Long-cupped Narcissus, Large-cupped Daffodil
Narcissus 'Fortissimo'

Family: Amaryllidaceae (am-uh-ril-id-AY-see-ee) (Info)
Genus: Narcissus (nar-SIS-us) (Info)
Cultivar: Fortissimo
Hybridized by de Graaff-van Konynenburg
Registered or introduced: 1964
» View all varieties of Daffodils


Division 2 - Large-cupped


12-18 in. (30-45 cm)


3-6 in. (7-15 cm)

Bloom Time:

Mid Spring


USDA Zone 3b: to -37.2 C (-35 F)

USDA Zone 4a: to -34.4 C (-30 F)

USDA Zone 4b: to -31.6 C (-25 F)

USDA Zone 5a: to -28.8 C (-20 F)

USDA Zone 5b: to -26.1 C (-15 F)

USDA Zone 6a: to -23.3 C (-10 F)

USDA Zone 6b: to -20.5 C (-5 F)

USDA Zone 7a: to -17.7 C (0 F)

USDA Zone 7b: to -14.9 C (5 F)

USDA Zone 8a: to -12.2 C (10 F)

USDA Zone 8b: to -9.4 C (15 F)

Sun Exposure:

Full Sun

Sun to Partial Shade


Parts of plant are poisonous if ingested

Handling plant may cause skin irritation or allergic reaction

Bloom Color:


Pale Yellow



Other details:

Unknown - Tell us

Soil pH requirements:

6.1 to 6.5 (mildly acidic)

6.6 to 7.5 (neutral)

7.6 to 7.8 (mildly alkaline)

Patent Information:


Propagation Methods:

By dividing rhizomes, tubers, corms or bulbs (including offsets)

Seed Collecting:

N/A: plant does not set seed, flowers are sterile, or plants will not come true from seed

Foliage Color:

Unknown - Tell us

Bloom Characteristics:

Unknown - Tell us

Water Requirements:

Average Water Needs; Water regularly; do not overwater

Where to Grow:

Unknown - Tell us


This plant has been said to grow in the following regions:

Canoga Park, California

Garberville, California

Cordele, Georgia

Decatur, Georgia

Marietta, Georgia

Macy, Indiana

Barbourville, Kentucky

Coushatta, Louisiana

Englishtown, New Jersey

Nineveh, New York

Morehead City, North Carolina

Belfield, North Dakota

Felicity, Ohio

, Ontario

Media, Pennsylvania

Norristown, Pennsylvania

Wilkes Barre, Pennsylvania

Conway, South Carolina

Vancouver, Washington

show all

Gardeners' Notes:


On Apr 13, 2006, TBGDN from (Zone 5a) wrote:

This is probably the largest flowered narcissus I grow. The orange color intensifies after a day or two. Like many other narcissus, the true or advertised color sometimes takes several days to develop; i.e. Salome, Romance, Mount Hood, etc. It is usually very windy here during bloom season, and they are likely to bend with the wind.


On Apr 16, 2004, Melissa_Ohio from Southwestern, OH (Zone 6b) wrote:

The only thing I don't like about this daf is that it has a hard time keeping it's head up. But the flower is huge, and it's a beautiful daf.