Sycamore Maple Acer pseudoplatanus
Sycamore Maple is an introduced perennial tree, found in Canada and the lower 48 states. It grows to 70 ft and blooms May in part shade – shade, with green fruit.
More about this plant
Acer pseudoplatanus, known as the sycamore in the British Isles and as the sycamore maple in the United States, is a species of maple native to Central Europe and Western Asia. It is a large deciduous, broad-leaved tree, tolerant of wind and coastal exposure. Wikipedia →
Sycamore Maple is flagged invasive in the U.S. These natives fill a similar niche — same growth habit, bloom season, height, and region — so you keep the look and feed local wildlife instead of spreading a problem.
Growing & care
USDA PLANTS · TRY- Sun
- Part shade – shade
- Soil & moisture
- Medium moisture
- Soil pH
- 5.8–7
- Fertility need
- Medium
- Adapts to
- Medium (loam), Fine (clay)
- Hardiness
- USDA zone 5+
- Drought tolerance
- Moderate
- Shade tolerance
- High
- Wet-soil tolerance
- Low waterlogging
- Height
- 70 ft
- Mature width
- ≈ 30 ft wide wild/forest-grown — open-grown specimens spread wider
- Spacing
- 8–12 ft apart from USDA planting density
- Spread
- None — clumping
- Growth rate
- Moderate
- Growth form
- Single stem
- Lifespan
- Perennial · moderate
- Foliage
- Deciduous broadleaf · coarse texture
- Active growth
- Spring & summer
- Fruit
- Green
- Propagate by
- Seed, Cuttings, Bare root, Container
- Seed starting
- Needs cold stratification a cold-moist spell before it germinates
- Seeds ripen
- Spring – Summer seed-collection / harvest window
- In the trade
- No known commercial source
- Deer browsing
- Low often deer-resistant
- Resprouts if cut
- Yes regrows after top-kill
Sow timing keys off your local last- and first-frost dates.
Wildlife & pollinators
How pollinator value is scored →❧ Caterpillar hosts ~297 caterpillar species · keystone genus
Acer supports ~297 caterpillar species.
Native butterfly & moth caterpillars are the base of the terrestrial food web — most songbirds rear their young almost entirely on them. As a host for native Lepidoptera this is a powerhouse genus.
Recorded feeding on Acer in North America, including:
+ 8 more species → ↑ show fewer
✦ Bees 42 bee visitors
42 native & managed bee species are documented visiting Sycamore Maple — the 12 most-recorded:
Wildlife & visitors 57 birds · 4 mammals · 7 nectaring
Open records of who else uses Sycamore Maple — a generalist food-web signal, kept separate from the keystone Ecological Value.
Recorded eaten by 57 birds and 4 mammals species (fruit, seed, browse) — the most-recorded:
+ 4 more species → ↑ show fewer
7 adult butterfly & moth species are recorded nectaring at its flowers — the most-recorded:
Related plants
More Acer →
How we know this (3) Methods & honest limits
We read each species’ measured specific leaf area (leaf area per unit dry weight) from the Global Spectrum dataset and band it: thin & fast (high SLA), medium, or thick & tough (low SLA). The global median is about 10 mm²/mg.
Honest limits: A species-mean from pooled measurements — individual plants vary with light and site. A broad strategy signal, not a precise per-plant figure.
A recorded categorical fact: each species is tagged C3 (standard), C4 (heat/water-efficient) or CAM (succulent, night-time CO₂ uptake) — or a facultative combination. We only show a trait card for the noteworthy C4/CAM cases; C3 is the unremarkable majority, kept in the data but not surfaced as a card.
We take the plant’s U.S. county range and look up each county’s long-term climate, then summarise: native rainfall = the median annual rainfall across its counties; heat tolerance = the warm end (90th percentile) of average temperature across its range (mirroring how our cold-hardiness floor uses an extreme). Counties + medians blunt the roadside/observer bias that makes point-level climate unreliable. Needs at least five placeable counties.
Honest limits: A realized, sampling-biased niche (where it has been recorded, not its physiological optimum), and county climate is coarse — large Western counties span deserts and mountains. Derived guide, never a measured fact.
Sources for this entry (37) Open & cited
Cite this page Open data, please attribute
PlantKey’s data is open under CC BY-SA 4.0 — free to reuse and adapt, with attribution and the same licence. Photos keep their own per-image licence + credit (see Sources above).
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