Garlic mustard
Alliaria petiolata (M.Bieb.) Cavara & Grande
Garlic mustard in all of Ohio- Kingdom
- Plantae
- Phylum
- Tracheophyta
- Class
- Magnoliopsida
- Order
- Capparales
- Family
- Brassicaceae
- Genus
- Alliaria
Introduced and invasive status
Invasive in Ohio: Ohio Department of Agriculture (opens in a new tab)
Also listed
- Introduced in Ohio: iNaturalist (opens in a new tab)
- 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.
Status: Simpson A, Sellers E, Pagad S (2023). United States Register of Introduced and Invasive Species (US-RIIS), ver. 2.0. U.S. Geological Survey, https://doi.org/10.5066/P9KFFTOD (opens in a new tab)
Range
Where it is recorded
Season shown in 1 of Ohio's 88 counties. Explore Ohio
- No result yet (6)
- Recorded, too few records for a result (52)
- Recorded, season not shown (29)
- Season shown (1)
Counties as a table
| County | Records |
|---|---|
| Adams County | Recorded, too few records for a result |
| Allen County | 34 · Recorded, season not shown |
| Ashland County | 25 · Recorded, season not shown |
| Ashtabula County | Recorded, too few records for a result |
| Athens County | 375 · 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 | 138 · Recorded, season not shown |
| Carroll County | Recorded, too few records for a result |
| Champaign County | Recorded, too few records for a result |
| Clark County | 29 · Recorded, season not shown |
| Clermont County | 75 · Recorded, season not shown |
| Clinton County | Recorded, too few records for a result |
| Columbiana County | 26 · Recorded, season not shown |
| Coshocton County | Recorded, too few records for a result |
| Crawford County | Recorded, too few records for a result |
| Cuyahoga County | 222 · Recorded, season not shown |
| Darke County | Recorded, too few records for a result |
| Defiance County | No qualifying records yet |
| Delaware County | 75 · Recorded, season not shown |
| Erie County | 68 · Recorded, season not shown |
| Fairfield County | 26 · Recorded, season not shown |
| Fayette County | Recorded, too few records for a result |
| Franklin County | 290 · 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 · Season shown |
| Greene County | 71 · Recorded, season not shown |
| Guernsey County | Recorded, too few records for a result |
| Hamilton County | 328 · 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 | 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 | 55 · Recorded, season not shown |
| Lawrence County | Recorded, too few records for a result |
| Licking County | 49 · Recorded, season not shown |
| Logan County | Recorded, too few records for a result |
| Lorain County | 64 · Recorded, season not shown |
| Lucas County | 56 · Recorded, season not shown |
| Madison County | Recorded, too few records for a result |
| Mahoning County | 32 · Recorded, season not shown |
| Marion County | Recorded, too few records for a result |
| Medina County | 33 · Recorded, season not shown |
