Introduced and assessed as invasive in the lower 48 states
Introduced in the lower 48 states (listed as Lamium purpureum var. purpureum)
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 5 of Ohio's 88 counties. Explore Ohio
No result yet (4)
Recorded, too few records for a result (57)
Recorded, season not shown (22)
Season shown (5)
Boundaries: U.S. Census Bureau, 2025 Cartographic Boundary Files, 1:500,000. Show as a table
Counties as a table
red deadnettle by Ohio county: records and mapped range
County
Records
Adams County
Recorded, too few records for a result
Allen County
28 · Recorded, season not shown
Ashland County
Recorded, too few records for a result
Ashtabula County
Recorded, too few records for a result
Athens County
275 · Season 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
108 · Recorded, season not shown
Carroll County
Recorded, too few records for a result
Champaign County
Recorded, too few records for a result
Clark County
35 · Recorded, season not shown
Clermont County
47 · Recorded, season not shown
Clinton County
Recorded, too few records for a result
Columbiana County
25 · Recorded, season not shown
Coshocton County
Recorded, too few records for a result
Crawford County
Recorded, too few records for a result
Cuyahoga County
126 · Season shown
Darke County
Recorded, too few records for a result
Defiance County
Recorded, too few records for a result
Delaware County
34 · Recorded, season not shown
Erie County
40 · Recorded, season not shown
Fairfield County
26 · Recorded, season not shown
Fayette County
Recorded, too few records for a result
Franklin County
240 · Recorded, season not shown
Fulton County
Recorded, too few records for a result
Gallia County
23 · Recorded, season not shown
Geauga County
20 · Season shown
Greene County
78 · Season shown
Guernsey County
Recorded, too few records for a result
Hamilton County
223 · Season 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
Recorded, too few records for a result
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
31 · Recorded, season not shown
Lawrence County
Recorded, too few records for a result
Licking County
41 · Recorded, season not shown
Logan County
Recorded, too few records for a result
Lorain County
47 · Recorded, season not shown
Lucas County
43 · 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
Recorded, too few records for a result
Montgomery County
94 · 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
No qualifying records yet
Ottawa County
Recorded, too few records for a result
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
47 · Recorded, season not shown
Preble County
Recorded, too few records for a result
Putnam County
No qualifying records yet
Richland County
23 · Recorded, season not shown
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
48 · Recorded, season not shown
Summit County
133 · 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
39 · Recorded, season not shown
Washington County
Recorded, too few records for a result
Wayne County
Recorded, too few records for a result
Williams County
Recorded, too few records for a result
Wood County
45 · 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 Erie County
Not enough evidence
Most records come from a single year, so a season is not shown yet. Based on 40 records in 7 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 Erie County · records of all species each week, 14,434 in all
Records per week from 40 records in 7 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 red deadnettle in Erie County each week, and records of all species
Week
Records of red deadnettle
Years recorded
Records of all species
Jan 4–10
0
0
47
Jan 11–17
0
0
75
Jan 18–24
0
0
52
Jan 25–31
0
0
67
Feb 1–7
0
0
70
Feb 8–14
0
0
21
Feb 15–21
0
0
52
Feb 22–28
0
0
60
Mar 1–7
1
1
90
Mar 8–14
0
0
90
Mar 15–21
0
0
79
Mar 22–28
0
0
93
Mar 29 – Apr 4
0
0
82
Apr 5–11
8
4
499
Apr 12–18
6
3
555
Apr 19–25
11
4
531
Apr 26 – May 2
8
2
590
May 3–9
5
3
519
May 10–16
0
0
765
May 17–23
0
0
697
May 24–30
0
0
548
May 31 – Jun 6
1
1
427
Jun 7–13
0
0
381
Jun 14–20
0
0
384
Jun 21–27
0
0
273
Jun 28 – Jul 4
0
0
316
Jul 5–11
0
0
605
Jul 12–18
0
0
329
Jul 19–25
0
0
514
Jul 26 – Aug 1
0
0
527
Aug 2–8
0
0
409
Aug 9–15
0
0
422
Aug 16–22
0
0
699
Aug 23–29
0
0
309
Aug 30 – Sep 5
0
0
440
Sep 6–12
0
0
392
Sep 13–19
0
0
444
Sep 20–26
0
0
398
Sep 27 – Oct 3
0
0
248
Oct 4–10
0
0
260
Oct 11–17
0
0
148
Oct 18–24
0
0
176
Oct 25–31
0
0
161
Nov 1–7
0
0
149
Nov 8–14
0
0
78
Nov 15–21
0
0
49
Nov 22–28
0
0
72
Nov 29 – Dec 5
0
0
71
Dec 6–12
0
0
27
Dec 13–19
0
0
29
Dec 20–26
0
0
54
Dec 27 – Jan 2
0
0
61
Reported in flower
Only 18 records here show flowers, too few to show a flowering season. 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
Not enough evidence
The weeks are still too uncertain to show a season. Based on 2,984 records in 10 of the 10 years from 2016 to 2025, above the minimum of 20 records from 5 different years.
