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Diplotaxis muralis; photograph author not stated, no rights reserved CC0author not stated, no rights reserved · observed growing wild · 2026-09-25

Diplotaxis muralis (L.) DC.

Annual wall-rocket; Sand rocket; Stinkweed; Stinking wall rocket

Brassicaceae · Austria, Belgium +35

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Diplotaxis muralis, photograph author not stated, no rights reservedDiplotaxis muralis, photograph (c) Daniel Cahen, some rights reserved (CC BY)Diplotaxis muralis, photograph (c) Daniel Cahen, some rights reserved (CC BY)Diplotaxis muralis, photograph (c) Daniel Cahen, some rights reserved (CC BY)Diplotaxis muralis, photograph author not stated, no rights reservedDiplotaxis muralis, photograph author not stated, no rights reserved 64 photographs ›
Habitat figures
Cold floor (1 night in 100)
-8.2°C
Record low -19.8 °C in 44 years, at a typical spot in the range NASA POWER
Warmest month, mean daily high
23°C
Jul at the habitat CHELSA
Rain a year (median across the range)
844mm
12 months of 25 mm or more in the median year CHELSA
Open-sky light
5–36DLI
Lowest to highest month (DLI) CHELSA
The year in your months, northern hemisphere
  1. Jan
  2. Feb
  3. Mar
  4. Apr
  5. May
  6. Jun
  7. Jul
  8. Aug
  9. Sep
  10. Oct
  11. Nov
  12. Dec
Rain spread: 70% of the median year's rain takes 8 months, so no short rainy season. rain rule, CHELSA
Northern hemisphere unless you set your site. The chart is in the habitat's months.

Summary

Diplotaxis muralis, the annual wall-rocket, is a species of flowering plant in the family Brassicaceae. This plant is native to Europe, Asia, and Africa, but it is found throughout the temperate world, where it has naturalized. This is an erect mustard-like plant rarely reaching half a meter in height. It has lobed leaves and its stems are topped with dense inflorescences of yellow, or occasionally light purple, flowers with small oval petals and large anthers. More on Wikipedia ›

Quoted from Wikipedia, "Diplotaxis muralis", CC BY-SA 4.0.

Cultivation

Seasons

The rain rule reads no short rainy season: 70% of the median year's rain (599 mm of 832 mm) takes 8 months, June to January. Mean temperature moves 15.1 °C between the warmest and coldest month. Months are the habitat's, northern hemisphere; shifted six months for a southern-hemisphere collection: December to July.

Rain

832 mm in the median year at the habitat, 599 mm of it June to January. Wettest month October at 83 mm, driest month April at 52 mm. Across the grid cells of the range the year's total runs 598 mm to 1,186 mm, the 10th to 90th percentile of each cell's own year. The median of the cells' own yearly totals, 844 mm, is the year's rain at the top of the page; the 832 mm here is the median year's, the twelve monthly medians added, which the rain rule reads. Habitat calendar, northern hemisphere; median year across the grid cells of the range, CHELSA.

Light

Open sky over the habitat: 5 to 36 mol/m²/day across the year (daily light integral, median year across the grid cells of the range, CHELSA; the lowest 10th-percentile month across the cells is 4, the highest 90th-percentile month 44).

Warmth and air
Temperature

Coldest: the 1st-percentile night over 44 years at a typical spot in the range is -8.2 °C, the absolute minimum -19.8 °C, 2,570 frost nights in 44 years, 58.4 a year (NASA POWER daily minima). Warmest: the 99th-percentile day is 29.7 °C. Monthly means: the coldest month's mean nightly low 0.7 °C in January and February (across the grid cells of the range -3.8 °C to 4.8 °C), the warmest month's mean daily high 22.5 °C in July (median year across the grid cells of the range, CHELSA). Cold floor: -8.2 °C, which is the 1st-percentile night over 44 years at a typical spot in the range (NASA POWER).

Humidity

Relative humidity at the habitat: 59 to 67% across the year (monthly means, median year across the grid cells of the range, CHELSA). A figure about the air, saying nothing about how the plant takes water.

