Photo by Melody

PlantFiles: Calla Lily
Zantedeschia 'Hercules'

Family: Araceae (a-RAY-see-ee) (Info)
Genus: Zantedeschia (zan-te-DES-kee-uh) (Info)
Cultivar: Hercules

6 members have or want this plant for trade.


6-8 ft. (1.8-2.4 m)

6-8 ft. (1.8-2.4 m)

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)
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:
Sun to Partial Shade

All parts of plant are poisonous if ingested

Bloom Color:
White/Near White

Bloom Time:
Blooms all year
Blooms repeatedly

Grown for foliage

Other details:
Requires consistently moist soil; do not let dry out between waterings
Self-sows freely; deadhead if you do not want volunteer seedlings next season
Flowers are good for cutting
Provides winter interest
Suitable for growing in containers

Soil pH requirements:
5.6 to 6.0 (acidic)
6.1 to 6.5 (mildly acidic)

Patent Information:
Unknown - Tell us

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

Seed Collecting:
Allow seedheads to dry on plants; remove and collect seeds
Remove fleshy coating on seeds before storing
N/A: plant does not set seed, flowers are sterile, or plants will not come true from seed

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By Kell
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By Calif_Sue
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1 positive
1 neutral
No negatives

Gardeners' Notes:

Positive vossner On Feb 16, 2008, vossner from Richmond, TX (Zone 9a) wrote:

This is the non-spotted Hercules, which I bought from Kartuz, which in turn bought theirs from Western Hills many years ago.

It bloomed for the first time in Feb 2008. Flower not very big but it is a young plant. Planted inground, partial sun. Has not gone dormant in the 2 years I've grown it.

Neutral Kell On Feb 5, 2008, Kell from Northern California, CA (Zone 9b) wrote:

This is the cultivar Strybing Arboretum in San Francisco is growing and selling that originally came from Western Hills Nursery in Occidental, CA. It is a huge variety with great white spots. There is also a nonspotted one with the same name that also came from Western Hills Nursery years ago to add to the confusion. The Strybing calls it Zantedeschia "Hercules" though many sources call it Zantedeschia aethiopica "Hercules".

In warmer areas it will bloom year round.


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

San Francisco, California
San Jose, California
San Leandro, California
Somis, California
Portland, Oregon
Richmond, Texas

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