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When to Plant St. John's Wort in Alaska

Alaska spans USDA hardiness 1a to 8b (zones 1a to 8b on this page). Plant st. john's wort by your local frost date, not the calendar — pick your zone below for exact start-indoors, transplant, and harvest dates.

Jump to: Zone 1a · Zone 1b · Zone 2a · Zone 2b · Zone 3a · Zone 3b · Zone 4a · Zone 4b · Zone 5a · Zone 5b · Zone 6a · Zone 6b · Zone 7a · Zone 7b · Zone 8a · Zone 8b

St. John's Wort planting calendar for Alaska, Zone 1a

Average last spring frost

May 24

Average first fall frost

August 25

🌱

Start seeds indoors

Mar 29

🌿

Transplant outdoors

Jun 7

🌾

Projected first harvest

Oct 5

J
F
M
A
M
J
J
A
S
O
N
D
🌱 Start indoors🌿 Growing outside🌾 HarvestTodayZone 1a (approximate)

St. John's Wort is ready to harvest in about 120 days.

St. John's Wort planting calendar for Alaska, Zone 1b

Average last spring frost

May 29

Average first fall frost

August 28

🌱

Start seeds indoors

Apr 3

🌿

Transplant outdoors

Jun 12

🌾

Projected first harvest

Oct 10

J
F
M
A
M
J
J
A
S
O
N
D
🌱 Start indoors🌿 Growing outside🌾 HarvestTodayZone 1b (approximate)

St. John's Wort is ready to harvest in about 120 days.

St. John's Wort planting calendar for Alaska, Zone 2a

Average last spring frost

May 24

Average first fall frost

September 5

🌱

Start seeds indoors

Mar 29

🌿

Transplant outdoors

Jun 7

🌾

Projected first harvest

Oct 5

J
F
M
A
M
J
J
A
S
O
N
D
🌱 Start indoors🌿 Growing outside🌾 HarvestTodayZone 2a (approximate)

St. John's Wort is ready to harvest in about 120 days.

St. John's Wort planting calendar for Alaska, Zone 2b

Average last spring frost

May 30

Average first fall frost

September 6

🌱

Start seeds indoors

Apr 4

🌿

Transplant outdoors

Jun 13

🌾

Projected first harvest

Oct 11

J
F
M
A
M
J
J
A
S
O
N
D
🌱 Start indoors🌿 Growing outside🌾 HarvestTodayZone 2b (approximate)

St. John's Wort is ready to harvest in about 120 days.

St. John's Wort planting calendar for Alaska, Zone 3a

Average last spring frost

May 30

Average first fall frost

September 10

🌱

Start seeds indoors

Apr 4

🌿

Transplant outdoors

Jun 13

🌾

Projected first harvest

Oct 11

J
F
M
A
M
J
J
A
S
O
N
D
🌱 Start indoors🌿 Growing outside🌾 HarvestTodayZone 3a (approximate)

St. John's Wort is ready to harvest in about 120 days. Full zone 3 guide (both 3a and 3b) →

St. John's Wort planting calendar for Alaska, Zone 3b

Average last spring frost

May 20

Average first fall frost

September 15

🌱

Start seeds indoors

Mar 25

🌿

Transplant outdoors

Jun 3

🌾

Projected first harvest

Oct 1

J
F
M
A
M
J
J
A
S
O
N
D
🌱 Start indoors🌿 Growing outside🌾 HarvestTodayZone 3b (approximate)

St. John's Wort is ready to harvest in about 120 days. Full zone 3 guide (both 3a and 3b) →

St. John's Wort planting calendar for Alaska, Zone 4a

Average last spring frost

May 15

Average first fall frost

September 20

🌱

Start seeds indoors

Mar 20

🌿

Transplant outdoors

May 29

🌾

Projected first harvest

Sep 26

J
F
M
A
M
J
J
A
S
O
N
D
🌱 Start indoors🌿 Growing outside🌾 HarvestTodayZone 4a (approximate)

St. John's Wort is ready to harvest in about 120 days. Full zone 4 guide (both 4a and 4b) →

St. John's Wort planting calendar for Alaska, Zone 4b

Average last spring frost

May 10

Average first fall frost

September 25

🌱

Start seeds indoors

Mar 15

🌿

Transplant outdoors

May 24

🌾

Projected first harvest

Sep 21

J
F
M
A
M
J
J
A
S
O
N
D
🌱 Start indoors🌿 Growing outside🌾 HarvestTodayZone 4b (approximate)

St. John's Wort is ready to harvest in about 120 days. Full zone 4 guide (both 4a and 4b) →

