When to Plant Hyssop in Oklahoma
Oklahoma spans USDA hardiness 6b to 8a (zones 6b to 8a on this page). Plant hyssop by your local frost date, not the calendar — pick your zone below for exact start-indoors, transplant, and harvest dates.
Jump to: Zone 6b · Zone 7a · Zone 7b · Zone 8a
Hyssop planting calendar for Oklahoma, Zone 6b
Average last spring frost
April 20
Average first fall frost
October 15
Start seeds indoors
Feb 23
Transplant outdoors
Apr 20
Projected first harvest
Jul 19
Hyssop is ready to harvest in about 90 days. Full zone 6 guide (both 6a and 6b) →
Hyssop planting calendar for Oklahoma, Zone 7a
Average last spring frost
April 15
Average first fall frost
October 20
Start seeds indoors
Feb 18
Transplant outdoors
Apr 15
Projected first harvest
Jul 14
Hyssop is ready to harvest in about 90 days. Full zone 7 guide (both 7a and 7b) →
Hyssop planting calendar for Oklahoma, Zone 7b
Average last spring frost
April 10
Average first fall frost
October 30
Start seeds indoors
Feb 13
Transplant outdoors
Apr 10
Projected first harvest
Jul 9
Hyssop is ready to harvest in about 90 days. Full zone 7 guide (both 7a and 7b) →
Hyssop planting calendar for Oklahoma, Zone 8a
Average last spring frost
April 1
Average first fall frost
November 10
Start seeds indoors
Feb 4
Transplant outdoors
Apr 1
Projected first harvest
Jun 30
Hyssop is ready to harvest in about 90 days. Full zone 8 guide (both 8a and 8b) →
Not sure which half-zone you're in? Set your ZIP in HomeSown for dates tuned to your exact location.
Varieties to grow
1 variety of hyssop in the HomeSown library. Tap any for its full grow guide.
Common problems with hyssop
What to watch for, with identification and treatment for each
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