Illustration
Dahoon Holly
Ilex cassine
Also called dahoon, cassine holly and narrowleaf dahoon holly
Dahoon Holly blooms from May through June.
Months here are Northern Hemisphere months; in the Southern Hemisphere, shift them by six months.
Growing Dahoon Holly
Plant it in full sun. It prefers moderate water. It is hardy in USDA zones 7–9. Expect it to reach about 25 ft tall and 12 ft wide at maturity, in roughly 40 years (a house reading).
Is Dahoon Holly toxic to dogs or cats?
- Listed as toxic to dogs and cats by Pet Poison Helpline.
Lists differ and none is complete. If a pet eats a plant and seems unwell, call a veterinarian or a pet poison helpline.
What was checked
Nine facts were checked against named botanical sources, each recorded beside the sources that carried it: mature height and spread, hardiness zones, sun, water, bloom months and color, the trait tags, and years to mature size, which rests on a recorded house rule where no publisher states one and is marked so. Soil, diseases, pests, toxicity and the plant's own names have not yet been read for this plant, and its trait tags are the ones a feature uses rather than every word a page prints. Each fact above carries its own mark. The planting, spacing and size sections are derived from these checked facts by a fixed rule, not checked separately, and the plant type is the library's own classification.
When to plant Dahoon Holly
Plant Dahoon Holly in early spring as soon as the soil is workable, or in early fall at least six weeks before your first frost, so roots establish in cool weather. In zone 8, the middle of its hardy zones 7 to 9, spring means February to April and fall means September or October. Once settled, it blooms from May to June.
Month-by-month timing for your zone is on the planting calendar; if you garden near zone 8, the middle of this plant's hardy range, start with zone 8 in February. Derived from the plant's category, zones and bloom months plus typical zone frost dates, not checked separately.
How big does Dahoon Holly get?
25 fttall5 ft 7 inan adult12 ftwideSee Dahoon Holly in a garden plan: the planner shows it in 3D beside everything else you add, growing toward this size over the years.
How far apart to plant Dahoon Holly
Derived from the mature spread above by a fixed rule, not checked separately: spacing is the spread, center to center.
Give Dahoon Holly about 12 ft of clear ground in every direction, measured from its center. It is one plant with room around it, not a row, and a raised bed is too small for it.
Add Dahoon Holly to a garden plan and the planner draws it at its full width, so you see the spacing before you buy.
Where these facts come from
Dahoon Holly's height, spread, hardiness zones, sun, water, bloom months and color and trait tags were checked against 7 published sources on November 5, 2026. Each one is linked below with every fact it carried, which can include a fact this page still marks as not yet checked, because a source carrying a value is not the same as the value being held to the standard. Facts not in that list, and the planting, spacing and size sections, are not covered by these sources.
- NC State ExtensionGardener Plant Toolboxheight, spread, hardiness zones, sun, water, bloom months and color and trait tags
- fnps.orgFlorida Native Plant Societyheight, spread, hardiness zones, sun, water and bloom months and color
- siteone.comSiteOne Landscape Supplyheight, spread, hardiness zones, water, bloom months and color and trait tags
- Mississippi State University ExtensionPublication 2651height, spread, hardiness zones, sun and water
- dendro.cnre.vt.eduVirginia Tech Dendrologyheight, bloom months and color and trait tags
- unf.eduUniversity of North Florida Botanical Gardenheight, sun and water
- herbarium.ncsu.eduNC State University Herbarium, Trees of North Carolinabloom months and color
How the checking works, and what each standard covers, is on the verified plants page.
Where it grows wild
Native to 8 states
United States: Alabama, Florida, Georgia, Louisiana, Mississippi, North Carolina, South Carolina, Texas
Recorded growing wild in 108 counties.
Also grows wild, but is not native, in Hawaii.
Range data from the World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 4.0, adapted) and USDA PLANTS. How the native range is credited.
Featured in these guides
Explore similar plants
You might also like
Design a garden with this
Drop this plant onto a 3D plan, see how it fills in, and watch your whole garden bloom across the year.