Best Lobelia Outdoor Aquatic Plants of 2025

Toby Butcher Avatar
Toby Butcher
Last Updated: 2 Feb 2025

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Lobelia is a type of aquatic plant that can be grown outdoors in ponds or water features. These plants have attractive blue or purple flowers that bloom in the summer months and can add a pop of colour to any water garden. Lobelia plants are easy to care for and can help to stabilise the water quality in your pond by absorbing excess nutrients. They also provide shelter for fish and other aquatic creatures. If you are looking to add some beauty and life to your outdoor water feature, consider adding Lobelia aquatic plants.

At a Glance: Our Top Picks

PondPlantsUK 2 x Marginal Plants Cover #TOP 1
PondPlantsUK 2 x Marginal Plants
ftb score rating icon 9.8
Lincolnshire Pond Plants Ltd Marginal Plants Cover #TOP 2
Lincolnshire Pond Plants Ltd Marginal Plants
ftb score rating icon 9.7
k2aqua 10 Stems Elodea Densa Aquatic Plants Cover #TOP 3
k2aqua 10 Stems Elodea Densa Aquatic Plants
ftb score rating icon 9.5

Top 10 Lobelia Outdoor Aquatic Plants

#TOP 1

PondPlantsUK 2 x Marginal Plants

PondPlantsUK 2 x Marginal Plants Cover
PondPlantsUK 2 x Marginal Plants - Including a pot and compost - Live Water Plant Aquatic Pond Lake Marginal (Lobelia fulgens 'Queen Victoria')

Features
Supplied With A 3ltr Pot And Compost
Marginal Pond Plants With Full Planting Guide Included
Max Growth Height: 90cm - Max Growth Spread: 30cm - Depth To Plant Below Water 0-10cm
Helping To Connect Customers With The Direct Growers
Amazing Quality Plants Grown In The Uk
#TOP 2

Lincolnshire Pond Plants Ltd Marginal Plants

Lincolnshire Pond Plants Ltd Marginal Plants Cover
Lincolnshire Pond Plants Ltd Marginal Plants - Live Water Plant Aquatic Pond Lake Marginal - Pond Plants (Lobelia Siphilitica) - 9cm Bareroot

Features
Blooming Period: The Blooming Period Occurs In Late Summer To Early Fall.
Size: Great Blue Lobelia Typically Grows To A Height Of 60 - 90cm.
Winter Hardy
Maintenance Difficulty: This Plant Is Relatively Low-Maintenance.
Light Requirement: Great Blue Lobelia Thrives In Partial Shade To Full Sun.
#TOP 3

k2aqua 10 Stems Elodea Densa Aquatic Plants

Green
k2aqua 10 Stems Elodea Densa Aquatic Plants Cover
k2aqua - 10 ELODEA DENSA - Oxygenating Weed Live Pond Plant Water Aquarium Aquatic Plants Egeria

The k2aqua Elodea Densa is an excellent choice for enhancing your aquarium or outdoor pond. With 10 stems ranging from 12 to 25 cm in length, these rootless plants are easy to manage and set up. They grow quickly, providing essential oxygen for your aquatic environment, which is beneficial for the overall health of your fish. Additionally, Elodea Densa helps to reduce the risk of algae growth, keeping your water clear and clean. However, please note that they are not safe for shrimp.

What We Like
Fast growing oxygenator
Reduces algae growth
Easy to manage
Perfect for ponds and aquariums
#TOP 4

Lincolnshire Pond Plants Marginal Aquatic Plant

Lincolnshire Pond Plants Marginal Aquatic Plant Cover
Lincolnshire Pond Plants Ltd Marginal Plants - Live Water Plant Aquatic Pond Lake Marginal - Pond Plants (Caltha Palustris) - 9cm Bareroot

The Lincolnshire Pond Plants Marginal is an excellent choice for enhancing your pond or lake. Standing at a height of 30cm, it provides a beautiful presence while offering a spread of 40cm, ideal for creating a lush aquatic environment. With a planting depth of 2-15cm above the pot, you can easily adjust it to suit your water level. You will enjoy its stunning flowers from March to June, making it a vibrant addition to your garden, whether placed in full sun or partial shade.

What We Like
Attractive flowering months
Easy depth adjustment
Ideal for sun or shade
Great for pond aesthetics
#TOP 5

Lincolnshire Pond Plants Caltha Palustris Marginal

Lincolnshire Pond Plants Caltha Palustris Marginal Cover
Lincolnshire Pond Plants Ltd Marginal Plants - Live Water Plant Aquatic Pond Lake Marginal - Pond Plants (Caltha Palustris) - 9cm Bareroot

The Lincolnshire Pond Plants Marginal is an excellent choice for enhancing your outdoor aquatic space. With a height of 30cm and a spread of 40cm, it adds a vibrant touch to your pond or lake. The plant flourishes in full sun or partial shade, allowing you to place it in various locations. Blooming from March to June, it provides beautiful flowers during the spring and early summer, bringing life and colour to your garden. The ideal planting depth of 2-15cm above the pot ensures that you can easily position it for optimal growth.

