Introduced and assessed as invasive in the lower 48 states
Ohio law lists it as an invasive plant: not native to Ohio, and causing, or likely to cause, economic, environmental or human health harm.
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 7 of Ohio's 88 counties. Explore Ohio
No result yet (9)
Recorded, too few records for a result (49)
Recorded, season not shown (23)
Season shown (7)
Boundaries: U.S. Census Bureau, 2025 Cartographic Boundary Files, 1:500,000. Show as a table
Counties as a table
dame's rocket 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
23 · Recorded, season not shown
Ashtabula County
Recorded, too few records for a result
Athens County
58 · Recorded, season not shown
Auglaize County
Recorded, too few records for a result
Belmont County
Recorded, too few records for a result
Brown County
No qualifying records yet
Butler County
79 · Recorded, season not shown
Carroll County
Recorded, too few records for a result
Champaign County
Recorded, too few records for a result
Clark County
21 · Recorded, season not shown
Clermont County
56 · Season shown
Clinton County
Recorded, too few records for a result
Columbiana County
22 · Recorded, season not shown
Coshocton County
Recorded, too few records for a result
Crawford County
Recorded, too few records for a result
Cuyahoga County
227 · Recorded, season not shown
Darke County
Recorded, too few records for a result
Defiance County
Recorded, too few records for a result
Delaware County
93 · Season shown
Erie County
41 · Recorded, season not shown
Fairfield County
27 · Recorded, season not shown
Fayette County
Recorded, too few records for a result
Franklin County
226 · Season shown
Fulton County
No qualifying records yet
Gallia County
Recorded, too few records for a result
Geauga County
24 · Recorded, season not shown
Greene County
96 · Recorded, season not shown
Guernsey County
Recorded, too few records for a result
Hamilton County
27 · Recorded, season not shown
Hancock County
23 · Recorded, season not shown
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
42 · Recorded, season not shown
Lake County
46 · Recorded, season not shown
Lawrence County
No qualifying records yet
Licking County
73 · Recorded, season not shown
Logan County
Recorded, too few records for a result
Lorain County
91 · Season shown
Lucas County
122 · Recorded, season not shown
Madison County
Recorded, too few records for a result
Mahoning County
82 · Recorded, season not shown
Marion County
Recorded, too few records for a result
Medina County
36 · 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
Recorded, too few records for a result
Montgomery County
32 · 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
21 · Season 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
44 · Recorded, season not shown
Preble County
Recorded, too few records for a result
Putnam County
No qualifying records yet
Richland County
20 · Season shown
Ross County
Recorded, too few records for a result
Sandusky County
Recorded, too few records for a result
Scioto County
No qualifying records yet
Seneca County
Recorded, too few records for a result
Shelby County
No qualifying records yet
Stark County
110 · Recorded, season not shown
Summit County
382 · 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
No qualifying records yet
Vinton County
No qualifying records yet
Warren County
Recorded, too few records for a result
Washington County
Recorded, too few records for a result
Wayne County
36 · Recorded, season not shown
Williams County
Recorded, too few records for a result
Wood County
48 · 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 Summit County
Late April to late June, middle week May 24–30
Middle week · May 24–30
This week · Nov 8–14
JanFebMarAprMayJunJulAugSepOctNovDec
Show over the bars
Recording in Summit County · records of all species each week, 106,876 in all
Records per week from 382 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 210 dates. Latest record: August 2025.
