Home
›
Spanish dagger

Spanish dagger

Yucca gloriosa
Spanish dagger, also called mound lily yucca, is an evergreen yucca of coastal sand dunes, beaches and the borders of brackish marshes in the southeastern United States, from North Carolina to northern Florida. The Lady Bird Johnson Wildflower Center calls it rare and local in the wild, yet it reached Europe around 1550 and is one of the most common yuccas in cultivation. Its sword-shaped, blue-grey to green leaves end in sharp tips, so where it goes is a decision, not a detail: keep it back from paths and play areas, or do as UF/IFAS suggests and shear the tips off where it stands near an entry. It grows slowly from a stemless rosette into a clump 6 to 8 feet tall and 4 to 8 feet wide on short, woody trunks, and sends up tall panicles of creamy white bells, often tinged red or purple. Wikipedia reports genetic evidence that it arose from hybrids between Spanish bayonet and Adam's needle. It takes salt spray, heat and drought, grows in zones 6 to 11, and the ASPCA lists yuccas as toxic to dogs, cats and horses.
Native: 7 US states
Climate fit: moderate (58/100)
Border
Container
Focal point
Pollinator
Structure
Light
Full sun / Part sun
Water
Low water
Mature size
6-8 ft tall · 3 ft apart
Hardy in zones
6a-11b
cold to nearly frost-free winters
Life cycle
Perennial
Bloom period
Spring / Summer
Native in Illinois
No

Related products

Sponsored
Shop gardening supplies for Spanish dagger on Amazon ->
Plotwright may earn a commission from purchases made through this link, at no extra cost to you.
Native across 7 US states and Canadian provinces - a wide-ranging part of North America's plant communities.

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.
A Cape honeysuckle (Tecomaria capensis) shrub with arching evergreen foliage and clusters of slender orange tubular flowers.
Tecomaria capensis
Cape honeysuckle
Cape honeysuckle (Tecomaria capensis, Bignoniaceae) is a vigorous, evergreen scrambling shrub from southern and south-central Africa, valued for tubular orange-to-apricot flowers borne erratically across much of the year. It reaches about 6.6 to 9.8 feet tall and wide as a free-standing shrub, or can be trained much taller on a trellis or wall, and is widely used for informal hedging and as a hot-color border or container plant. It is frost-tender (RHS H1C; roughly USDA 9b-11) - in cooler climates it is grown under glass or as a summer container plant and overwintered indoors. In frost-free, mild climates it can become weedy: it has naturalised and is treated as invasive in parts of Australia and on islands such as the Azores, so site it where suckering and self-layering can be managed. It is not a recognised edible and is not flagged as notably toxic, though several plant parts feature in traditional southern-African medicine; treat it as ornamental rather than for consumption. Note the accepted binomial here is Tecomaria capensis (POWO/GBIF); the widely-seen Tecoma capensis is a synonym.
Shrub
Full sun / Part sun
Moderate water
Zones 9b-11
Climate: narrow
Border
Focal point
Pollinator
Structure
Container
Pink Camellia sasanqua flowers with glossy dark leaves at Nagai Botanical Garden, January 2026
Camellia sasanqua
Sasanqua camellia
Sasanqua camellia is an evergreen shrub native to the forests of southern Japan - Kyushu, Shikoku, and the Ryukyu Islands - where it grows on forest margins and hillsides. In gardens it is prized as the earliest-flowering camellia, bearing fragrant blooms from September through January when almost nothing else is in flower, and it tolerates more sun and drought than its cousin Camellia japonica. The honest catch is cold hardiness: open flowers are blackened by hard frost, and the plant itself is reliably hardy only from zone 7a south, making it unsuitable for much of the northeastern and midwestern United States without meaningful shelter.
Shrub
Full sun / Part sun / Part shade
Moderate water
Zones 7a-9b
Climate: narrow
Border
Focal point
Structure
Container
Pollinator
Coronilla valentina flowering in the Zingaro nature reserve, Sicily - clustered bright yellow pea flowers against pinnate green foliage
Coronilla valentina
Shrubby scorpion vetch
Coronilla valentina is a compact, evergreen Mediterranean shrub in the legume family (Fabaceae), with a native range spanning the Mediterranean Basin from Portugal and Spain through Italy, the NW Balkans and Greece to the Aegean and Turkey, and south across northwest Africa to Libya. In a warm, sheltered garden spot it rewards with prolific, intensely honey-scented yellow flowers from late winter into summer and handsome glaucous foliage year-round. The honest catch is cold-hardiness: RHS rates it H4 (hardy to about 14°F), so it is borderline at the cold edge of USDA zone 7 and is liable to be cut to the ground or killed outright in a hard freeze, demanding a sheltered south- or west-facing wall in colder gardens - and the whole plant is toxic to humans and livestock.
Shrub
Full sun / Part sun
Low water
Zones 7b-10b
Climate: narrow
Border
Focal point
Pollinator
Container
Structure
Spanish bayonet (Yucca aloifolia): a dense rosette of stiff, narrow, sword-shaped green leaves with thin pale edges, each tapering to a sharp point, radiating from the top of a stem, with trunks wrapped in shaggy skirts of dead, straw-colored leaves behind it and a yellow-edged agave at lower right, on a garden lawn.
Yucca aloifolia
Spanish bayonet
Spanish bayonet, also called aloe yucca, is the type species of the yucca genus: an evergreen, trunk-forming yucca of sand dunes, shell mounds and the edges of brackish marshes along the southeastern coast of the United States, from North Carolina to Florida and west to Louisiana. Every stiff, dark green leaf, up to 24 inches long, has finely toothed edges and ends in a very sharp spine, so where it goes is a decision, not a detail: NC State Extension says the points will keep out trespassers and advises keeping it away from traffic areas, and the Lady Bird Johnson Wildflower Center warns that the sharp-pointed leaves can be dangerous. It grows slowly into a clump of stems 10 to 15 feet tall, skirted with old dead leaves, and in summer raises panicles of fragrant, white, bell-shaped flowers that open at night. It tolerates salt spray and drought, which makes it a dune and seaside plant for zones 6 to 11, and the ASPCA lists yuccas as toxic to dogs, cats and horses.
Shrub
Full sun / Part sun
Low water
Zones 6a-11b
Climate: moderate
Border
Focal point
Pollinator
Structure
Firebush (Hamelia patens): a terminal cluster of slender, tubular orange-red flowers and buds on red stalks, framed by broad, pointed green leaves with reddish midribs and bronze-red young leaves.
Hamelia patens
Firebush
Firebush (also called scarlet bush, hummingbird bush, and Mexican firecracker) is a fast-growing, evergreen, soft-stemmed shrub in the coffee family (Rubiaceae) and a Florida native: it grows wild from central Florida south through the Florida Keys, and on through the Bahamas, the Caribbean, Mexico, and Central America into South America as far as Argentina. In a frost-free landscape it forms a dense, spreading shrub of 6 to 12 feet, occasionally to 15 feet, with whorls of oval leaves that are red-hairy when young and speckled red or purple at maturity, reddish stems, and terminal clusters of slender, tubular, orange-red flowers 0.5 to 1.5 inches long nearly all year. Hummingbirds and butterflies work the flowers, and birds eat the small berries, which ripen from red to black and are edible. It is frost-tender: a freeze can kill it to the ground, it regrows from the roots through zone 9, and farther north it is grown as a 2 to 3 feet summer annual or container plant. Buy with care, because several non-native firebushes are sold under the same name: plants labeled 'African', 'Dwarf', 'Compacta', or 'Firefly' are often Hamelia patens var. glabra, a variety from southern Mexico to northern South America with smooth leaves and mostly yellow flowers, and 'Bahama firebush' is a different species, Hamelia cuprea. Florida's native form is Hamelia patens var. patens, the plant this record describes.
Shrub
Full sun / Part shade
Moderate water
Zones 9a-11b
Climate: narrow
Pollinator
Border
Structure
Focal point
Container
A mature oakleaf hydrangea (Hydrangea quercifolia) in flower - a broad, mounded multi-stemmed shrub studded with upright white panicles above coarse, deeply lobed oak-shaped leaves.
Hydrangea quercifolia
Oakleaf hydrangea
A four-season native shrub of the southeastern United States, where NC State Extension notes it grows wild in moist woods and along stream banks. It is an upright, multi-stemmed deciduous shrub, slow-growing to roughly 4 to 8 feet tall and 4 to 10 feet wide, named for its large, oak-shaped, lobed dark-green leaves. Showy pyramidal 4-12 inch panicles of creamy-white flowers open from late spring into summer and fade to pink and then tan, while the bold foliage turns wine, orange, and mahogany in fall over peeling cinnamon bark. Easy and low-maintenance in organically rich, well-drained soil, it is grown as a specimen, in masses, or as an informal hedge.
Shrub
Full sun / Part shade
Moderate water
Zones 5a-9b
Climate: moderate
Focal point
Structure
Border
Pollinator