St. John's Wort planting calendar for Alaska, Zone 5a

Average last spring frost

May 5

Average first fall frost

October 1

🌱

Start seeds indoors

Mar 10

🌿

Transplant outdoors

May 19

🌾

Projected first harvest

Sep 16

J
F
M
A
M
J
J
A
S
O
N
D
🌱 Start indoors🌿 Growing outside🌾 HarvestTodayZone 5a (approximate)

St. John's Wort is ready to harvest in about 120 days. Full zone 5 guide (both 5a and 5b) →

St. John's Wort planting calendar for Alaska, Zone 5b

Average last spring frost

April 30

Average first fall frost

October 5

🌱

Start seeds indoors

Mar 5

🌿

Transplant outdoors

May 14

🌾

Projected first harvest

Sep 11

J
F
M
A
M
J
J
A
S
O
N
D
🌱 Start indoors🌿 Growing outside🌾 HarvestTodayZone 5b (approximate)

St. John's Wort is ready to harvest in about 120 days. Full zone 5 guide (both 5a and 5b) →

St. John's Wort planting calendar for Alaska, Zone 6a

Average last spring frost

April 25

Average first fall frost

October 10

🌱

Start seeds indoors

Feb 28

🌿

Transplant outdoors

May 9

🌾

Projected first harvest

Sep 6

J
F
M
A
M
J
J
A
S
O
N
D
🌱 Start indoors🌿 Growing outside🌾 HarvestTodayZone 6a (approximate)

St. John's Wort is ready to harvest in about 120 days. Full zone 6 guide (both 6a and 6b) →

St. John's Wort planting calendar for Alaska, Zone 6b

Average last spring frost

April 20

Average first fall frost

October 15

🌱

Start seeds indoors

Feb 23

🌿

Transplant outdoors

May 4

🌾

Projected first harvest

Sep 1

J
F
M
A
M
J
J
A
S
O
N
D
🌱 Start indoors🌿 Growing outside🌾 HarvestTodayZone 6b (approximate)

St. John's Wort is ready to harvest in about 120 days. Full zone 6 guide (both 6a and 6b) →

St. John's Wort planting calendar for Alaska, Zone 7a

Average last spring frost

April 15

Average first fall frost

October 20

🌱

Start seeds indoors

Feb 18

🌿

Transplant outdoors

Apr 29

🌾

Projected first harvest

Aug 27

J
F
M
A
M
J
J
A
S
O
N
D
🌱 Start indoors🌿 Growing outside🌾 HarvestTodayZone 7a (approximate)

St. John's Wort is ready to harvest in about 120 days. Full zone 7 guide (both 7a and 7b) →

St. John's Wort planting calendar for Alaska, Zone 7b

Average last spring frost

April 10

Average first fall frost

October 30

🌱

Start seeds indoors

Feb 13

🌿

Transplant outdoors

Apr 24

🌾

Projected first harvest

Aug 22

J
F
M
A
M
J
J
A
S
O
N
D
🌱 Start indoors🌿 Growing outside🌾 HarvestTodayZone 7b (approximate)

St. John's Wort is ready to harvest in about 120 days. Full zone 7 guide (both 7a and 7b) →

St. John's Wort planting calendar for Alaska, Zone 8a

Average last spring frost

April 1

Average first fall frost

November 10

🌱

Start seeds indoors

Feb 4

🌿

Transplant outdoors

Apr 15

🌾

Projected first harvest

Aug 13

J
F
M
A
M
J
J
A
S
O
N
D
🌱 Start indoors🌿 Growing outside🌾 HarvestTodayZone 8a (approximate)

St. John's Wort is ready to harvest in about 120 days. Full zone 8 guide (both 8a and 8b) →

St. John's Wort planting calendar for Alaska, Zone 8b

Average last spring frost

March 20

Average first fall frost

November 20

🌱

Start seeds indoors

Jan 23

🌿

Transplant outdoors

Apr 3

🌾

Projected first harvest

Aug 1

J
F
M
A
M
J
J
A
S
O
N
D
🌱 Start indoors🌿 Growing outside🌾 HarvestTodayZone 8b (approximate)

St. John's Wort is ready to harvest in about 120 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 st. john's wort in the HomeSown library. Tap any for its full grow guide.

St. John's Wort →

Common problems with st. john's wort

What to watch for, with identification and treatment for each

Four-Lined Plant BugCommon Stalk BorerGroundhogsAntsAphidsArmywormsAnthracnoseDamping-OffFrost & Cold InjuryGray MoldHerbicide InjuryMosaic Virus

🌱 Grow st. john's wort with a calendar built for your exact yard

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st. john's wort — full zone guide

All zonesZone 3 →Zone 4 →Zone 5 →Zone 6 →Zone 7 →Zone 8 →