Aquatic plants improve the appearance of backyard ponds while supporting water quality, providing shade, absorbing excess nutrients, and creating habitat for fish and wildlife.
A balanced pond should include a combination of four aquatic plant types:
- Waterlilies: Provide colorful flowers, surface shade, and shelter for fish.
- Marginal plants: Grow along pond edges and shallow-water planting shelves.
- Floating plants: Float on the water's surface and absorb nutrients directly from the water.
- Submerged plants: Grow primarily underwater and help absorb nutrients while providing fish habitat.
Choosing plants from several categories creates a more natural and balanced pond ecosystem.
1. Waterlilies and waterlily-like plants
Waterlilies grow from roots or rhizomes anchored in planting media, producing floating leaves and colorful flowers. Their leaves shade the pond, helping reduce sunlight penetration and providing shelter for fish.
Popular varieties
Waterlilies (Nymphaea spp.)
- Produce floating leaves and flowers in white, pink, yellow, red, and other colors.
- Grow best with at least six hours of direct sunlight daily.
- Typical planting depth is 12–24 in. (30–61 cm), depending on the variety.
- Hardy varieties can overwinter outdoors when protected from freezing, while tropical varieties may require indoor protection.
Water Snowflake (Nymphoides spp.)
- Produces small floating leaves with delicate white or yellow fringed flowers.
- Spreads across the surface, creating shade and reducing sunlight available for algae growth.
- Grows best in calm water away from heavy waterfall or fountain spray.
- May require thinning to prevent excessive surface coverage.
Water Poppy (Hydrocleys nymphoides)
- Features rounded floating leaves and bright yellow flowers.
- Prefers warm temperatures and full sunlight.
- Provides seasonal flowers and surface coverage.
- May require winter protection in colder climates.
Mosaic Plant (Ludwigia sedioides)
- Produces distinctive geometric patterns of small green and reddish leaves.
- Prefers warm water and full sunlight.
- Adds unusual surface texture to ponds and container water gardens.
- Requires protection from freezing temperatures.
2. Marginal pond plants
Marginal plants grow in shallow water or consistently moist soil along pond edges. They help absorb excess nutrients, provide wildlife habitat, and soften the appearance of rocks and pond borders.
Popular varieties
Creeping Jenny (Lysimachia nummularia)
- Low-growing plant with rounded green or golden leaves.
- Spreads over rocks and pond edges, creating a natural appearance.
- Prefers full sun to partial shade and moist soil.
- May spread aggressively and should be managed where necessary.
Pickerel Plant (Pontederia cordata)
- Features upright green leaves and blue-purple flower spikes.
- Grows in shallow water with full sun to partial shade.
- Attracts pollinators and helps absorb nutrients.
Horsetail Reed (Equisetum hyemale)
- Produces tall, segmented green stems with dark bands.
- Adds vertical structure to pond edges.
- Grows in moist soil or shallow water.
- Spreads aggressively and is best contained in an aquatic planter.
Taro or Elephant Ear (Colocasia spp.)
- Produces large, heart-shaped leaves with a tropical appearance.
- Prefers warm temperatures and consistently moist conditions.
- Adds height and foliage around pond edges.
- Many varieties require winter protection in cold climates.
Cardinal Flower (Lobelia cardinalis)
- Produces bright red flowers on upright stems.
- Attracts hummingbirds, butterflies, and other pollinators.
- Prefers moist soil or shallow water with full sun to partial shade.
Blue Iris (Iris spp.)
- Produces upright, sword-shaped leaves and colorful flowers.
- Grows in moist soil or shallow water.
- Provides spring color and wildlife habitat.
- Choose aquatic iris species appropriate for your climate and local regulations.
Sweet Flag (Acorus gramineus 'Ogon')
- Features narrow green and golden-yellow striped leaves.
- Grows in moist soil or shallow water.
- Adds color and texture around pond edges.
- Performs well in full sun to partial shade.
3. Floating pond plants
Floating aquatic plants remain on the water's surface, with roots extending into the water below. They absorb nutrients directly from the pond and provide shade that helps limit algae growth.
Popular varieties
Water Lettuce (Pistia stratiotes)
- Forms floating rosettes of light-green leaves resembling lettuce.
- Absorbs excess nutrients directly from pond water.
- Provides shade and shelter for small fish.
- Grows rapidly in warm conditions and may require regular thinning.
