Live to Plant

How to Grow Frogbit Plant Outdoors

Updated: March 30, 2022

Frogbit (Limnobium spongia) is a floating aquatic plant that is becoming increasingly popular among gardeners. The plant is native to South America and is known for its ability to remove excess nutrients from water. This makes it an excellent choice for ponds and other water features. Frogbit is easy to grow, and it requires very little maintenance. In this article, we’ll discuss how to grow frogbit plant outdoors.

Choosing the Right Location

Before planting frogbit, you need to choose the right location. Frogbit needs plenty of sunlight to grow, so it’s important to choose a spot that receives at least six hours of direct sunlight each day. It’s also important to choose a location that has calm water, as frogbit doesn’t do well in areas with strong currents.

Preparing the Soil

Unlike most plants, frogbit doesn’t need soil to grow. Instead, it floats on the surface of the water. However, you should still prepare your pond or water feature before planting frogbit. Make sure the water is clean and free of debris. If necessary, add a layer of gravel or sand to the bottom of the pond to provide a surface for the frogbit to anchor onto.

Planting Frogbit

To plant frogbit, simply place it on the surface of the water in your chosen location. The plant will begin to spread out over time, covering the surface of the water with its leaves. Frogbit can be planted at any time during the growing season, but it’s best to do so in early spring when temperatures are still cool.

Caring for Frogbit

Frogbit is a low-maintenance plant that requires very little care. However, there are a few things you can do to help it thrive:

  • Fertilize: Although frogbit doesn’t need soil to grow, it still requires nutrients to thrive. You can add a water-soluble fertilizer to your pond or water feature once a month to provide these nutrients.
  • Remove Dead Leaves: As with any plant, dead leaves can accumulate on the surface of the water. Be sure to remove them regularly to keep your frogbit healthy.
  • Control Algae: Frogbit is an excellent plant for controlling algae, but it can also be affected by it. If you notice excessive algae growth in your pond or water feature, you may need to add an algaecide to keep it under control.

Harvesting Frogbit

Frogbit can be harvested at any time during the growing season. To harvest, simply scoop the plants out of the water using a net. You can use the harvested frogbit in salads or as a garnish for other dishes.


Can Frogbit Survive in Cold Climates?

Yes, frogbit can survive in cold climates. However, it will go dormant during the winter months and may not begin growing again until temperatures warm up in the spring.

Can Frogbit Grow in Saltwater?

No, frogbit cannot grow in saltwater. It requires freshwater to thrive.

Is Frogbit Safe for Fish?

Yes, frogbit is safe for fish. In fact, it can provide a source of shade and shelter for fish in your pond or water feature.

How Fast Does Frogbit Grow?

Frogbit can grow very quickly under ideal conditions. It can double in size in just a few weeks.

Can I Grow Frogbit Indoors?

Yes, you can grow frogbit indoors as long as you have a large container of freshwater and plenty of sunlight. However, it’s important to note that frogbit may not grow as well indoors as it does outdoors.