Educator packet

Plant packet
Spanish dagger educator packet
Spanish dagger, also called mound lily yucca, is an evergreen yucca of coastal sand dunes, beaches and the borders of brackish marshes in the southeastern United States, from North Carolina to northern Florida. The Lady Bird Johnson Wildflower Center calls it rare and local in the wild, yet it reached Europe around 1550 and is one of the most common yuccas in cultivation. Its sword-shaped, blue-grey to green leaves end in sharp tips, so where it goes is a decision, not a detail: keep it back from paths and play areas, or do as UF/IFAS suggests and shear the tips off where it stands near an entry. It grows slowly from a stemless rosette into a clump 6 to 8 feet tall and 4 to 8 feet wide on short, woody trunks, and sends up tall panicles of creamy white bells, often tinged red or purple. Wikipedia reports genetic evidence that it arose from hybrids between Spanish bayonet and Adam's needle. It takes salt spray, heat and drought, grows in zones 6 to 11, and the ASPCA lists yuccas as toxic to dogs, cats and horses.
Scientific name
Yucca gloriosa
Plant type
shrub
Hardiness
6a-11b
Light
full-sun, part-sun
Moisture
low
Spacing
3 ft
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). Spanish dagger (Yucca gloriosa). Retrieved from https://plotwright.com/plants/yucca-gloriosa
Sources used for this record
This record is compiled from the sources below.
NC State Extension Gardener Plant Toolbox
University extension service
UF/IFAS Extension
University extension service
Lady Bird Johnson Wildflower Center Native Plant Database
Botanical research database
USDA PLANTS Database
Government data source
eFloras (Flora of North America, Flora of China)
Botanical research database
ASPCA Toxic and Non-Toxic Plants
Botanical research database
GBIF
Botanical research database
Wikipedia (ecoregion articles)
Botanical research database
Wikimedia Commons
Photo · CC BY-SA 4.0
Plants For A Future
Botanical research database