How this section is made

Each card states this species' habitat figures with their sources, and what two fixed rules read from them; nothing here says what the plant does, wants or tolerates. The rules · the terms.

Seasons. Read from the median year of CHELSA monthly rainfall and mean temperature across the grid cells of the range: the rain rule takes the smallest set of months carrying 70% of the rain and calls it winter when its mean is more than half a degree below the year's, summer when more than that above, and neither in between; the temperature rule, used only under 120 mm, names the cooler six months when they are at least a degree cooler than the other six. Months are shifted for the other hemisphere only where the temperature curve moves 4 °C or more and the habitat lies 10° or more from the equator. A reading of the curves, not an observation of the plant.

Rain. CHELSA monthly precipitation, median year across the grid cells of the range. The rain that falls where the species is recorded; nothing about how the plant takes water.

Light. CHELSA shortwave radiation at each envelope cell, a daily-mean flux taken to a daily total and converted at 2.07 mol of PAR per MJ. The sky over the habitat, measured; what reaches a plant under a rock, a shrub or a shade cloth is not.

Temperature. NASA POWER daily minima and maxima over 44 years at a typical spot in the range, lapse-corrected -34 m to its elevation; CHELSA monthly means, median year across the grid cells of the range. The cold floor is the 1st-percentile night named in its sentence. Not a measured survival limit for any plant in a pot.

Humidity. CHELSA relative humidity, median year across the grid cells of the range.

Climate across the habitat

Habitat months, northern hemisphere

Habitat climate of Diplotaxis muralis through the yearWarmest month July, mean daily high 23 °C; coldest months January and February, mean nightly low 0.7 °C; 832 mm of rain in the median year (the twelve monthly medians added). Medians across the range, from CHELSA; the extremes at the edge from NASA POWER. Habitat months, northern hemisphere.-30°-20°-10°0°10°20°30°40°frost29.7° 99th-percentile day, NASA POWER-19.8° lowest night in 44 years, NASA POWER°C · day and nightcold quarter0255075100125mm rainDLI 5–36RH 59–67%JanFebMarAprMayJunJulAugSepOctNovDec
day night rain medians and 10th–90th percentile across 598 habitat cells, CHELSA cold quarter: the three months around the coldest month's mean nightly low extremes over 44 years at a typical spot in the range, from NASA POWER, marked at the edge, in no month DLI, mol/m²/dayRH %each on its own scale
Figures by month
JanFebMarAprMayJunJulAugSepOctNovDec
Day °C6 / 2–107 / 4–1110 / 7–1413 / 11–1618 / 14–2020 / 17–2423 / 19–2722 / 19–2719 / 17–2315 / 13–1810 / 7–136 / 3–10
Night °C1 / -4–51 / -3–43 / 0–65 / 3–79 / 8–1112 / 11–1414 / 13–1714 / 13–1712 / 10–149 / 6–114 / 1–82 / -2–6
Rain mm69 / 41–9955 / 34–8261 / 40–8952 / 39–9165 / 55–11070 / 47–10673 / 35–10571 / 46–10273 / 51–11083 / 43–12380 / 49–11380 / 48–116
DLI6 / 5–1311 / 9–1918 / 17–2828 / 27–3434 / 32–3936 / 33–4335 / 32–4430 / 27–3821 / 18–2913 / 11–207 / 6–145 / 4–11
RH %67 / 60–6864 / 59–6662 / 57–6460 / 57–6260 / 57–6260 / 57–6359 / 56–6360 / 57–6362 / 58–6364 / 60–6566 / 61–6867 / 60–70
How this section is made
Each figure is the median across the 598 grid cells on land that hold in-range records (637 records in those cells; 39 more cells hold records but no land by the elevation layer, so those records sit at sea and the cells are left out), with the 10th–90th percentile span across those cells after the slash where it differs. A dash is a month one or more of those cells has no figure for in the grid (a variable CHELSA does not carry there), so no median is taken rather than one over fewer cells. Extremes and elevation were read at a typical spot in the range, cell 779:3699 (51.025, 4.975). Over 44 years there: absolute minimum -19.8 °C, 1st-percentile night -8.2 °C, 99th-percentile day 29.7 °C. Normals: CHELSA V2.1 1981–2010 climatology, 0.05° cells (each the mean of ~36 1 km pixels). Across the range: median and 10th–90th percentile of each month across the 598 distinct grid cells holding 637 of the 677 in-range records (39 further cells with records at sea, by the elevation layer, left out); extremes and elevation at the typical cell 779:3699 (its coldest month's mean nightly low nearest the median across cells); its position is the cell centre. Extremes: NASA POWER (MERRA-2) daily 1981–2024, cell 51.00_5.000, lapse-corrected -34 m at 6.5 °C/km. Elevation: ETOPO 2022, 20 m (cell mean).

