Alphabetical Plant Listing

Hydrocleys nymphoides (Water Poppy)

Water Poppy


Hydrocleys nymphoides (Water Poppy) is an emergent aquatic perennial with thick, shiny, broadly heart-shaped, dark green leaves, 2-4 in. (5-10 cm), on trailing stems up to 3 ft. long (90 cm). They usually float on the water surface, but occasionally rise above. In summer, the plant boasts showy light yellow flowers, 2 in. across (5 cm), adorned with a reddish-brown center and a bouquet of black or brown stamens. Rising up above the water surface, the blossoms last only one day but they are produced in succession over a long summer period. Blooming occurs in water that has reached at least 70ºF (21ºC). Native to Central and South America, Water Poppy spreads from runners across the surface of the water, anchoring themselves by roots and producing new plants at their leaves. Water Poppy provides quick surface cover and can be utilized in ponds or water gardens.

  • Grows up to 6-12 in. tall (15-30 cm) and 1-5 ft. wide (30-150 cm).
  • Performs best in full sun in moderately fertile wet loams up to 6 in. (15 cm) below the water surface. Will survive in water up to 12-15 in. deep, but prefers shallow conditions (6 in.)
  • No serious pest or disease issues.
  • Propagate by seed or by dividing off floating stems that have produced roots (rooted plantlets).
  • Monitor the growth and thin as necessary.
  • Overwinter indoors in non tropical climates in a shallow tub but keep moist and provide strong light.
  • Native to Central and South America.
  • Hydrocleys nymphoides has been recorded as invasive on several continents (Europe, Australia and Asia). Find where it is invasive in the U.S.

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Requirements

Hardiness 9 – 11
Plant Type Aquatic Plants, Perennials
Exposure Full Sun
Season of Interest Summer (Early,Mid,Late)
Height 6" – 1' (15cm – 30cm)
Spread 1' – 5' (30cm – 150cm)
Water Needs High
Maintenance Low
Soil Type Clay, Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Poorly Drained
Characteristics Showy, Evergreen
Tolerance Wet Soil
Garden Uses Ponds and Streams, Rain Gardens, Water Gardens

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Doug Beckers, Flickr

While every effort has been made to describe these plants accurately, please keep in mind that height, bloom time, and color may differ in various climates. The description of these plants has been written based on numerous outside resources.


Requirements

Hardiness 9 – 11
Plant Type Aquatic Plants, Perennials
Exposure Full Sun
Season of Interest Summer (Early,Mid,Late)
Height 6" – 1' (15cm – 30cm)
Spread 1' – 5' (30cm – 150cm)
Water Needs High
Maintenance Low
Soil Type Clay, Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Poorly Drained
Characteristics Showy, Evergreen
Tolerance Wet Soil
Garden Uses Ponds and Streams, Rain Gardens, Water Gardens

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