Hardy Water Lily (Nymphaea 'Helvola') in the Nymphaeas Database

Also sold as:
Pygmaea Helvola
Yellow Pygmy

General Plant Information (Edit)
Plant Habit: Herb/Forb
Life cycle: Perennial
Sun Requirements: Full Sun to Partial Shade
Water Preferences: In Water
Minimum cold hardiness: Zone 4a -34.4 °C (-30 °F) to -31.7 °C (-25 °F)
Maximum recommended zone: Zone 10b
Plant Height: 1 to 4 inches
Plant Spread: 18 to 24 inches
Leaves: Unusual foliage color
Other: 4 inch oval, green with purple mottling and purple undersides; float on water surface.
Flowers: Showy
Other: Semi-double, open in the morning and close at night. Flowers persist for about five days.
Flower Color: Yellow
Bloom Size: 1"-2"
Flower Time: Other: Late spring or early summer until first frost.
Underground structures: Rhizome
Uses: Water gardens
Resistances: Humidity tolerant
Propagation: Other methods: Division
Containers: Suitable in 1 gallon
Suitable in 3 gallon or larger

Photo courtesy of: coniferconifer

Photo gallery:
Location: Chiba city Floral museum - JapanPhoto courtesy of: coniferconifer
By admin
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Location: My garden, Calgary, Alberta, Canada; zone 3.Date: 2012-12-03
By growitall
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Photo Courtesy of Garden Perennials. Used with Permission.
By Joy
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Photo courtesy of: rael.tw@gmail.com
By admin
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Photo courtesy of: rael.tw@gmail.com
By admin
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Discussion Threads about this plant
Thread Title Last Reply Replies
nymphaea pygmaea Helvola questions by Xeramtheum Oct 4, 2018 3:21 PM 17

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