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 4 of Ohio's 88 counties. Explore Ohio
No result yet (4)
Recorded, too few records for a result (61)
Recorded, season not shown (19)
Season shown (4)
Boundaries: U.S. Census Bureau, 2025 Cartographic Boundary Files, 1:500,000. Show as a table
Counties as a table
Red Clover 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
231 · Recorded, season not shown
Auglaize County
No qualifying records yet
Belmont County
Recorded, too few records for a result
Brown County
Recorded, too few records for a result
Butler County
93 · 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
37 · 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
113 · Recorded, season not shown
Darke County
Recorded, too few records for a result
Defiance County
Recorded, too few records for a result
Delaware County
51 · Recorded, season not shown
Erie County
25 · Recorded, season not shown
Fairfield County
54 · Recorded, season not shown
Fayette County
Recorded, too few records for a result
Franklin County
190 · Recorded, season not shown
Fulton County
Recorded, too few records for a result
Gallia County
Recorded, too few records for a result
Geauga County
28 · Recorded, season not shown
Greene County
51 · Recorded, season not shown
Guernsey County
Recorded, too few records for a result
Hamilton County
129 · 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
Recorded, too few records for a result
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
33 · Recorded, season not shown
Lawrence County
Recorded, too few records for a result
Licking County
52 · Recorded, season not shown
Logan County
Recorded, too few records for a result
Lorain County
48 · Recorded, season not shown
Lucas County
108 · 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
31 · Recorded, season not shown
Meigs County
Recorded, too few records for a result
Mercer County
Recorded, too few records for a result
Miami County
Recorded, too few records for a result
Monroe County
No qualifying records yet
Montgomery County
100 · 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
Recorded, too few records for a result
Paulding County
No qualifying records yet
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
37 · Recorded, season not shown
Preble County
Recorded, too few records for a result
Putnam County
Recorded, too few records for a result
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
38 · Recorded, season not shown
Summit County
177 · Season 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
Recorded, too few records for a result
Vinton County
Recorded, too few records for a result
Warren County
60 · Recorded, season not shown
Washington County
Recorded, too few records for a result
Wayne County
26 · Season shown
Williams County
Recorded, too few records for a result
Wood County
71 · Season shown
Wyandot County
No qualifying records yet
No mapped range from the range source used, the USGS Gap Analysis Project, which maps land vertebrates only.
Season
When it is recorded
In Lake County
Not enough evidence
The weeks are still too uncertain to show a season. Based on 33 records in 9 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 Lake County · records of all species each week, 29,200 in all
Records per week from 33 records in 9 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 Clover in Lake County each week, and records of all species
Week
Records of Red Clover
Years recorded
Records of all species
Jan 4–10
0
0
54
Jan 11–17
0
0
37
Jan 18–24
0
0
52
Jan 25–31
0
0
82
Feb 1–7
0
0
58
Feb 8–14
0
0
89
Feb 15–21
0
0
51
Feb 22–28
0
0
54
Mar 1–7
0
0
51
Mar 8–14
0
0
155
Mar 15–21
0
0
190
Mar 22–28
0
0
166
Mar 29 – Apr 4
0
0
234
Apr 5–11
0
0
425
Apr 12–18
0
0
525
Apr 19–25
0
0
522
Apr 26 – May 2
1
1
844
May 3–9
1
1
1,247
May 10–16
0
0
647
May 17–23
0
0
950
May 24–30
2
2
1,067
May 31 – Jun 6
4
3
1,073
Jun 7–13
4
4
1,320
Jun 14–20
3
3
1,088
Jun 21–27
3
2
1,052
Jun 28 – Jul 4
2
2
1,305
Jul 5–11
1
1
1,359
Jul 12–18
4
3
1,171
Jul 19–25
1
1
1,056
Jul 26 – Aug 1
0
0
1,193
Aug 2–8
0
0
1,090
Aug 9–15
1
1
745
Aug 16–22
0
0
1,084
Aug 23–29
0
0
847
Aug 30 – Sep 5
1
1
699
Sep 6–12
1
1
858
Sep 13–19
0
0
714
Sep 20–26
1
1
739
Sep 27 – Oct 3
0
0
731
Oct 4–10
0
0
723
Oct 11–17
2
2
475
Oct 18–24
0
0
425
Oct 25–31
1
1
371
Nov 1–7
0
0
271
Nov 8–14
0
0
271
Nov 15–21
0
0
197
Nov 22–28
0
0
182
Nov 29 – Dec 5
0
0
81
Dec 6–12
0
0
111
Dec 13–19
0
0
84
Dec 20–26
0
0
96
Dec 27 – Jan 2
0
0
289
Reported in flower
Only 2 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
Mid-April to late July, middle week early June, and again early August to early November, middle week mid-September
Recorded in two separate seasons, each shown with its own early, middle and late weeks.
