Introduced and assessed as invasive in the lower 48 states
iNaturalist's volunteer curators list it as introduced in their Ohio checklist.
US-RIIS assesses a species as invasive when it causes, or is likely to cause, harm there, or is at least locally abundant and harmful ecologically, economically, or to health.
Season shown in 0 of Ohio's 88 counties. Explore Ohio
No result yet (6)
Recorded, too few records for a result (60)
Recorded, season not shown (22)
Season shown (0)
Boundaries: U.S. Census Bureau, 2025 Cartographic Boundary Files, 1:500,000. Show as a table
Counties as a table
great mullein by Ohio county: records and mapped range
County
Records
Adams County
Recorded, too few records for a result
Allen County
Recorded, too few records for a result
Ashland County
Recorded, too few records for a result
Ashtabula County
Recorded, too few records for a result
Athens County
107 · Recorded, season not shown
Auglaize County
Recorded, too few records for a result
Belmont County
Recorded, too few records for a result
Brown County
Recorded, too few records for a result
Butler County
72 · Recorded, season not shown
Carroll County
Recorded, too few records for a result
Champaign County
Recorded, too few records for a result
Clark County
Recorded, too few records for a result
Clermont County
35 · Recorded, season not shown
Clinton County
Recorded, too few records for a result
Columbiana County
Recorded, too few records for a result
Coshocton County
Recorded, too few records for a result
Crawford County
Recorded, too few records for a result
Cuyahoga County
136 · Recorded, season not shown
Darke County
Recorded, too few records for a result
Defiance County
Recorded, too few records for a result
Delaware County
31 · Recorded, season not shown
Erie County
32 · Recorded, season not shown
Fairfield County
Recorded, too few records for a result
Fayette County
No qualifying records yet
Franklin County
89 · Recorded, season not shown
Fulton County
Recorded, too few records for a result
Gallia County
Recorded, too few records for a result
Geauga County
24 · Recorded, season not shown
Greene County
48 · Recorded, season not shown
Guernsey County
Recorded, too few records for a result
Hamilton County
119 · Recorded, season not shown
Hancock County
Recorded, too few records for a result
Hardin County
Recorded, too few records for a result
Harrison County
Recorded, too few records for a result
Henry County
Recorded, too few records for a result
Highland County
Recorded, too few records for a result
Hocking County
20 · Recorded, season not shown
Holmes County
Recorded, too few records for a result
Huron County
No qualifying records yet
Jackson County
Recorded, too few records for a result
Jefferson County
Recorded, too few records for a result
Knox County
Recorded, too few records for a result
Lake County
29 · Recorded, season not shown
Lawrence County
Recorded, too few records for a result
Licking County
24 · Recorded, season not shown
Logan County
Recorded, too few records for a result
Lorain County
Recorded, too few records for a result
Lucas County
113 · Recorded, season not shown
Madison County
Recorded, too few records for a result
Mahoning County
Recorded, too few records for a result
Marion County
Recorded, too few records for a result
Medina County
Recorded, too few records for a result
Meigs County
Recorded, too few records for a result
Mercer County
No qualifying records yet
Miami County
Recorded, too few records for a result
Monroe County
No qualifying records yet
Montgomery County
62 · Recorded, season not shown
Morgan County
Recorded, too few records for a result
Morrow County
Recorded, too few records for a result
Muskingum County
Recorded, too few records for a result
Noble County
Recorded, too few records for a result
Ottawa County
25 · Recorded, season not shown
Paulding County
Recorded, too few records for a result
Perry County
Recorded, too few records for a result
Pickaway County
Recorded, too few records for a result
Pike County
Recorded, too few records for a result
Portage County
25 · Recorded, season not shown
Preble County
Recorded, too few records for a result
Putnam County
No qualifying records yet
Richland County
Recorded, too few records for a result
Ross County
Recorded, too few records for a result
Sandusky County
Recorded, too few records for a result
Scioto County
Recorded, too few records for a result
Seneca County
Recorded, too few records for a result
Shelby County
Recorded, too few records for a result
Stark County
37 · Recorded, season not shown
Summit County
108 · Recorded, season not shown
Trumbull County
Recorded, too few records for a result
Tuscarawas County
Recorded, too few records for a result
Union County
Recorded, too few records for a result
Van Wert County
No qualifying records yet
Vinton County
Recorded, too few records for a result
Warren County
30 · Recorded, season not shown
Washington County
Recorded, too few records for a result
Wayne County
20 · Recorded, season not shown
Williams County
Recorded, too few records for a result
Wood County
41 · Recorded, season not shown
Wyandot County
Recorded, too few records for a result
No mapped range from the range source used, the USGS Gap Analysis Project, which maps land vertebrates only.