Natural habitat

Native range as published by WCVP; the marker is where the records are densest and decides nothing: the climate was read across the cells of the in-range records placed well enough to read one, not at the marker.
Openly licensed records inside the range, framed on where they fall.
NativeAustria, Belgium, Czechoslovakia, Germany, Hungary, Netherlands, Poland, Switzerland, Baleares, Corse, France, Portugal, Sardegna, Spain, Albania, Bulgaria, Greece, Italy, Romania, Sicilia, Turkey-in-Europe, Yugoslavia, Krym, Ukraine, Algeria, Egypt, Libya, Morocco, Tunisia, Canary Is., North Caucasus, Transcaucasus, New South Wales, South Australia, Tasmania, Victoria, Western Australia · introduced: Denmark, Great Britain, Ireland, Norway, Sweden, Belarus, Baltic States, Central European Russia, Azores, Cape Provinces, Free State, Northern Provinces, Kazakhstan, Uzbekistan, Manchuria, Korea, West Himalaya, New Zealand North, New Zealand South, New Caledonia, Alberta, Saskatchewan, New Brunswick, Nova Scotia, Ontario, Prince Edward I., Québec, Colorado, Montana, Oregon, Illinois, Iowa, Kansas, Minnesota, Nebraska, Wisconsin, Connecticut, Indiana, Massachusetts, Michigan, New Jersey, New York, Ohio, Pennsylvania, Arizona, California, Utah, New Mexico, Texas, Alabama, Arkansas, Florida, Mexico Northeast, Mexico Northwest, Bahamas, Bermuda, Dominican Republic, Haiti, Bolivia, Ecuador, Peru, Argentina Northeast, Argentina South, Argentina Northwest, Chile Central, Chile North · regions are the level-3 units of the World Geographical Scheme for Recording Plant Distributions, as Kew's World Checklist records ranges, some under historical names such as Yugoslavia or Czechoslovakia (how).
Map marker51.314, 4.333 · in the densest population, 168 records (21% of those in range)
Kew's description“annual or subshrub” · “temperate” · quoted from WCVP, RBG Kew (CC BY 4.0); not derived here
Evidence usedThe map marker rests on all 787 georeferenced records inside the native range; the climate across the range on the 637 of them in the land cells it reads, of 677 placed to within 10 km; the map shows only the 439 openly licensed ones, which alone would put the marker 82 km away. 616 records outside the WCVP native range not used. 110 in-range records are placed to worse than 10 km, or with no stated accuracy (admitted only as a person's observation to three decimals), and stay on the map but off the climate.
How this section is made
The map marker: the openly licensed record nearest the middle of the densest 1° population of the 787 in-range records; it decides nothing. Records outside the native range, living specimens and records marked introduced are not used; which records count.

Photographs

Diplotaxis muralis, photograph 1did not loadDiplotaxis muralis, photograph 2did not loadDiplotaxis muralis, photograph 3did not loadDiplotaxis muralis, photograph 4did not loadDiplotaxis muralis, photograph 5did not loadDiplotaxis muralis, photograph 6did not load

Photographs: author not stated, no rights reserved · CC0 (3); (c) Daniel Cahen, some rights reserved (CC BY) (3).

