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Dahlia

Dahlia

Dahlia (hybrid)
A tuberous-rooted member of the aster family native to Mexico and Central America, grown for showy summer-to-fall blooms in nearly every color except blue. Hybrids in commerce span ten flower-form groups (single, anemone, collarette, waterlily, decorative, fall, pompon, cactus, semi-cactus, and miscellaneous) and range from 1 to 6 feet tall. Winter-hardy only to USDA Zones 7-10; in colder regions the tubers are lifted in fall and stored frost-free, so most North American gardeners grow it as a summer annual.
Climate fit: moderate (41/100)
Focal point
Border
Container
Pollinator
Light
Full sun / Part shade
Water
Moderate water
Mature size
1-6 ft tall · 24" apart
Hardy in zones
7a-10b
cold to mild winters
AHS heat range
4-11
Plant range authored in AHS heat-zone terms.
Native status
Cultivated - no wild native range
Open-centered dahlia forms (single, collarette, anemone) expose nectar and pollen and attract butterflies and bees, per Missouri Botanical Garden PlantFinder; fully double forms (decorative, pompon, ball, cactus) hide the disc florets and offer little forage.

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
Won't grow here
Zone 7a
Plotwright
0°F to 5°F
Marginal
In plain terms: This location has cold winters. Its winters are projected to keep warming through 2050.
✕→⚠
Out of range today, but marginally possible by 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...

Plant this, not that

Better fit for this place
For Chicago, IL, these are replacement suggestions: similar plants with a stronger hardiness fit now and/or in 2050.

Similar plants

Browse lateral options with similar roles, light needs, size, or native-range overlap; these are not filtered for a better climate fit.
African lily (Agapanthus praecox) - rounded umbels of trumpet-shaped blue flowers on tall bare stalks, strap-shaped arching basal leaves forming a clump, multiple flowering stems in a garden bed showing the perennial's clump-forming habit.
Agapanthus praecox
African lily
A bold, clump-forming evergreen perennial from South Africa, grown for big rounded umbels of trumpet-shaped blue (or white) flowers held on tall bare stalks above arching, strap-shaped leaves in mid-to-late summer. It is widely sold as "lily of the Nile," but that is a misnomer - the plant is South African (the Cape provinces and KwaZulu-Natal), not from the Nile. Spectacular and easy in warm climates, this evergreen Agapanthus is frost-tender, so in cold-winter areas it is grown in a container and overwintered under cover. The RHS has given several Agapanthus praecox forms its Award of Garden Merit and rates this evergreen species half-hardy (H3 - needs winter protection).
Perennial
Full sun / Part shade
Moderate water
Zones 8a-11
Climate: narrow
Focal point
Border
Container
Pollinator
Autumn-joy stonecrop (Hylotelephium 'Herbstfreude') showing a large, flattened cyme of tiny star-shaped rose-pink flowers and pale buds.
Hylotelephium 'Herbstfreude'
Autumn-joy stonecrop
A clump-forming herbaceous perennial grown for its showy late-season flower heads: masses of tiny star-like flowers borne in flattened cymes 3 to 6 inches across that emerge rosy pink, deepen to rose-red, and fade to coppery-rust as they die. Gray-green, fleshy, succulent-like leaves form upright clumps to about 24 inches. Easily grown in dry-to-medium, well-drained soil in full sun, it is drought tolerant and attracts butterflies, and its foliage and dead inflorescences persist into winter for added interest.
Perennial
Full sun / Part shade
Low water
Zones 3a-9b
Climate: moderate
Border
Focal point
Pollinator
Container
Shasta daisy (Leucanthemum × superbum) flower head showing white ray florets radiating around a flat yellow central disc.
Leucanthemum × superbum
Shasta daisy
The classic white-and-yellow garden daisy - a clump-forming herbaceous perennial bearing showy single flower heads of white ray florets around a yellow central disc from midsummer into fall. A garden hybrid bred by Luther Burbank in the 1890s near snow-covered Mt. Shasta in northern California, it grows 2 to 3 feet tall and is a mainstay of the perennial border, cottage garden, and cutting garden. Easily grown in dry-to-medium, well-drained soil in full sun, it is drought tolerant, attracts butterflies, and is resistant to deer and rabbit browsing.
Perennial
Full sun / Part shade
Moderate water
Zones 5a-9b
Climate: moderate
Border
Focal point
Pollinator
Container
African marigold (Tagetes erecta) - large dense globe-shaped double flower head, deep orange color, finely divided pinnate foliage.
Tagetes erecta
African marigold
A tall, bold warm-season annual from Mexico and Guatemala (the "African" name is a misnomer of its European garden history) grown for large, fully double, pompon-like flowerheads in saturated yellow, gold, and orange over strongly aromatic, finely divided foliage. Plants reach 1 to 4 feet and bloom from early summer to frost in full sun. The petals are edible and used as a culinary garnish and natural dye, and the flowers are the iconic "flor de muerto" of Mexican Day of the Dead. Despite the wide listed zone range it is frost-tender and grown for a single warm season.
Annual
Full sun / Part shade
Low water
Zones 2a-11b
Climate: moderate
Border
Focal point
Container
Pollinator
Amaryllis belladonna in bloom: clusters of fragrant pink, funnel-shaped flowers held on bare, leafless stems.
Amaryllis belladonna
Belladonna lily
Amaryllis belladonna, the belladonna lily (also Jersey lily, naked-lady, or March lily), is a bulbous perennial geophyte from the Western Cape of South Africa. It is grown for its dramatic autumn display: leafless stems carry umbels of 6-12 fragrant, funnel-shaped pink to rose flowers that appear before the strap-shaped leaves emerge (a hysteranthous "naked lady" habit). It suits the front-to-mid border, gravel and Mediterranean-style plantings, and large containers in a hot, sheltered, sun-baked spot. Be plain about two cautions: the bulb is only modestly frost-hardy (roughly USDA 8/9-11; RHS H4) and is best given the warmest, driest position available in cooler areas, and ALL parts of the plant are TOXIC, containing lycorine and related Amaryllidaceae alkaloids that cause vomiting and diarrhea if eaten by people or pets. It also naturalizes readily in mild Mediterranean climates, so site it where self-sown spread is welcome.
Perennial
Full sun
Low water
Zones 8b-11
Climate: narrow
Border
Focal point
Pollinator
Container
A pineapple lily (Eucomis comosa) showing a basal rosette of strap-shaped leaves and an upright spike densely packed with pale star-shaped flowers topped by a tuft of leafy bracts.
Eucomis comosa
Pineapple lily
Eucomis comosa, the pineapple lily or wine eucomis, is a deciduous summer-growing bulb in the asparagus family (Asparagaceae), endemic to the Eastern Cape and KwaZulu-Natal provinces of South Africa. From a large, often purple bulb it sends up a basal rosette of strap-shaped leaves and a stout flower spike packed with white-to-purple star flowers, crowned by a tuft of leafy bracts that gives it a pineapple-like silhouette in mid-to-late summer. It is a striking focal-point and container subject for borders, prized for its long-lasting bloom. Hardiness is the load-bearing caution: it is frost-tender to only borderline-hardy (RHS H4, roughly USDA 8–10, surviving brief dips near 23 to 14°F in well-drained, sheltered ground), so in colder climates it is grown in pots and lifted or moved under cover for winter, and it resents winter wet. The bulb and foliage contain saponins and can cause mild mouth irritation, drooling, and stomach upset if eaten, so keep it away from pets and children.
Perennial
Full sun / Part sun
Moderate water
Zones 8a-10b
Climate: narrow
Focal point
Container
Border
Pollinator