Season
When it is recorded
In Ottawa County
Not enough evidence
The weeks are still too uncertain to show a season. Based on 25 records in 8 of the 10 years from 2016 to 2025, above the minimum of 20 records from 5 different years.
JanFebMarAprMayJunJulAugSepOctNovDec
Show over the bars
Recording in Ottawa County · records of all species each week, 13,333 in all
Records per week from 25 records in 8 of the 10 years from 2016 to 2025. Shows when people recorded it, not a season or how common it is.
Show as a table
Records of great mullein in Ottawa County each week, and records of all species
Week
Records of great mullein
Years recorded
Records of all species
Jan 4–10
0
0
42
Jan 11–17
0
0
40
Jan 18–24
0
0
41
Jan 25–31
0
0
14
Feb 1–7
0
0
22
Feb 8–14
0
0
22
Feb 15–21
0
0
37
Feb 22–28
0
0
78
Mar 1–7
0
0
65
Mar 8–14
0
0
41
Mar 15–21
0
0
62
Mar 22–28
0
0
79
Mar 29 – Apr 4
0
0
79
Apr 5–11
0
0
80
Apr 12–18
0
0
189
Apr 19–25
1
1
235
Apr 26 – May 2
1
1
203
May 3–9
1
1
557
May 10–16
1
1
1,468
May 17–23
0
0
1,043
May 24–30
2
1
430
May 31 – Jun 6
0
0
351
Jun 7–13
0
0
223
Jun 14–20
0
0
267
Jun 21–27
1
1
463
Jun 28 – Jul 4
1
1
405
Jul 5–11
4
3
376
Jul 12–18
1
1
448
Jul 19–25
4
2
387
Jul 26 – Aug 1
0
0
406
Aug 2–8
0
0
430
Aug 9–15
2
2
814
Aug 16–22
1
1
447
Aug 23–29
0
0
353
Aug 30 – Sep 5
2
2
430
Sep 6–12
0
0
406
Sep 13–19
0
0
448
Sep 20–26
0
0
366
Sep 27 – Oct 3
1
1
274
Oct 4–10
0
0
280
Oct 11–17
0
0
169
Oct 18–24
2
2
136
Oct 25–31
0
0
105
Nov 1–7
0
0
81
Nov 8–14
0
0
136
Nov 15–21
0
0
40
Nov 22–28
0
0
53
Nov 29 – Dec 5
0
0
51
Dec 6–12
0
0
36
Dec 13–19
0
0
31
Dec 20–26
0
0
42
Dec 27 – Jan 2
0
0
52
Reported in flower
No records here show flowers yet, so there is no flowering season to show. One needs at least 20 records from 5 different years.
Reported in fruit
No records here show fruit yet, so there is no fruiting season to show. One needs at least 20 records from 5 different years.
In Ohio
Early March to late October, middle week Jul 5–11
Middle week · Jul 5–11
This week · Nov 8–14
JanFebMarAprMayJunJulAugSepOctNovDec
Show over the bars
Recording in Ohio · records of all species each week, 1,691,199 in all
Records per week from 2,007 records in 10 of the 10 years from 2016 to 2025. Shows when people recorded it, not how common it is. The grey bars show how many records of all species were made here each week, so you can see when recording itself was high or low; the season is not adjusted by them.
Recorded on 1,099 dates. Latest record: December 2025.
