr 27
Most asparagus mature in about 7 days. Full zone 6 guide (both 6a and 6b) →
Asparagus planting calendar for Washington, Zone 7a
Average last spring frost
April 15
Average first fall frost
October 20
Direct sow
Apr 15
Projected first harvest
Apr 22
Most asparagus mature in about 7 days. Full zone 7 guide (both 7a and 7b) →
Asparagus planting calendar for Washington, Zone 7b
Average last spring frost
April 10
Average first fall frost
October 30
Direct sow
Apr 10
Projected first harvest
Apr 17
Most asparagus mature in about 7 days. Full zone 7 guide (both 7a and 7b) →
Asparagus planting calendar for Washington, Zone 8a
Average last spring frost
April 1
Average first fall frost
November 10
Direct sow
Apr 1
Projected first harvest
Apr 8
Most asparagus mature in about 7 days. Full zone 8 guide (both 8a and 8b) →
Asparagus planting calendar for Washington, Zone 8b
Average last spring frost
March 20
Average first fall frost
November 20
Direct sow
Mar 20
Projected first harvest
Mar 27
Most asparagus mature in about 7 days. Full zone 8 guide (both 8a and 8b) →
Asparagus planting calendar for Washington, Zone 9a
Average last spring frost
March 1
Average first fall frost
December 1
Direct sow
Mar 1
Projected first harvest
Mar 8
Most asparagus mature in about 7 days. Full zone 9 guide (both 9a and 9b) →
Asparagus planting calendar for Washington, Zone 9b
Average last spring frost
February 15
Average first fall frost
December 15
Direct sow
Feb 15
Projected first harvest
Feb 22
Most asparagus mature in about 7 days. Full zone 9 guide (both 9a and 9b) →
Not sure which half-zone you're in? Set your ZIP in HomeSown for dates tuned to your exact location.
Varieties to grow
3 varieties of asparagus in the HomeSown library. Tap any for its full grow guide.
Common problems with asparagus
What to watch for, with identification and treatment for each
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