Panicled Hydrangea Hydrangea paniculata
Panicled Hydrangea is an introduced perennial shrub, found in Canada and the lower 48 states. It grows to 25 ft and blooms Jun – Oct.
More about this plant
Hydrangea paniculata, or panicled hydrangea, is a species of flowering plant in the family Hydrangeaceae native to southern and eastern China, Korea, Japan and Russia (Sakhalin). It was first formally described by Philipp Franz von Siebold in 1829. Wikipedia →
Growing & care
USDA PLANTS · TRY- Hardiness
- ≥ zone 6 derived from its U.S. range
- Drought tolerance
- Moderate
- Shade tolerance
- Low
- Wet-soil tolerance
- Low waterlogging
- Height
- 25 ft
- Lifespan
- Perennial
- Foliage
- Deciduous broadleaf
- Flower colour
- Pink AI AI image-analysis of community-science photos — lower-confidence (a more subjective call, often an inconspicuous flower); not a botanical record
Wildlife & pollinators
How pollinator value is scored →❧ Caterpillar hosts ~5 caterpillar species
Hydrangea supports ~5 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 modest genus.
Recorded feeding on Hydrangea in North America, including:
+ 2 more species → ↑ show fewer
✦ Bees 8 bee visitors
8 native & managed bee species are documented visiting Panicled Hydrangea :
+ 2 more bees → ↑ show fewer
Wildlife & visitors 19 nectaring
Open records of who else uses Panicled Hydrangea — a generalist food-web signal, kept separate from the keystone Ecological Value.
19 adult butterfly & moth species are recorded nectaring at its flowers — the most-recorded:
Related plants
More Hydrangea →
How we know this (2) Methods & honest limits
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.
McKenzie et al. assigned each species a flower colour with a GPT-4V vision model over iNaturalist photos. We use the confident tier plus a separately-labelled lower-confidence top-up (mostly inconspicuous green/brown flowers), and render it as a small tint — never as an asserted fact, and kept out of the written synopsis.
Honest limits: AI image inference (~87% expert agreement on the confident tier); a decorative, confidence-tiered indicator, not a measured trait.
Sources for this entry (27) 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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