Home
Fennel

Fennel

Foeniculum vulgare
A Mediterranean-native culinary herb grown for its anise-scented feathery foliage and seeds, both harvested for the kitchen. Upright branching stems rise 4-6 feet and carry flattened compound umbels of tiny yellow flowers in early summer, followed by aromatic seeds. The showy flowers draw butterflies and the foliage is a larval host for swallowtail caterpillars — but fennel self-seeds freely and has naturalized across North America, so spent flowering stems are best cut before seed sets.
Climate fit: moderate (55/100)
Edible
Pollinator
Structure
Light
Full sun
Water
Moderate water
Mature size
48-72" tall · 18" apart
Hardy in zones
4a-9b
very cold to frosty winters
AHS heat range
4-11
Plant range authored in AHS heat-zone terms.
Native in Illinois
No

Related products

Sponsored
Shop gardening supplies for Fennel on Amazon ->
Plotwright may earn a commission from purchases made through this link, at no extra cost to you.
A documented larval host for the Black swallowtail and 1 other species — 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.
Rubus allegheniensis
Allegheny blackberry
A native eastern + central North American thicket-forming shrub producing arching thorny canes + clusters of large sweet black berries in mid-to-late summer. Among the most important wildlife fruit producers in eastern forests — birds, mammals, + insects all depend on the fruit. Like raspberry, biennial-caned (primocane year 1, fruits in year 2 as floricane, then dies back). Spreads via root suckers + tip-rooting cane tips; manage with annual pruning.
Shrub
Full sun / Part sun
Moderate water
Zones 3a-8b
Climate: broad
Edible
Pollinator
Structure
Sambucus canadensis
American elderberry
A fast, suckering native shrub of streambanks and moist thickets across eastern North America, grown for huge flat-topped cymes of tiny lemon-scented white flowers in early summer and the clusters of dark elderberry drupes that follow. Spreads by root suckers into naturalized colonies 5-12 feet tall and wide; the flowers feed butterflies and the showy fruit feeds birds. The raw berries are not eaten fresh — they are cooked into jelly, pie, and wine.
Shrub
Full sun / Part sun / Part shade
Consistent moisture
Zones 3-9
Climate: broad
Structure
Edible
Pollinator
Focal point
Prunus maritima
Beach plum
A low, densely branching coastal shrub of northeastern dunes, smothered in white spring blossom and prized for the tart blue-purple plums that follow. The Lady Bird Johnson Wildflower Center documents it native from New Brunswick down the Atlantic seaboard to New Jersey, growing in sand and gravel near the sea, where it is both salt tolerant and drought tolerant. It carries Special Value to Native Bees, feeds birds with its fruit, and is self-incompatible — a second seedling is needed to set a real crop.
Shrub
Full sun
Low water
Zones 3a-7b
Climate: moderate
Structure
Pollinator
Edible
Aronia melanocarpa
Black chokeberry
A drought-and-flood-tolerant native shrub of eastern North America with brilliant three-season interest — spring white-pink flowers, glossy black antioxidant-rich late-summer berries, and brilliant wine-red fall foliage — plus an extraordinarily wide cold-hardiness range (USDA 3a-8b). The berries are astringent fresh but the basis of a small but growing commercial industry (juices, wines, jams, supplements) for their exceptionally high anthocyanin content. Spreads by suckers; site where colony formation is welcome.
Shrub
Full sun / Part shade
Moderate water
Zones 3a-8b
Climate: broad
Border
Pollinator
Structure
Edible
Ribes aureum
Golden currant
An upright, multi-stemmed, rhizomatous deciduous shrub of the western U.S. and Canada, named for its showy, fragrant yellow-to-orange spring flowers. Glossy lobed leaves turn reddish-purple in fall, and the spring bloom gives way to edible black currants by mid to late summer. Tough and adaptable — it tolerates dry to seasonally flooded soils, poor and clay soils, drought, and erosion, and the flowers and fruit feed hummingbirds, butterflies, and birds.
Shrub
Full sun / Part sun / Part shade
Moderate water
Zones 4a-8b
Climate: broad
Structure
Pollinator
Edible
Vaccinium corymbosum
Highbush blueberry
A deciduous edible shrub for acidic soils, spring flowers, summer berries, pollinator value, and strong fall color.
Shrub
Full sun / Part sun
Consistent moisture
Zones 3-8
Climate: broad
Edible
Pollinator
Structure

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). Fennel (Foeniculum vulgare). Retrieved 2026, June 24, from https://plotwright.com/plants/foeniculum-vulgare
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-SA 4.0
Backs 1 field
Image
NC State Extension Gardener Plant Toolbox
University extension service