Hydrocharis morsus-ranae | Also known as: Frog's bit | Rating: 2 votes | Print / Pdf

A deciduous, free-floating aquatic plant, hydrocharis morsus-ranae is commonly known as frogbit for obvious reasons. Its flat, mid-green and leathery kidney-shaped leaves greatly resemble lily pads, but are much smaller. Each plant produces rosettes of these leaves, which group together on the water surface to create a mat of greenery on a pond or lake. In summer, it produces small three-petalled white blossoms with bright yellow centres. Frogbit grows best in clear clean water. It is considered an endangered species so is hard to find. Dormant in winter, it is an ideal option for quiet garden ponds, adding considerably to the character of the water feature.

Rate it:
Known dangers?
  • no
Height [m]
  • 0 - 0.2
Spread [m]
  • 0.1
Dominant flower colour
  • White
Flower Fragrance
  • No, neutral please
Flowering seasons
  • Early summer
  • Mid summer
  • Late summer
Foliage in spring
  • Green
Foliage in summer
  • Green
Foliage in Autumn
  • Green
Propagation methods
  • seed
Growth habit
  • Mat-forming
  • Acidic
  • Neutral
  • Alkaline
Hardiness zone
  • Z6-11
Heat zone
  • H12-7
Winter temperatures [°C]
  • -23 - 4
Heat days
  • 60 - 210
  • well-drained
  • well-drained but frequently watered
Soil type
  • Clay
  • loams
Sun requirements
  • Full sun
  • Exposed
  • Sheltered
Standard category
  • Aquatic & semiaquatic plants
  • Aquatic plants
Grown for
  • Attractive flowers and foliage
Creative category
  • Kid Approved
  • For Beginners
  • Colours
  • Pond plants
Garden type
  • Pond
  • Wildlife gardens
Gardening expertise
  • beginner
Time to reach full size
  • up to 10 years