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Populus tremula; photograph (c) Мирослав Соболев, some rights reserved (CC BY) CC BY(c) Мирослав Соболев, some rights reserved (CC BY) · observed growing wild · 2026-07-12

Populus tremula L.

Aspen; European aspen; Eurasian Aspen; Poplar

Salicaceae · Denmark, Finland +58

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Populus tremula, photograph (c) Мирослав Соболев, some rights reserved (CC BY)Populus tremula, photograph (c) Мирослав Соболев, some rights reserved (CC BY)Populus tremula, photograph (c) Мирослав Соболев, some rights reserved (CC BY)Populus tremula, photograph (c) Cyndy Sims (Parr), some rights reserved (CC BY)Populus tremula, photograph (c) Artem Abdukakharov, some rights reserved (CC BY)Populus tremula, photograph author not stated, no rights reserved 55 photographs ›
Habitat figures
Cold floor (1 night in 100)
-16.9°C
Record low -26.7 °C in 44 years, at a typical spot in the range NASA POWER
Warmest month, mean daily high
22°C
Jul at the habitat CHELSA
Rain a year (median across the range)
787mm
12 months of 25 mm or more in the median year CHELSA
Open-sky light
2–35DLI
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

Populus tremula (commonly called aspen, common aspen, Eurasian aspen, European aspen, or quaking aspen) is a species of poplar native to cool temperate regions of the Old World.

Quoted from Wikipedia, "Populus tremula", CC BY-SA 4.0.

Cultivation

Seasons

The rain rule reads no short rainy season: 70% of the median year's rain (574 mm of 768 mm) takes 8 months, May to December. Mean temperature moves 19.5 °C between the warmest and coldest month. Months are the habitat's, northern hemisphere; shifted six months for a southern-hemisphere collection: November to June.

Rain

768 mm in the median year at the habitat, 574 mm of it May to December. Wettest month July at 83 mm, driest month February at 44 mm. Across the grid cells of the range the year's total runs 583 mm to 1,287 mm, the 10th to 90th percentile of each cell's own year. The median of the cells' own yearly totals, 787 mm, is the year's rain at the top of the page; the 768 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: 2 to 35 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 1, the highest 90th-percentile month 38).

Warmth and air
Temperature

Coldest: the 1st-percentile night over 44 years at a typical spot in the range is -16.9 °C, the absolute minimum -26.7 °C, 5,649 frost nights in 44 years, 128.4 a year (NASA POWER daily minima). Warmest: the 99th-percentile day is 27.5 °C. Monthly means: the coldest month's mean nightly low -5.0 °C in February (across the grid cells of the range -11.7 °C to 0.4 °C), the warmest month's mean daily high 21.5 °C in July (median year across the grid cells of the range, CHELSA). Cold floor: -16.9 °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: 58 to 69% 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 +14 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 Populus tremula through the yearWarmest month July, mean daily high 22 °C; coldest month February, mean nightly low -5.0 °C; 768 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°frost27.5° 99th-percentile day, NASA POWER-26.7° lowest night in 44 years, NASA POWER°C · day and nightcold quarter0255075100125150mm rainDLI 2–35RH 58–69%JanFebMarAprMayJunJulAugSepOctNovDec
day night rain medians and 10th–90th percentile across 501 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 °C0 / -6–51 / -6–64 / -1–1010 / 7–1416 / 12–1919 / 16–2222 / 19–2420 / 17–2315 / 13–1910 / 7–145 / -1–91 / -5–6
Night °C-5 / -12–0-5 / -12–0-2 / -7–32 / -1–57 / 4–911 / 9–1314 / 11–1513 / 11–159 / 7–115 / 2–80 / -5–4-4 / -10–1
Rain mm54 / 37–9844 / 31–7951 / 32–9345 / 33–8561 / 41–10376 / 59–11483 / 66–12282 / 59–13372 / 54–12272 / 50–13367 / 48–12661 / 44–103
DLI3 / 2–98 / 6–1516 / 14–2226 / 24–3034 / 32–3635 / 33–3834 / 32–3727 / 24–3118 / 15–239 / 7–154 / 3–92 / 1–7
RH %68 / 63–7366 / 61–7063 / 60–6559 / 57–6158 / 55–6159 / 57–6260 / 58–6261 / 58–6363 / 60–6565 / 62–6868 / 64–7169 / 64–72
How this section is made
Each figure is the median across the 501 grid cells on land that hold in-range records (663 records in those cells; 3 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 617:3936 (59.125, 16.825). Over 44 years there: absolute minimum -26.7 °C, 1st-percentile night -16.9 °C, 99th-percentile day 27.5 °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 501 distinct grid cells holding 663 of the 666 in-range records (3 further cells with records at sea, by the elevation layer, left out); extremes and elevation at the typical cell 617:3936 (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 59.00_16.875, lapse-corrected +14 m at 6.5 °C/km. Elevation: ETOPO 2022, 55 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.
NativeDenmark, Finland, Great Britain, Ireland, Norway, Sweden, Austria, Belgium, Czechoslovakia, Germany, Hungary, Netherlands, Poland, Switzerland, Corse, France, Portugal, Spain, Albania, Bulgaria, Greece, Italy, Romania, Turkey-in-Europe, Yugoslavia, Belarus, Baltic States, Central European Russia, East European Russia, North European Russia, South European Russia, Northwest European Russia, Ukraine, Algeria, Altay, Krasnoyarsk, West Siberia, Yakutskiya, Kamchatka, Kuril Is., Primorye, Kazakhstan, North Caucasus, Transcaucasus, East Aegean Is., Lebanon-Syria, Turkey, China South-Central, Inner Mongolia, Manchuria, China North-Central, Qinghai, China Southeast, Tibet, Xinjiang, Mongolia, Japan, Korea, East Himalaya, Myanmar · introduced: Tadzhikistan · 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 marker59.107, 16.795 · in the densest population, 272 records (41% of those in range)
Kew's description“tree” · “temperate” · quoted from WCVP, RBG Kew (CC BY 4.0); not derived here
Evidence usedThe map marker rests on all 671 georeferenced records inside the native range; the climate across the range on the 663 of them in the land cells it reads, of 666 placed to within 10 km; the map shows only the 393 openly licensed ones, which alone would put the marker 11 km away. 1 record outside the WCVP native range not used. 5 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 inside the densest 4° block of the 671 in-range records; it decides nothing. Records outside the native range, living specimens and records marked introduced are not used; which records count.

