Illustration
Carlton Daffodil
Narcissus 'Carlton'
Also called carlton daffodil bulbs, carlton large-cupped daffodil and daffodil 'carlton'
Carlton Daffodil blooms from March through April.
Months here are Northern Hemisphere months; in the Southern Hemisphere, shift them by six months.
Growing Carlton Daffodil
Plant it in full sun. It prefers moderate water. It is hardy in USDA zones 3–8. Expect it to reach about 20 in tall and 4 in wide at maturity, in roughly 1 year (a house reading).
Is Carlton Daffodil toxic to dogs or cats?
- Listed as toxic to dogs and cats by NC State Extension, Pet Poison Helpline and Royal Horticultural Society.
- Listed as poisonous to people by NC State Extension and Royal Horticultural Society.
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
Mature height and spread, hardiness zones, sun, water, bloom months and color and the trait tags were checked against named botanical sources for this plant, with what the sources could not settle written down; years to mature size rests on a recorded house rule where no publisher states one, and is marked so; its common name and alternate names have not been checked yet. 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 Carlton Daffodil
Carlton Daffodil is a fall-planted bulb: get it in the ground 6 to 8 weeks before the ground freezes, typically September or October in zone 5, the middle of its hardy zones 3 to 8. It pays you back the following March to April.
Month-by-month timing for your zone is on the planting calendar; if you garden near zone 5, the middle of this plant's hardy range, start with zone 5 in September. Derived from the plant's category, zones and bloom months plus typical zone frost dates, not checked separately.
How big does Carlton Daffodil get?
20 intall5 ft 7 inan adult4 inwideSee Carlton Daffodil in a garden plan: the planner shows it in 3D beside everything else you add, growing toward this size over the years.
Where these facts come from
Carlton Daffodil's height, spread, hardiness zones, sun, water, bloom months and color, trait tags, soil, diseases, pests and toxicity were checked against 9 published sources on October 13, 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.
- Plant Addictsheight, spread, hardiness zones, sun, water, bloom months and color, trait tags, soil and pests
- RHSRoyal Horticultural Societysun, water, bloom months and color, soil, diseases, pests and toxicity
- whiteflowerfarm.comWhite Flower Farmheight, spread, hardiness zones, sun, bloom months and color and trait tags
- Chicago Botanic Gardenheight, hardiness zones, bloom months and color, trait tags and toxicity
- NC State Extensionwater, trait tags, diseases, pests and toxicity
- projectblue.blob.core.windows.netHorticultural Development Company (AHDB), Narcissus Manual, Gordon Hanksbloom months and color, trait tags and diseases
- daffseek.orgAmerican Daffodil Society, DaffSeekheight and bloom months and color
- The Morton Arboretumbloom months and color
- dergipark.org.trEge University, Bayindir Vocational School; Journal of Agricultural Fa...height
How the checking works, and what each standard covers, is on the verified plants page.
Good to know about Carlton Daffodil
Curated from university extensions, botanic gardens and other primary sources, with the source named on every note.
Safety
Every part is poisonous, the bulb most of all; the alkaloid lycorine sickens dogs, cats, horses and people. Handling the sap or bulb can cause a skin rash. per ASPCA and NC State
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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.