What We Like
Attractive spring blooms
Adaptable to sun or shade
Compact size for small ponds
Easy to position in water
#TOP 6

Lincolnshire Pond Plants Ltd Marginal Plants

Lincolnshire Pond Plants Ltd Marginal Plants Cover
Lincolnshire Pond Plants Ltd Marginal Plants - Live Water Plant Aquatic Pond Lake Marginal - Pond Plants (Typha Angustifolia) - 7cm Plug

Features
Spread: Can Spread Up To 3 To 6 Feet (90 To 180 Cm) Or More. It Spreads Aggressively Via Rhizomes And Can Form Dense Stands.
Height: Typically Grows Up To 5 To 8 Feet (150 To 240 Cm).
Sunlight: Prefers Full Sun. It Thrives Best In Sunny Locations But Can Tolerate Partial Shade.
Maintenance: Moderate To High. Typha Angustifolia Is Relatively Easy To Care For.
Bloom Time: Summer, Usually From June To August. The Plant Produces Distinctive Cylindrical Flower Spikes With A Brown, Cigar-Like Appearance.
#TOP 7

50 Elodea Densa Stems for Aquariums

Green
50 Elodea Densa Stems for Aquariums Cover
50 ELODEA DENSA Stems - 5 Bunches - Oxygenating Weed Live Pond Plant Water Aquarium Aquatic Plants Egeria k2aqua

The Elodea Densa Stems are an excellent choice for enhancing your aquarium or outdoor pond. With 50 stems in 5 bunches, each measuring between 12-25cm, they adapt well to various aquatic environments. As a fast-growing, oxygenating plant, they help improve water quality, making your aquatic habitat healthier for fish and other inhabitants. Additionally, Elodea densa reduces the risk of algae growth, providing a cleaner and more vibrant aquatic setting for you to enjoy.

What We Like
Fast-growing oxygenator
Minimises algae risk
Rootless and easy to use
Ideal for aquariums and ponds
#TOP 8

k2aqua Elodea Densa Live Pond Plants

Green
k2aqua Elodea Densa Live Pond Plants Cover
k2aqua - 5 ELODEA DENSA - Oxygenating Weed Live Pond Plant Water Aquarium Aquatic Plants Egeria

The k2aqua Elodea Densa is a fantastic addition to your aquarium or outdoor pond. With five rootless stems measuring between 12-25 cm, these plants provide a natural and beautiful aesthetic. They grow quickly, ensuring your water environment is oxygenated, which is essential for the health of your aquatic life. Additionally, Elodea Densa helps to minimise the risk of algae growth, making it easier for you to maintain a clean and vibrant aquatic space.

What We Like
Fast-growing oxygenating plant
Minimises algae risk
Rootless for easy placement
Perfect for ponds and aquariums
Comes with lead weights
#TOP 9

Lincolnshire Pond Plants Ltd Live Plants Tropical Aquatic Plants

Lincolnshire Pond Plants Ltd Live Plants Tropical Aquatic Plants Cover
Lincolnshire Pond Plants Ltd Live Plants Tropical Aquatic Plants - Potted - Ceramic - Loose - Kits (Potted, Hydrocotyle Leucocephala)

Features
Area/Height: Background Up To 60 Cm
Hydrocotyle Leucocephala Or Brazialian Pennywort Is One Of The Less Demanding Stem Plants. Excellent For A Beginner Or A New Set-Up, This Grows Very Quickly But Gives A Stunning Display. NOT Shrimp Safe.
Light/Temperature: High-Medium / 22-28 Degrees C
Growth/pH/CO2: Fast / 5-9 / 20-30 Mg/l
#TOP 10

Lincolnshire Pond Plants Ltd Marginal Plants

Lincolnshire Pond Plants Ltd Marginal Plants Cover
Lincolnshire Pond Plants Ltd Marginal Plants - Live Water Plant Aquatic Pond Lake Marginal - Pond Plants (Eriophorum Angustifolium) - 9cm Bareroot

Features
Spread: The Spread Is Around 30 Cm (1 Foot), But It Can Form Large Colonies Over Time Through Its Rhizome System.
Max Height: Eriophorum Angustifolium Typically Grows Up To 60 Cm (2 Feet) Tall.
Maintenance: Low.
Light: Prefers Full Sun To Partial Shade.
Blooming Months: This Plant Typically Blooms From Late Spring To Early Summer, Usually Around May To July. The Flowers Are Not Very Conspicuous, But The White, Cotton-Like Seed Heads That Follow Are Quite Distinctive.
Buying Guide Image
Editor's Notes

During our lobelia outdoor aquatic plant research, we found 27 lobelia outdoor aquatic plant products and shortlisted 10 quality products. We collected and analyzed 20,112 customer reviews through our big data system to write the lobelia outdoor aquatic plants list. We found that most customers choose lobelia outdoor aquatic plants with an average price of £11.85.

The lobelia outdoor aquatic plants are available for purchase. We have researched hundreds of brands and picked the top brands of lobelia outdoor aquatic plants, including PondPlantsUK, Lincolnshire Pond Plants Ltd, k2aqua. The seller of top 1 product has received honest feedback from 1,457 consumers with an average rating of 4.7.

Written by
Toby Butcher Avatar

Toby Butcher is a Horticulturist, and he earned his title as a Master Gardener in 2016. Toby has acquired a 25-year experience as a home gardener planting, designing, grooming vegetables and flowers. He is the leader of a plant group in Durham. Toby owns a blog where he publishes articles on growing and growing your flowers at home, in a vase, or in a garden.