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Submerged and oxygenating pond plants list :


1- Hornwort Oxygenating Pond Plant

An essential submerged plant for ponds. Delicate feather-like foliage on long stems. It not only helps keep water clear and reduce algae growth, it also provides a spawning area for koi and goldfish and protection for baby fish. Hardy to zone 5. Grows submerged in long branching strands in full sun or partial shade.


Plants come in a mesh bag. Just drop it in the pond or put a small stone in the bag to sink it to the bottom of the pond.

A clear-water plant, click for more info


-IMPORTANT: Please note that during times of extreme weather, live plants will suffer due to extreme temperatures. During winter, do not order live plants when temperatures are expected to go below 20F at the lowest point during the day. During summer, avoid ordering plants when temperatures are above 100F.

-This natural pond plant improves water quality by oxygenating and removing excess nutrients from pond water. Helps neutralize algae

-Can be untied and left to float or can be placed at the bottom of the pond with the attached lead strip. Small fish and invertebrates can hide in its foliage from predators

-Resilient to cold weather and very easy to grow

2- Water Thyme (Elodea canadensis)



3- Common Water-Starwort :

  • Approximate height: Leaves float on the water surface. 

  • Recommended water depth over crown of plant: 10 - 60cm (4 - 24 inches)

  • Flower: None (insignificant)

  • Supplied bare root

A pretty and delicate British native oxygenator, with rosettes of leaves that float on the water surface, and fine stems below. 

4- Marestail. - Hippuris vulgaris :


  • Approximate height: 20cm (8 inches)

  • Recommended water depth over crown of plant: 0 - 30cm (0 - 12 inches)

  • Flower: None

  • Supplied bare root

A British native species. This unusual-looking plant can be grown as a marginal around the edges of the pond with its foliage out of the water, or submerged in the pond as an oxygenator, or a mix of the two (partly submerged). It produces spires of dark-green foliage looking like miniature Christmas trees when growing above the water, while the underwater foliage is a lighter green with an attractive fluffy appearance. In strong sunlight the stems above water will often turn an attractive red colour.

We recommend starting your Hippuris vulgaris off in a pot of 1 litre capacity. Read more on how to pot and care for your plant here.

5-Water Soldier (Winter Hardy) Floating Pond Plant



Water soldiers are very unique floating pond plants because they are winter hardy. As winter approaches, they become less buoyant and sink to the bottom of the pond where they are protected from the ice. When the water warms in the spring they re-surface and begin to grow again. They reproduce by producing small plantlets radiating out from the center of the plant. They provide shade for the pond and shelter for baby fish.


The free-floating Water-soldier rare native aquatic plant which is also grown in garden ponds and often escapes. It can be found mostly in central and eastern England. It grows beneath the water, staying submerged for most of the year. From June to August it surfaces and flowers, displaying white blooms. Like other aquatic plants, it offers resting and sheltering places for aquatic insects like dragonfly and damselfly larvae.


Willow Moss, Common Water Moss.

  • Recommended water depth over base of plant: 10 - 30cm (4 - 12 inches)

  • Flower: None

  • Supplied bare root

  • Sold in portions of approximately one large cupful. 

This pretty native water moss makes a good slow-growing and easy oxygenator, but it is also an excellent habitat for wildife - fish will spawn in its delicate bushy fronds and young amphibians and invertebrates hide in them. It grows attached to logs and stones (or in the garden pond, to the pond sides or plant pots), by means of creeping root-like structures, but it has no true roots and does not need to be potted. Good for shady areas of the pond. 

7- ISOLEPIS CERNUA (Slender club rush)

Distribution and habitat: Isolepis cernua is a species of flowering plant in the sedge family and it is widespread, being native to many regions of the world, including parts of Australasia, Eurasia, Africa, and North and South America. It occurs in fresh to brackish, seasonally waterlogged waterways including creek banks, swamps, floodways, seeps, clay pans and lake edges. It is found on most soil types.


Description: Isolepis cernua is a graceful, grass-like plant that produces dense tufts of tread-like, fresh green leaves arising directly from a creeping underground rootstock. The cylindrical leaves which reseamble stems, grow about 25cm (10 inch) long and each carries at its tip a white to cream coloured flower no bigger than a pin head.
Flowers can appear at any time. Although not particularly interesting in themselves, they provide an attractive contrast to the slim, green line of the leaves. New leaves stand erect at fist, but they begin to arch downward as they age. For this reason Isolepis cernua plants show to best advantage when they have been planted in hanging baskets.