Show as a table
Records of dame's rocket in Summit County each week, and records of all species
Week
Records of dame's rocket
Years recorded
Records of all species
Jan 4–10
0
0
711
Jan 11–17
0
0
665
Jan 18–24
0
0
601
Jan 25–31
0
0
526
Feb 1–7
0
0
608
Feb 8–14
0
0
619
Feb 15–21
0
0
629
Feb 22–28
0
0
748
Mar 1–7
0
0
728
Mar 8–14
0
0
852
Mar 15–21
0
0
1,055
Mar 22–28
1
1
1,007
Mar 29 – Apr 4
3
3
1,005
Apr 5–11
4
3
1,654
Apr 12–18
3
2
2,454
Apr 19–25
3
1
2,699
Apr 26 – May 2
7
5
3,970
May 3–9
8
2
3,569
May 10–16
29
6
4,053
May 17–23
90
10
3,509
May 24–30
119
10
4,045
May 31 – Jun 6
51
9
2,874
Jun 7–13
23
9
3,158
Jun 14–20
12
4
3,796
Jun 21–27
12
5
3,501
Jun 28 – Jul 4
6
4
3,968
Jul 5–11
1
1
3,632
Jul 12–18
2
2
4,051
Jul 19–25
0
0
3,855
Jul 26 – Aug 1
1
1
2,908
Aug 2–8
2
1
3,828
Aug 9–15
2
2
3,583
Aug 16–22
0
0
3,535
Aug 23–29
0
0
2,939
Aug 30 – Sep 5
0
0
2,840
Sep 6–12
0
0
2,758
Sep 13–19
0
0
2,761
Sep 20–26
0
0
2,646
Sep 27 – Oct 3
0
0
2,089
Oct 4–10
1
1
2,317
Oct 11–17
0
0
1,944
Oct 18–24
1
1
1,314
Oct 25–31
0
0
1,272
Nov 1–7
0
0
786
Nov 8–14
0
0
761
Nov 15–21
0
0
654
Nov 22–28
0
0
703
Nov 29 – Dec 5
1
1
503
Dec 6–12
0
0
447
Dec 13–19
0
0
496
Dec 20–26
0
0
522
Dec 27 – Jan 2
0
0
728
Reported in flower
No flowering season shown here. The weeks are still too uncertain to show a season.
Reported in fruit
Only 1 records here show fruit, too few to show a fruiting season. One needs at least 20 records from 5 different years.
In Ohio
Mid-April to late June, middle week May 17–23
Middle week · May 17–23
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 3,267 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 757 dates. Latest record: November 2025.
Show as a table
Records of dame's rocket in Ohio each week, and records of all species
Week
Records of dame's rocket
Years recorded
Records of all species
Jan 4–10
5
3
6,211
Jan 11–17
1
1
5,146
Jan 18–24
0
0
4,645
Jan 25–31
0
0
4,698
Feb 1–7
2
2
6,023
Feb 8–14
6
3
5,888
Feb 15–21
5
4
5,436
Feb 22–28
4
4
6,846
Mar 1–7
10
3
8,321
Mar 8–14
6
5
10,384
Mar 15–21
11
4
12,620
Mar 22–28
14
7
13,949
Mar 29 – Apr 4
25
6
19,661
Apr 5–11
38
7
26,860
Apr 12–18
42
8
39,925
Apr 19–25
37
6
41,623
Apr 26 – May 2
100
10
56,391
May 3–9
213
10
52,952
May 10–16
455
10
53,785
May 17–23
686
10
57,698
May 24–30
675
10
54,651
May 31 – Jun 6
368
10
53,099
Jun 7–13
150
9
53,700
Jun 14–20
132
9
56,625
Jun 21–27
94
9
55,361
Jun 28 – Jul 4
38
9
58,477
Jul 5–11
23
5
61,336
Jul 12–18
17
7
64,722
Jul 19–25
16
8
69,753
Jul 26 – Aug 1
14
7
59,416
Aug 2–8
11
5
59,712
Aug 9–15
10
6
55,994
Aug 16–22
8
4
54,328
Aug 23–29
5
3
51,772
Aug 30 – Sep 5
4
3
57,167
Sep 6–12
3
3
59,075
Sep 13–19
4
2
54,543
Sep 20–26
2
2
45,860
Sep 27 – Oct 3
1
1
43,180
Oct 4–10
5
3
37,841
Oct 11–17
2
2
30,824
Oct 18–24
2
2
21,156
Oct 25–31
4
3
19,021
Nov 1–7
4
1
14,172
Nov 8–14
2
2
12,621
Nov 15–21
2
2
7,965
Nov 22–28
3
2
8,136
Nov 29 – Dec 5
2
1
6,083
Dec 6–12
4
3
6,004
Dec 13–19
0
0
5,423
Dec 20–26
0
0
5,661
Dec 27 – Jan 2
2
2
8,459
Reported in flower
No flowering season shown here. The weeks are still too uncertain to show a season.
Reported in fruit
Only 15 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.
fall phloxPhlox paniculataOften confused in Ohio: 52 identifications in Ohio named one where the other was meant
Annual HonestyLunaria annuaOften confused in Ohio: 38 identifications in Ohio named one where the other was meant
wild sweetwilliamPhlox maculataOften confused in Ohio: 18 identifications in Ohio named one where the other was meant
Purple RocketIodanthus pinnatifidusOften confused in Ohio: 16 identifications in Ohio 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
Forest
42%31%
Developed
40%49%
Wetland
9%5%
Farmland
8%11%
Open water
1%3%
Grassland and shrub
0.9%0.9%
Barren
0.1%0.6%
From 2,051 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.
