Photo by Melody

PlantFiles: Peruvian Daffodil
Hymenocallis festalis 'Zwanenburg'

Family: Amaryllidaceae (am-uh-ril-id-AY-see-ee) (Info)
Genus: Hymenocallis (hy-men-oh-KAL-is) (Info)
Species: festalis (FES-tuh-liss) (Info)
Cultivar: Zwanenburg

Synonym:Ismene festalis

3 vendors have this plant for sale.

One member has or wants this plant for trade.


18-24 in. (45-60 cm)

12-15 in. (30-38 cm)

USDA Zone 8a: to -12.2 C (10 F)
USDA Zone 8b: to -9.4 C (15 F)
USDA Zone 9a: to -6.6 C (20 F)
USDA Zone 9b: to -3.8 C (25 F)
USDA Zone 10a: to -1.1 C (30 F)
USDA Zone 10b: to 1.7 C (35 F)

Sun Exposure:
Full Sun


Bloom Color:
White/Near White

Bloom Time:
Mid Spring
Late Spring/Early Summer
Mid Summer


Other details:
Average Water Needs; Water regularly; do not overwater
Flowers are fragrant

Soil pH requirements:
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)

Patent Information:
Unknown - Tell us

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

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to view:

By jmorth
Thumbnail #1 of Hymenocallis festalis by jmorth

By jmorth
Thumbnail #2 of Hymenocallis festalis by jmorth

By jmorth
Thumbnail #3 of Hymenocallis festalis by jmorth


2 positives
No neutrals
No negatives

Gardeners' Notes:

Positive onthelevel On Sep 25, 2012, onthelevel from Calahoo
Canada wrote:

I too purchased these bulbs at a Walmart. I planted them late in a raised box next to a concrete wall facing south. I should mention that we are in zone 4! Much to my delight, they not only grew approximately 28" tall, but produced 3 lightly fragrant flowers per stem! It is now late September and we have had several frosty nights already. Since the foliage is still so green and hardy, I will most likely wait until mid October to up root them and store them until planting in late May, early June of 2013. They received no special treatment and were quite wet most of the summer as we have had an unusually high amount of precipitation, however, that being said, it is now extremely dry so I did water them this past week. Their survival will be dependent on their winter storage. Will let all know how they make out next spring. Mmmmm, I think this plant will grow anywhere! Cheers!! onthelevel, Edmonton,Alberta, Canada

Positive jmorth On Dec 11, 2009, jmorth from Divernon, IL (Zone 5b) wrote:

Mine are grown in large containers and overwintered dry in the basement. Flowers have a wonderful 'sculptural' quality. Seems pest-proof. Forms quite large bulbs that form offsets. Also known as Ismeme


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

Atlanta, Georgia
Divernon, Illinois
Calabash, North Carolina

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