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 2,984 records in 10 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 red deadnettle in Ohio each week, and records of all species
Week
Records of red deadnettle
Years recorded
Records of all species
Jan 4–10
2
2
6,211
Jan 11–17
8
3
5,146
Jan 18–24
0
0
4,645
Jan 25–31
7
4
4,698
Feb 1–7
6
3
6,023
Feb 8–14
7
2
5,888
Feb 15–21
9
4
5,436
Feb 22–28
9
3
6,846
Mar 1–7
24
5
8,321
Mar 8–14
45
7
10,384
Mar 15–21
82
8
12,620
Mar 22–28
117
7
13,949
Mar 29 – Apr 4
236
10
19,661
Apr 5–11
362
10
26,860
Apr 12–18
443
10
39,925
Apr 19–25
401
10
41,623
Apr 26 – May 2
520
10
56,391
May 3–9
310
9
52,952
May 10–16
131
9
53,785
May 17–23
93
9
57,698
May 24–30
34
9
54,651
May 31 – Jun 6
10
5
53,099
Jun 7–13
4
3
53,700
Jun 14–20
2
2
56,625
Jun 21–27
0
0
55,361
Jun 28 – Jul 4
1
1
58,477
Jul 5–11
0
0
61,336
Jul 12–18
1
1
64,722
Jul 19–25
0
0
69,753
Jul 26 – Aug 1
0
0
59,416
Aug 2–8
0
0
59,712
Aug 9–15
0
0
55,994
Aug 16–22
1
1
54,328
Aug 23–29
1
1
51,772
Aug 30 – Sep 5
2
2
57,167
Sep 6–12
0
0
59,075
Sep 13–19
2
2
54,543
Sep 20–26
1
1
45,860
Sep 27 – Oct 3
3
2
43,180
Oct 4–10
8
5
37,841
Oct 11–17
7
5
30,824
Oct 18–24
6
4
21,156
Oct 25–31
10
5
19,021
Nov 1–7
6
5
14,172
Nov 8–14
10
5
12,621
Nov 15–21
11
5
7,965
Nov 22–28
10
6
8,136
Nov 29 – Dec 5
7
6
6,083
Dec 6–12
12
7
6,004
Dec 13–19
8
5
5,423
Dec 20–26
3
3
5,661
Dec 27 – Jan 2
12
5
8,459
Reported in flower
Usually reported in flower late March to early May, middle week Apr 19–25.
From 465 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
No records here show fruit yet, so there is no fruiting season to show. 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.
ground-ivyGlechoma hederaceaOften confused in Ohio: 42 identifications in Ohio named one where the other was meant
henbit deadnettleLamium amplexicauleOften confused in Ohio: 28 identifications in Ohio named one where the other was meant
Spotted deadnettleLamium maculatumOften confused in Ohio: 15 identifications in Ohio named one where the other was meant
garlic mustardAlliaria petiolataOften confused in Ohio: 13 identifications in Ohio named one where the other was meant
common selfhealPrunella vulgaris99 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
69%49%
Forest
17%31%
Farmland
11%11%
Wetland
2%5%
Open water
0.5%3%
Grassland and shrub
0.4%0.9%
Barren
0.2%0.6%
From 1,996 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)
Finer identifications
Some Ohio records of this species were identified to a variety:
Lamium purpureum var. purpureumCommon Purple Deadnettlevariety
Every one of these records counts toward red deadnettle's season above.
Why some records go further than species
Many plants vary from place to place. Botanists name these groups at three levels below species: subspecies, variety and form, from the broadest difference to the smallest. Observers and experts only identify a record that far when it shows enough detail to tell them apart. Records without that detail count at the species level.
Names: Catalogue of Life.
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.