Educator packet

Plant packet
Dahlia educator packet
A tuberous-rooted member of the aster family native to Mexico and Central America, grown for showy summer-to-fall blooms in nearly every color except blue. Hybrids in commerce span ten flower-form groups (single, anemone, collarette, waterlily, decorative, fall, pompon, cactus, semi-cactus, and miscellaneous) and range from 1 to 6 feet tall. Winter-hardy only to USDA Zones 7-10; in colder regions the tubers are lifted in fall and stored frost-free, so most North American gardeners grow it as a summer annual.
Scientific name
Dahlia (hybrid)
Plant type
perennial
Hardiness
7a-10b
Light
full-sun, part-shade
Moisture
moderate
Spacing
24 inches
Classroom prompts
- Which plant traits are observations, and which are care recommendations?
- How would this plant fit change if the garden location moved warmer, colder, wetter, or drier?
- Which source-backed facts would you cite in a lesson handout?
Use the Sources & citations section below for page citation styles and the field-level source list.

Sources & citations

Cite this page
For lesson plans, articles, or research that uses this page. Use the source cards below to explore the references that informed this record.
Plotwright. (2026, May 17). Dahlia (Dahlia (hybrid)). Retrieved 2026, August 20, from https://plotwright.com/plants/dahlia-hybrid
Sources used for this record
This record is compiled from the sources below.
Missouri Botanical Garden PlantFinder
Botanical research database
RHS Find a Plant
Botanical research database
GBIF
Botanical research database
Wikipedia (ecoregion articles)
Botanical research database
Wikimedia Commons
Photo · CC BY-SA 4.0