Water Hyacinth (Pontederia crassipes)
- Produces glossy green leaves and lavender-purple flowers.
- Has extensive hanging roots that absorb nutrients from the water.
- Provides shade and cover for fish.
- Grows rapidly in warm weather.
Frogbit (Limnobium spp.)
- Produces small, rounded floating leaves with hanging roots.
- Provides surface shade and absorbs excess nutrients.
- Prefers relatively calm water.
- Requires thinning to prevent excessive coverage.
Fairy Moss (Azolla spp.)
- Small floating fern that may develop reddish foliage in bright sunlight.
- Spreads across calm water surfaces.
- Absorbs nutrients and provides surface coverage.
- Can multiply quickly and requires regular management.
Sensitive Plant (Neptunia oleracea)
- Produces floating stems, delicate leaves, and small yellow flowers.
- Leaves fold when touched.
- Prefers warm conditions and full sunlight.
- Adds unusual foliage to tropical water gardens.
Important: Water lettuce, water hyacinth, frogbit, and other floating plants may be invasive or restricted in certain locations. Check local regulations before purchasing or introducing these plants. Never release unwanted aquatic plants into natural waterways.
4. Submerged pond plants (oxygenators)
Submerged aquatic plants grow primarily underwater. Many absorb nutrients directly from pond water, helping reduce nutrients available for algae growth.
Submerged plants also provide shelter, spawning areas, and hiding places for fish and young fish.
Popular varieties
Anacharis (Egeria densa)
- Produces long, flexible stems with narrow green leaves.
- Absorbs dissolved nutrients from pond water.
- Provides underwater shelter for fish.
- May grow rapidly and is restricted in some locations.
Hornwort (Ceratophyllum demersum)
- Features fine, feathery underwater foliage.
- Absorbs nutrients directly from the water.
- Provides hiding places for small fish and aquatic organisms.
- Can grow without being rooted in planting media.
Cabomba (Cabomba spp.)
- Produces delicate, fan-shaped underwater leaves.
- Adds texture to underwater planting areas.
- Absorbs nutrients and provides fish habitat.
- Availability and suitability vary by species and local regulations.
Other submerged aquatic plants include Vallisneria and suitable native pond grasses.
Important: Although submerged plants release oxygen during photosynthesis, they do not replace adequate pond aeration and circulation.
How do I choose the right pond plants?
Select aquatic plants based on the pond's size, sunlight, water depth, climate, and fish population.
- Include different plant types: Combine waterlilies, marginal plants, floating plants, and submerged plants whenever practical.
- Provide shade: Aim for approximately 40–60% surface coverage or shading during the growing season, while maintaining open water for gas exchange.
- Consider sunlight: Most flowering waterlilies perform best with at least six hours of direct sunlight.
- Choose appropriate planting depths: Place plants at depths suitable for their individual varieties.
- Check climate requirements: Select hardy plants suited to your USDA Hardiness Zone or plan for winter protection.
- Consider fish activity: Choose plants that provide shelter and can withstand activity from koi or other pond fish.
- Prevent overcrowding: Thin rapidly spreading plants to maintain open water and healthy circulation.
- Avoid invasive species: Confirm local restrictions before adding unfamiliar aquatic plants.
Should pond plants be grown in containers?
Using aquatic planters is recommended for many rooted pond plants because containers help:
- Control root growth and prevent excessive spreading.
- Keep aquatic planting media contained.
- Make plants easier to reposition or remove.
- Simplify fertilizing, dividing, and seasonal maintenance.
Aquascape aquatic planters are suitable for many waterlilies and marginal aquatic plants. Floating plants generally do not require planters.
Benefits of adding aquatic plants to a pond
A combination of aquatic plants provides several important benefits:
- Natural filtration: Plants absorb nutrients that might otherwise contribute to algae growth.
- Shade: Floating leaves reduce direct sunlight reaching the water.
- Fish protection: Aquatic vegetation provides shelter and hiding places.
- Wildlife habitat: Flowering plants attract pollinators, including butterflies and hummingbirds.
- Improved appearance: Different plant heights, colors, and textures create a natural-looking landscape.
- Ecosystem balance: A variety of aquatic plants supports biological diversity throughout the pond.
Aquatic plants are an important part of a balanced pond ecosystem, but they work best alongside proper filtration, circulation, aeration, and routine pond maintenance.