Show as a table
Records of great mullein in Ohio each week, and records of all species
Week
Records of great mullein
Years recorded
Records of all species
Jan 4–10
6
5
6,211
Jan 11–17
5
4
5,146
Jan 18–24
17
5
4,645
Jan 25–31
11
4
4,698
Feb 1–7
8
3
6,023
Feb 8–14
8
3
5,888
Feb 15–21
9
4
5,436
Feb 22–28
12
5
6,846
Mar 1–7
16
7
8,321
Mar 8–14
11
5
10,384
Mar 15–21
30
7
12,620
Mar 22–28
31
6
13,949
Mar 29 – Apr 4
36
6
19,661
Apr 5–11
65
9
26,860
Apr 12–18
50
7
39,925
Apr 19–25
54
9
41,623
Apr 26 – May 2
63
9
56,391
May 3–9
47
9
52,952
May 10–16
46
8
53,785
May 17–23
41
9
57,698
May 24–30
43
8
54,651
May 31 – Jun 6
41
8
53,099
Jun 7–13
45
7
53,700
Jun 14–20
82
8
56,625
Jun 21–27
81
10
55,361
Jun 28 – Jul 4
122
10
58,477
Jul 5–11
121
10
61,336
Jul 12–18
105
8
64,722
Jul 19–25
113
7
69,753
Jul 26 – Aug 1
65
9
59,416
Aug 2–8
50
9
59,712
Aug 9–15
53
10
55,994
Aug 16–22
35
8
54,328
Aug 23–29
28
7
51,772
Aug 30 – Sep 5
42
7
57,167
Sep 6–12
44
9
59,075
Sep 13–19
31
7
54,543
Sep 20–26
29
8
45,860
Sep 27 – Oct 3
52
10
43,180
Oct 4–10
41
7
37,841
Oct 11–17
53
7
30,824
Oct 18–24
30
9
21,156
Oct 25–31
28
9
19,021
Nov 1–7
25
8
14,172
Nov 8–14
14
7
12,621
Nov 15–21
13
4
7,965
Nov 22–28
6
5
8,136
Nov 29 – Dec 5
12
7
6,083
Dec 6–12
8
6
6,004
Dec 13–19
7
6
5,423
Dec 20–26
7
3
5,661
Dec 27 – Jan 2
15
6
8,459
Reported in flower
Usually reported in flower mid-June to mid-August, middle week Jul 5–11.
From 62 records that show flowers. Not every photo of a plant in flower is marked as flowering, so this shows when people reported it in flower, not when it flowers.
Reported in fruit
Only 16 records here show fruit, too few to show a fruiting season. One needs at least 20 records from 5 different years.
What these results show
These results show when people recorded a species, not when or where it occurs. Missing weeks and low counts do not mean absence or scarcity, and counts are not abundance. Contributed records reflect where, when and what people chose to observe.
Identification
How to identify it
Telling it apart
From what Ohio’s records show. Only what the records support is shown.
woolly hedgenettleStachys byzantinaOften confused in Ohio: 36 identifications in Ohio named one where the other was meant
purple foxgloveDigitalis purpurea60 identifications worldwide named one where the other was meant
moth mulleinVerbascum blattaria54 identifications worldwide named one where the other was meant
Rose campionSilene coronaria26 identifications worldwide named one where the other was meant
hound's-tongueCynoglossum officinale21 identifications worldwide named one where the other was meant
From iNaturalist’s similar-species counts, refreshed monthly: confusions in Ohio first, then worldwide. Only species with an Ohio result are listed.
Land cover where it is recorded
Land cover
Its recordsAll Ohio records
Developed
59%49%
Forest
23%31%
Farmland
11%11%
Wetland
3%5%
Barren
2%0.6%
Open water
2%3%
Grassland and shrub
1%0.9%
From 1,312 records placed within 100 m, beside all Ohio records placed the same way. People record where they go, so this shows where records come from, not where the species lives. Land cover: USGS Annual NLCD, 2025 (opens in a new tab)
Sources
Where these results come from
Records from iNaturalist research-grade observations and expert-identified GBIF datasets, CC0, CC BY and CC BY-NC. Sources
Seasons use the published method and its evidence thresholds. Methods
A spreadsheet (CSV) with a link to each record, on iNaturalist or GBIF. Records whose location was hidden by the observer or the source are counted but not linked.