| 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 | 77 · 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 | 24 · 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 | No qualifying records yet |
| Portage County | 44 · 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 | 86 · Recorded, season not shown |
| Summit County | 250 · 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 | 53 · Recorded, season not shown |
| Washington County | Recorded, too few records for a result |
| Wayne County | 29 · Recorded, season not shown |
| Williams County | Recorded, too few records for a result |
| Wood County | 57 · 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 Mahoning County
Not enough evidence
Records per week from 32 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
| Week | Records of garlic mustard | Years recorded | Records of all species |
|---|---|---|---|
| Jan 4–10 | 0 | 0 | 9 |
| Jan 11–17 | 0 | 0 | 27 |
| Jan 18–24 | 0 | 0 | 19 |
| Jan 25–31 | 0 | 0 | 32 |
| Feb 1–7 | 0 | 0 | 44 |
| Feb 8–14 | 0 | 0 | 28 |
| Feb 15–21 | 0 | 0 | 17 |
| Feb 22–28 | 0 | 0 | 63 |
| Mar 1–7 | 0 | 0 | 46 |
| Mar 8–14 | 0 | 0 | 28 |
| Mar 15–21 | 0 | 0 | 36 |
| Mar 22–28 | 0 | 0 | 27 |
| Mar 29 – Apr 4 | 0 | 0 | 45 |
| Apr 5–11 | 1 | 1 | 77 |
| Apr 12–18 | 2 | 2 | 163 |
| Apr 19–25 | 0 | 0 | 108 |
| Apr 26 – May 2 | 5 | 4 | 286 |
| May 3–9 | 0 | 0 | 203 |
| May 10–16 | 9 | 4 | 299 |
| May 17–23 | 5 | 4 | 643 |
| May 24–30 | 6 | 3 | 702 |
| May 31 – Jun 6 | 1 | 1 | 250 |
| Jun 7–13 | 0 | 0 | 226 |
| Jun 14–20 | 0 | 0 | 308 |
| Jun 21–27 | 0 | 0 | 249 |
| Jun 28 – Jul 4 | 1 | 1 | 259 |
| Jul 5–11 | 0 | 0 | 310 |
| Jul 12–18 | 0 | 0 | 308 |
| Jul 19–25 | 1 | 1 | 212 |
| Jul 26 – Aug 1 | 0 | 0 | 310 |
| Aug 2–8 | 0 | 0 | 242 |
| Aug 9–15 | 0 | 0 | 315 |
| Aug 16–22 | 0 | 0 | 345 |
| Aug 23–29 | 0 | 0 | 247 |
| Aug 30 – Sep 5 | 0 | 0 | 331 |
| Sep 6–12 | 1 | 1 | 241 |
| Sep 13–19 | 0 | 0 | 175 |
| Sep 20–26 | 0 | 0 | 181 |
| Sep 27 – Oct 3 | 0 | 0 | 169 |
| Oct 4–10 | 0 | 0 | 124 |
| Oct 11–17 | 0 | 0 | 87 |
| Oct 18–24 | 0 | 0 | 110 |
| Oct 25–31 | 0 | 0 | 50 |
| Nov 1–7 | 0 | 0 | 38 |
| Nov 8–14 | 0 | 0 | 31 |
| Nov 15–21 | 0 | 0 | 26 |
| Nov 22–28 | 0 | 0 | 18 |
| Nov 29 – Dec 5 | 0 | 0 | 51 |
| Dec 6–12 | 0 | 0 | 7 |
| Dec 13–19 | 0 | 0 | 10 |
| Dec 20–26 | 0 | 0 | 235 |
| Dec 27 – Jan 2 | 0 | 0 | 41 |
Reported in flower
Only 5 records here show flowers, too few to show a flowering season. One needs at least 20 records from 5 different years.
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
Not enough evidence
Records per week from 3,888 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
| Week | Records of garlic mustard | Years recorded | Records of all species |
|---|---|---|---|
| Jan 4–10 | 4 | 4 | 6,211 |
| Jan 11–17 | 5 | 4 | 5,146 |
| Jan 18–24 | 3 | 2 | 4,645 |
| Jan 25–31 | 6 | 3 | 4,698 |
| Feb 1–7 | 12 | 5 | 6,023 |
| Feb 8–14 | 14 | 5 | 5,888 |
| Feb 15–21 | 9 | 4 | 5,436 |
| Feb 22–28 | 11 | 7 | 6,846 |
| Mar 1–7 | 15 | 7 | 8,321 |
| Mar 8–14 | 21 | 5 | 10,384 |
| Mar 15–21 | 49 | 8 | 12,620 |
| Mar 22–28 | 84 | 9 | 13,949 |
| Mar 29 – Apr 4 | 152 | 10 | 19,661 |