Photographs

Populus tremula, photograph 1did not loadPopulus tremula, photograph 2did not loadPopulus tremula, photograph 3did not loadPopulus tremula, photograph 4did not loadPopulus tremula, photograph 5did not loadPopulus tremula, photograph 6did not load

Photographs: (c) Мирослав Соболев, some rights reserved (CC BY) (3); (c) Cyndy Sims (Parr), some rights reserved (CC BY); (c) Artem Abdukakharov, some rights reserved (CC BY); author not stated, no rights reserved · CC0.

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

Luzula pilosa Luzula pilosa Hairy Wood-rush Photo: CC BY, Евгений МаринкинPoa compressa Poa compressa Flattened meadow-grass Photo: CC BY, Ondřej KřivanBidens tripartita Bidens tripartita Trifid bur-marigold Photo: CC0, author not statedTrifolium medium Trifolium medium Zigzag clover Photo: CC BY, Bobo-XPinus sylvestris Pinus sylvestris Scots pine Photo: CC BY, Сергей ГолубевVeronica verna Veronica verna Spring speedwell Photo: CC BY, Мирослав Соболев

Other Populus 32 in the reference

Populus × acuminata Populus × acuminata Lance-leaved cottonwood Photo: CC0, author not statedPopulus alba Populus alba White poplar Photo: CC BY, Sabarni SarkerPopulus angustifolia Populus angustifolia Mountain cottonwood Photo: CC BY, Daughter DadPopulus balsamifera Populus balsamifera Balsam poplar Photo: CC0, author not statedPopulus × berolinensis Populus × berolinensis Salicaceae Photo: CC BY, Urgamal MagsarPopulus brandegeei Populus brandegeei Brandegee Poplar Photo: CC BY, Abraham Sánchez RomeroPopulus × canescens Populus × canescens Gray poplar Photo: CC0, author not statedPopulus cathayana Populus cathayana Salicaceae Photo: CC BY, Jane CharlenPopulus ciliata Populus ciliata Himalayan Poplar Photo: CC BY, avephillPopulus deltoides Populus deltoides Necklace poplar Photo: CC BY, Sandy WolkenbergPopulus euphratica Populus euphratica Euphrates poplar Photo: CC BY, Tom FieldPopulus fremontii Populus fremontii Fremont's cottonwood Photo: CC BY, tlaloc27 all 33 ›

Names & registers

Also known as Populus australis; Populus cilicica; Populus jesoensis; Populus monticola; Populus oxyodonta and 31 more. (GBIF Backbone)

GBIFPOWOIPNIWFOWikidataWikipediaiNaturalist

The record

Family
Salicaceae
Described by
L.
Native to
Denmark, Finland, Great Britain +57
Wild records
671 in range · 393 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 answeredasked 2026-10-22GBIF occurrence search API; 16 records within 1 km of a botanic garden, herbarium or zoo left out (4 at a botanic garden or arboretum, 12 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 59.00_16.875, lapse-corrected +14 m at 6.5 °C/km
Wikidata wikidata answeredasked 2026-10-22IPNI and POWO linked by Kew's number for Populus tremula L. (the item's: IPNI 776884-1, POWO 302387-2)
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 11 datasets via GBIF.org; each carries its own licence.

Cultifolio

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