Similar habitat climate The 6 nearest by mean daily high, mean nightly low and rain, month by month. How.

Diplotaxis tenuifolia Diplotaxis tenuifolia Perennial wall-rocket Photo: CC0, author not statedPseudognaphalium luteoalbum Pseudognaphalium luteoalbum Asteraceae Photo: CC BY-SA, MuscariPopulus × canescens Populus × canescens Gray poplar Photo: CC0, author not statedSinapis alba Sinapis alba White mustard Photo: CC BY, zebedeugalinhaTrifolium pratense Trifolium pratense Red clover Photo: CC BY, Tom NortonPapaver dubium Papaver dubium Blindeyes Photo: CC BY, zebedeugalinha

Other Diplotaxis 4 in the reference

Diplotaxis catholica Diplotaxis catholica Brassicaceae Photo: CC BY, Barry StewartDiplotaxis erucoides Diplotaxis erucoides White wall-rocket Photo: CC BY, Emily Nyenyedzi DaviesDiplotaxis ibicensis Diplotaxis ibicensis Brassicaceae Photo: CC BY, rainbowkittenDiplotaxis tenuifolia Diplotaxis tenuifolia Perennial wall-rocket Photo: CC0, author not stated

Names & registers

Also known as Brassica muralis; Diplotaxis intermedia; Diplotaxis littoralis; Diplotaxis mandonis; Diplotaxis muralis var. intermedia and 11 more. (GBIF Backbone)

GBIFPOWOIPNIWFOWikidataWikipediaiNaturalist

The record

Family
Brassicaceae
Described by
(L.) DC.
Native to
Austria, Belgium, Czechoslovakia +34
Wild records
787 in range · 439 open

Every figure here is derived from public data by a stated rule and names its source; nothing about this species is written for its page by a person or by AI, apart from the marked, credited quotations. How →

Where this page came from built 2026-10-22
GBIF species record gbif.species answeredasked 2026-10-22
GBIF synonyms gbif.synonyms answeredasked 2026-10-22
GBIF common names gbif.vernacular answeredasked 2026-10-22names fetched 2026-10-22
WCVP native range wcvp.distribution answeredas of 2026-06-04
GBIF occurrence records gbif.occurrences answeredas of 2026-10-21GBIF occurrence download https://doi.org/10.15468/dl.hbdw64, of 2026-10-21; 66 records within 1 km of a botanic garden, herbarium or zoo left out (44 at a botanic garden or arboretum, 2 at a herbarium, 20 at a zoo; Wikidata's list)
Habitat climate climate answeredasked 2026-10-22
Daily extremes (NASA POWER) climate.extremes answeredasked 2026-10-22NASA POWER (MERRA-2) daily 1981–2024, cell 51.00_5.000, lapse-corrected -34 m at 6.5 °C/km
Wikidata wikidata answeredasked 2026-10-22IPNI and POWO linked by Kew's number for Diplotaxis muralis (L.) DC. (the item's: IPNI 282204-1, POWO 96869-3)
Wikipedia wikipedia answeredasked 2026-10-22
iNaturalist photographs, wild inat.photos.wild answeredasked 2026-10-22from iNaturalist's open data of 2026-09-27: research-grade observations with an open-licence photograph, the 24 whose photographs iNaturalist received last (the open data holds no votes); filled 2026-10-22
iNaturalist photographs, cultivated inat.photos.cultivated not asked
GBIF media gbif.media answeredasked 2026-10-22
OpenAlex papers openalex not askednot yet asked for this reference; a later fill takes the papers from OpenAlex's snapshot

Every source is recorded as having answered, reported nothing, refused, failed, not been asked, or answered twice where one answer is taken (“not taken: two items answered”), and, for a source asked when this page was built, when: the figures are as the source held them that day; a source read from a file (Kew's World Checklist, a GBIF download) says "as of" the file's day instead; a row carried from an earlier build of the page names that build instead. Only “nothing to report” is ever shown as an absence. Records came from 168 datasets via GBIF.org; each carries its own licence.

Cultifolio

Opening your plants…