How to Plant Frogbit in a Pond (Care & Grow Guide)

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How to Plant Frogbit in a Pond (Care & Grow Guide)

Frogbit or Limnobium laevigatum is an aquatic plant well-known for its green, fleshy, heart-shaped leaves, similar to a miniature water lily. It has beautiful, small white flowers that bloom in summer.

Since Frogbit is also a floating plant, you can use it as shade from the sun (to inhibit algae growth) or as protection for your pond fish from predators. The many roots also make it suitable for added filtration.

It is important to note, however, that Frogbit is classified as an invasive species in some states, so you may have to check local regulations before planting. You should always keep the plants away from public lakes or waterways in any state.

Live Frogbit Aquatic Plant

Live Frogbit Aquatic Plant

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Frogbit Quick Look

Common Names

Frogbit, Frog bit, Frog's bit, West Indian spongeplant, South American spongeplant, Amazon frogbit, Smooth frogbit, American frogbit (which is actually Limnobium spongia)

Plant Type

Floating plant

Light Requirements

Full sun to partial shade

Plant Hardiness Zones

USDA 4-10



Grow Up To

Roots up to 20 inches long, leaves up to 2.5 inches wide

Flower Color


How to Plant Frogbit in a Pond

You can plant the Frogbit directly on the surface of your pond or aquarium. Simply drop the plant gently onto the water's surface, with the roots pointing down towards the bottom of the water.

The plant will either continue to be free-floating or take root if a substrate is present.

Frogbit Care Guide

You should always prune or trim the leaves and flowers of the Frogbit plant once they start turning brown or yellow. Detach and discard the pruned parts completely to minimize the amount of excess organic material in your pond or water garden.

Frogbit Care Tips

  • Frogbit does not require fertilization – they derive the needed nutrients from your pond water.
  • Keep the temperature of your pond water between 64 and 86-degrees F. This is the optimal temperature range for healthy Frogbit plants. You can monitor the temperature of the water with a pond thermometer.
  • Keep the pH of your pond water between 6.0 and 8.0. You can monitor the pond pH level using a water testing kit or adjust the pH levels using water additives when required.
  • If you live in Zones 5 or lower, discard the Frogbit plants at the end of the first frost.
Live Frogbit Aquatic Plant

Live Frogbit Aquatic Plant

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Frogbit Care Card

Download our free printable care card for the Frogbit plant! Click the care card below and save the PDF file to your computer. You can easily print off the 3x5 care card or access it right from your phone. Get all the important information you need to keep your Frogbit plants healthy and happy!

Plus, we provide a blank card for you to print and fill out yourself. Print it as many times as you like to create cards for all your plants!

Frogbit care card

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How quickly does Frogbit grow?

Frogbit is one of the fastest-growing floating plants out there, so you must monitor its growth. If the conditions are right, the plant produces a new leaf every 2 days, after which it separates from the mother plant.

So, you may get 3x or 4x the number of plants after two to three weeks.

Do goldfish eat Frogbit?

Goldfish, koi, and other common pond fish enjoy eating Frogbit.

Is Frogbit an oxygenator?

Plants naturally improve the oxygen levels in the water. However, as a floating pond plant, Frogbit adds a lesser amount of oxygen to the pond than a submerged plant. The bulk of oxygen produced by floating plants goes into the atmosphere rather than the pond water.

If you’re looking for a good oxygenator, check out our list of the best oxygenating pond plants.

How long do Frogbit roots get?

Frogbit roots can grow up to 20 inches long in the right conditions. Water high in nitrates will help the roots grow to their potential.