Other watercresses
Related species and hybrids require fruit characters; common names are unreliable.
Use the botanical sourceExtra care needed
Watercress.
Nasturtium officinale
Also found as Two-rowed watercress · Rorippa nasturtium-aquaticum
A freshwater mustard whose food use must be separated from the risks of wild water sources.
Sources checked 9 September 2026 · Specialist field review pending
Before any gathering or use
Wild watercress can carry liver flukes and contaminants. Clear water and rinsing do not establish safety.
Where it grows
Tracked records and known growing zone
- Verified records
- 12,240
- People who recorded it
- 6,389
- Most records (northern hemisphere)
- Mar–Jul
- Records span
- 1980–2026
| January | 346 |
|---|---|
| February | 404 |
| March | 838 |
| April | 1980 |
| May | 1953 |
| June | 1526 |
| July | 890 |
| August | 712 |
| September | 636 |
| October | 546 |
| November | 422 |
| December | 395 |
| January | 104 |
|---|---|
| February | 74 |
| March | 89 |
| April | 169 |
| May | 81 |
| June | 75 |
| July | 63 |
| August | 99 |
| September | 205 |
| October | 277 |
| November | 233 |
| December | 123 |
Research-grade iNaturalist records, snapshot Aug 27, 2026. The growing zone combines areas where different people have repeatedly verified it. Records show where people looked and found it, not current abundance or permission to gather.
01 / Learn to see
Field marks
- 01
Once-pinnate leaves with rounded leaflets.
- 02
Small white four-petaled flowers.
- 03
Seed pods have seeds in two rows per chamber; related watercresses differ.
These are study prompts, not a complete identification key. Confirm the full plant with a regional flora and an experienced local identifier.
02 / Resolve the differences
Look closely. Compare.
Selected comparisons only. Other lookalikes may occur locally.
03 / Meet the place
Habitat & season
Range context
European origin and introduced in North America; consult local floras elsewhere.
Watch the plant stage
Learn flowering and fruiting plants; a green patch in flowing water is not evidence of safety.
Stage guidance is not a local forecast. Check your climate, elevation and a regional source; no month-shift formula is used here.
04 / Gather with care
Documented use & care
Parts discussed: Leafy shoot
Choose food-grown watercress from a controlled source rather than raw wild aquatic plants.
Care for the patch
Avoid disturbing watercourses; never divert or enter unsafe water to gather.
Preparation & storage essentials05 / Follow the evidence
Sources & review
- Native Plant Trust · WatercressBotanical description, range and documented use
- CDC · Liver flukesFasciola transmission through raw freshwater plants
Checked 9 September 2026. Original editorial synthesis; source institutions have not reviewed or endorsed this guide. Independent botanical field review is pending. Photos illustrate specimens; they do not certify the identity of a plant you find.
Suggest a correction