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 2,752 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 Clover in Ohio each week, and records of all species
Week
Records of Red Clover
Years recorded
Records of all species
Jan 4–10
0
0
6,211
Jan 11–17
2
2
5,146
Jan 18–24
0
0
4,645
Jan 25–31
0
0
4,698
Feb 1–7
0
0
6,023
Feb 8–14
0
0
5,888
Feb 15–21
0
0
5,436
Feb 22–28
0
0
6,846
Mar 1–7
1
1
8,321
Mar 8–14
1
1
10,384
Mar 15–21
3
3
12,620
Mar 22–28
5
3
13,949
Mar 29 – Apr 4
10
5
19,661
Apr 5–11
16
6
26,860
Apr 12–18
22
6
39,925
Apr 19–25
32
7
41,623
Apr 26 – May 2
47
8
56,391
May 3–9
51
8
52,952
May 10–16
59
8
53,785
May 17–23
144
8
57,698
May 24–30
165
10
54,651
May 31 – Jun 6
160
10
53,099
Jun 7–13
155
10
53,700
Jun 14–20
135
10
56,625
Jun 21–27
109
10
55,361
Jun 28 – Jul 4
90
9
58,477
Jul 5–11
77
9
61,336
Jul 12–18
94
10
64,722
Jul 19–25
81
9
69,753
Jul 26 – Aug 1
71
10
59,416
Aug 2–8
55
9
59,712
Aug 9–15
60
9
55,994
Aug 16–22
75
10
54,328
Aug 23–29
64
8
51,772
Aug 30 – Sep 5
123
10
57,167
Sep 6–12
186
9
59,075
Sep 13–19
101
9
54,543
Sep 20–26
82
9
45,860
Sep 27 – Oct 3
132
9
43,180
Oct 4–10
100
8
37,841
Oct 11–17
95
9
30,824
Oct 18–24
45
10
21,156
Oct 25–31
30
8
19,021
Nov 1–7
34
7
14,172
Nov 8–14
24
9
12,621
Nov 15–21
6
4
7,965
Nov 22–28
4
4
8,136
Nov 29 – Dec 5
4
3
6,083
Dec 6–12
1
1
6,004
Dec 13–19
1
1
5,423
Dec 20–26
0
0
5,661
Dec 27 – Jan 2
0
0
8,459
Reported in flower
Usually reported in flower early May to early August, middle week mid-June, and again mid-August to early November, middle week early September.
Reported in fruit
Only 14 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.
white cloverTrifolium repensOften confused in Ohio: 51 identifications in Ohio named one where the other was meant
Alsike cloverTrifolium hybridumOften confused in Ohio: 35 identifications in Ohio named one where the other was meant
crimson cloverTrifolium incarnatum149 identifications worldwide named one where the other was meant
White SweetcloverMelilotus albus90 identifications worldwide named one where the other was meant
Black MedickMedicago lupulina77 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.
Months not reported
Jan: recorded
Feb: no record
Mar: recorded
Apr: recorded
May: recorded
Jun: recorded
Jul: recorded
Aug: recorded
Sep: recorded
Oct: recorded
Nov: recorded
Dec: recorded
Not reported in Ohio in February, 2016 to 2025.
Land cover where it is recorded
Land cover
Its recordsAll Ohio records
Developed
59%49%
Farmland
20%11%
Forest
19%31%
Wetland
1%5%
Grassland and shrub
0.5%0.9%
Open water
0.5%3%
Barren
0.2%0.6%
From 1,828 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.
