Hydrocleys nymphoides

(Water Poppy)


Hardiness Zones:

 10a  10b  9a  9b

Quick Overview:

Water poppy floating plants are perennial aquatic ornamentals hardy to USDA zones 9-11. Native to Central and South America, the plant produces a multitude of flat leaves with a glossy texture. Cheerful, yellow flowers spring forth from the mass of foliage when water temperatures reach at least 70 F.


Water poppies should be planted in rich soil along pond margins or in shallow fresh water (pH 6.5-7.5). They prefer less than 15cm (6″) of water but can survive in depths up to 40cm (16″). Water poppies should be planted on pond bottoms in containers or wet loam—a fertile mud composed of equal parts sand, silt, and clay. If using a container, the bottom two-thirds should be filled with special aquatic soil (not lightweight potting mix) and the roots spread out over top. More aquatic soil should then be added so the base of the stem is in around 2.5cm (1″) of soil. If planted in pond margins, water poppies will grow outward onto the water’s surface with floating stems.

Additional information

Common Name

Water Poppy


small clump

Evergreen or Deciduous


Hardiness Zone

10a, 10b, 9a, 9b

Growth Rate


Light Requirements

Part-sun, Sun





Water Needs

Standing Water

Blooming Period

summer through fall

Flower Color

Lemon yellow



Foliage Color

glossy green

Deer Resistant


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