| Apr 5–11 | 213 | 10 | 26,860 |
| Apr 12–18 | 371 | 10 | 39,925 |
| Apr 19–25 | 517 | 10 | 41,623 |
| Apr 26 – May 2 | 791 | 10 | 56,391 |
| May 3–9 | 463 | 10 | 52,952 |
| May 10–16 | 270 | 10 | 53,785 |
| May 17–23 | 226 | 10 | 57,698 |
| May 24–30 | 172 | 10 | 54,651 |
| May 31 – Jun 6 | 66 | 8 | 53,099 |
| Jun 7–13 | 47 | 9 | 53,700 |
| Jun 14–20 | 50 | 8 | 56,625 |
| Jun 21–27 | 30 | 8 | 55,361 |
| Jun 28 – Jul 4 | 28 | 6 | 58,477 |
| Jul 5–11 | 25 | 8 | 61,336 |
| Jul 12–18 | 8 | 5 | 64,722 |
| Jul 19–25 | 15 | 7 | 69,753 |
| Jul 26 – Aug 1 | 5 | 3 | 59,416 |
| Aug 2–8 | 9 | 3 | 59,712 |
| Aug 9–15 | 8 | 3 | 55,994 |
| Aug 16–22 | 3 | 2 | 54,328 |
| Aug 23–29 | 3 | 2 | 51,772 |
| Aug 30 – Sep 5 | 9 | 5 | 57,167 |
| Sep 6–12 | 4 | 2 | 59,075 |
| Sep 13–19 | 8 | 3 | 54,543 |
| Sep 20–26 | 7 | 4 | 45,860 |
| Sep 27 – Oct 3 | 8 | 3 | 43,180 |
| Oct 4–10 | 14 | 5 | 37,841 |
| Oct 11–17 | 19 | 3 | 30,824 |
| Oct 18–24 | 12 | 4 | 21,156 |
| Oct 25–31 | 16 | 5 | 19,021 |
| Nov 1–7 | 12 | 6 | 14,172 |
| Nov 8–14 | 14 | 7 | 12,621 |
| Nov 15–21 | 9 | 5 | 7,965 |
| Nov 22–28 | 14 | 7 | 8,136 |
| Nov 29 – Dec 5 | 7 | 4 | 6,083 |
| Dec 6–12 | 8 | 5 | 6,004 |
| Dec 13–19 | 5 | 2 | 5,423 |
| Dec 20–26 | 4 | 2 | 5,661 |
| Dec 27 – Jan 2 | 13 | 7 | 8,459 |
Reported in flower
Usually reported in flower mid-April to mid-May, middle week Apr 26 – May 2.
From 284 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 fruiting season shown here. The weeks are still too uncertain to show a season.
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
Often confused with
- ground-ivy Glechoma hederaceaOften confused in Ohio: 40 identifications in Ohio named one where the other was meant
- red deadnettle Lamium purpureumOften confused in Ohio: 13 identifications in Ohio named one where the other was meant
- nipplewort Lapsana communis120 identifications worldwide named one where the other was meant
- Annual Honesty Lunaria annua98 identifications worldwide named one where the other was meant
- common motherwort Leonurus cardiaca64 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 | 47%49% |
| Forest | 46%31% |
| Farmland | 3%11% |
| Wetland | 3%5% |
| Grassland and shrub | 0.3%0.9% |
| Open water | 0.2%3% |
| Barren | 0.1%0.6% |
From 2,499 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
- See it on iNaturalist (opens in a new tab)OpenPhenology is independent and not affiliated with iNaturalist.
Records behind the Ohio result
3,888 records from 2 datasets.
- iNaturalist Research-grade Observations (opens in a new tab) · iNaturalist.org · 3,883 recordsiNaturalist contributors, iNaturalist (2026). iNaturalist Research-grade Observations. iNaturalist.org. Occurrence dataset https://doi.org/10.15468/ab3s5x accessed via GBIF.org on 2026-11-13.
- iNaturalist observations (opens in a new tab) · iNaturalist.org · 5 recordsiNaturalist. Available from https://www.inaturalist.org. Accessed 2026-11-13
To cite: the GBIF download doi:10.15468/dl.y2jkt8 (opens in a new tab).
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.