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Blue vervain

Blue vervain

Verbena hastata
A native vervain of eastern and central North American wet meadows, stream banks, and rain gardens — a rough, clump-forming perennial with stiff, square hairy stems that branch above into candelabra-like spires. Slender, pencil-like spikes carry tiny purplish-blue tubular flowers that open a few at a time from the bottom up over a long July-to-September bloom. Attracts hummingbirds and butterflies and carries Special Value to Native Bees.
Native: 38 US states + 8 CA provinces
Climate fit: broad (87/100)
Pollinator
Border
Light
Full sun
Water
Consistent moisture
Mature size
24-72" tall · 18" apart
Hardy in zones
3a-8b
brutally cold to frosty winters
AHS heat range
1-11
Plant range authored in AHS heat-zone terms.
Native in Illinois
Yes

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A documented larval host for the Common buckeye — caterpillars feed on its foliage before becoming the next generation.

Cold hardiness

These values are location-based: this location's current hardiness is the baseline, and the 2050 value is a projected future climate for this same location.
Now
Zone 6b
Plotwright
USDA Zone 6b
-5°F to 0°F
Well-suited
Zone 7a
Plotwright
0°F to 5°F
Well-suited
In plain terms: This location has cold winters. Its winters are projected to keep warming through 2050.
Well-suited today and still thriving in 2050.

Heat tolerance

Heat tolerance values are location-based too: heat days today are observed at this site, and the 2050 value projects this same location under a future climate.
Loading AHS heat-zone data for this location...

Similar plants

Browse lateral options with similar roles, light needs, size, or native-range overlap; these are not filtered for a better climate fit.
Agastache foeniculum
Anise hyssop
An upright, clump-forming perennial of the mint family native to the upper Midwest, Great Plains, and into central Canada, named for its anise-scented foliage. From June through September it carries dense terminal spikes of lavender-to-purple two-lipped flowers above square stems and opposite, toothed leaves. The Lady Bird Johnson Wildflower Center flags it as a nectar source with special value to native bees, bumble bees, and honey bees, and it also draws butterflies and hummingbirds.
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Pollinator
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Aromatic aster
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Pollinator
Border
Rudbeckia fulgida
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Baptisia australis
Blue false indigo
A long-lived native perennial of central and eastern US woodland borders and prairie meadows with deep blue pea-shaped flowers in late spring, blue-green leguminous foliage, attractive black seed pods for winter interest, and a nitrogen-fixing root system (Fabaceae). Larval host for 6 documented butterfly species per NC State (orange sulphur, clouded sulphur, frosted elfin, eastern tailed-blue, hoary edge, wild indigo duskywing) — among the highest Lep-host-count perennials in the eastern flora.
Perennial
Full sun / Part shade
Moderate water
Zones 3a-9b
Climate: broad
Border
Pollinator
Focal point
Structure
Lobelia cardinalis
Cardinal flower
A short-lived native perennial of wet woodland edges, stream banks, and ditches across the Americas, named for the brilliant scarlet-red flowers that rise on erect, unbranched terminal spikes from mid-to-late summer. Each tubular, two-lipped bloom is shaped for the hummingbird tongue — the plant depends on ruby-throated hummingbirds for pollination because most insects cannot work the long flower tube. It demands constant moisture and tolerates brief flooding, but its foliage carries alkaloids that are very toxic to humans if eaten.
Perennial
Full sun / Part sun / Part shade
Consistent moisture
Zones 3a-9b
Climate: broad
Focal point
Pollinator
Border
Achillea millefolium
Common yarrow
A drought- and heat-tolerant perennial in the daisy family with fern-like aromatic foliage and flat-topped flower clusters. Native to temperate North America, Europe, and western Asia; one of the most climate-resilient pollinator plants for full-sun beds, lawn alternatives, and naturalized meadows.
Perennial
Full sun
Low water
Zones 3a-9b
Climate: broad
Pollinator
Border
Filler

Sources & citations

Cite this page
For lesson plans, articles, or research that uses this page. To cite a single upstream fact instead, use its specific source listed below.
Plotwright. (2026, May 17). Blue vervain (Verbena hastata). Retrieved 2026, June 24, from https://plotwright.com/plants/verbena-hastata
Sources for every fact
Every fact on this page traces to a source. 18 fields cited - 18 source-backed.
Missouri Botanical Garden PlantFinder
Botanical research database
Backs 17 fields
Identity
Summary
Plant type
Light
Moisture
Hardiness
Heat zone
Size
Spacing
Habit
Design roles
Seasonal interest
Growth stages
Lifecycle
Regional guidance
Success tips
Designer notes
Wikimedia Commons
Photo · CC BY 2.0
Backs 1 field
Image
Lady Bird Johnson Wildflower Center Native Plant Database
Botanical research database