Houseplant care: Isolepis cernua is as an evergreen perennial plant when is grown indoors. 


Light: Place Isolepis cernua plants in medium light. Unlike most indoor plants, they thrive in a position at a south facing window or even at a window that is obstructed by a nearby construction.


Temperature: Normal room temperatures are suitable. These plants, however, will grow actively all year long in temperatures above 13°C (55°F). They can tolerate lower winter temperatures (down to about 7°C (45°F)) but should be given a rest if  indoor temperatures are likely to remain unusually low for more than two or three days.


Watering: During the active growth period (which may be continuous) water plentifully as often as necessary so as to keep the potting mixture thoroughly and constantly moist. Pots may even be permitted to stand in water. If Isolepis cernua plants are grown in hanging baskets, extra care have to be taken as the plants will dry very quickly; they may need a daily soaking in a bucket of water during the active growing period.
If temperatures fall below 12°C (54°F) at any time, it is important to encourage these plants to take a rest period by watering very sparingly, giving only enough to keep the potting mixture from drying out completely.


Feeding: Apply standard liquid fertiliser to actively growing plants about once every four weeks.


Potting and repotting: Use a soil based potting mixture. Move Isolepis cernua plants into slightly larger pots or hanging baskets whenever the tufted growths completely cover the surface of the mixture. Pots bigger than 13cm (5 inch) should not be necessary , since young plants are more attractive than old ones. Split up any clump that has reached the 13cm (5 inch) size pot and use the resulting pieces for propagation.


Gardening: Isolepis cernua is not really a grass, but a sedge which thrives with low maintenance and is very decorative. It is a tender perennial (zones 8-11) generally grown as an annual in cold climates, but it can be kept as a houseplant in a sunny window or greenhouse over the winter. Bring it indoors before freezing temperatures occur and set the pot in a shallow tray of water.


The fading flowers can be removed to maintain the look of the plant and limit its self-seeding. All wandering stems may be cut to control plant growth. Cut back yearly in spring for fresh new growth.


Position: Isolepis cernua thrives in shady position outdoor.


Soil: Any moderately fertile soil (clay, loamy, sandy) which is moisture retentive.
It can be planted on the water’s edge or in the shallows of ponds, positioned so that the water level is no more than 5cm (2 inch) above the soil.


Irrigation: Keep Isolepis cernua in consistently moist soil and keep it moist all year. Will tolerate be planted in water up to 10cm (4 inch).
If used this plant in a water garden, gradually increase the water level it sits in unless it is purchased from an aquatic plants display. This will allow the roots to become accustomed to being submerged.


Fertilisation: Isolepis cernua benefits from fertiliser during the growing season. Use a liquid fertiliser every two weeks during the active growing season.


Propagation: Propagate Isolepis cernua plants by dividing overcrowded clumps, preferably in the spring. Pull the clumps apart gently, making sure that each section retain at least 20 leaves. Plant the section either in 8cm (3 inch) pots or group three or four together in a single hanging basket and treat them immediately in exactly the same way as mature plants.


Isolepis cernua can also be propagated by seed. Sow seed in spring, barely covering the seeds. Keep the soil warm at around 21°C (70°F) and constantly moist.


Plants companions: In a water garden it combines well with Equisetum species (horsetails), Cyperus prolifer (dwarf papyrus) and Canna species (cannas) (but it best to keep each in separate pots).


Toxicity: Both the plant and seeds are poisonous if eaten. Keep it away from children and pets if there is any chance they may play with or ingest them. Handling this plant may cause skin irritation.


Uses and display: Growing in a clumping mound, Isolepis cernua spills over the sides of a container as it grows, making it ideal for a tall planter or even a hanging pot. Eye-catching on its own, this decorative grass also adds texture among a display of foliage and flowering plants. It can be used as ground cover, as waterside plant being a low maintenance plant for bog garden. It is great for pots, especially hanging baskets to highlight its fountain-like foliage.



Foliage – green
Features – flowers
Shape – grassy

Watering in rest period – sparingly
Watering in active growth period – plentifully
Light – medium
Temperature in rest period – min 7°C max 13°C (45-55°F)
Temperature in active growth period – min 13°C max 24°C (55-75°F)
Humidity – high

Height: 22-30cm (9-12 inch)
Hardiness zone: 5a-9b
Evergreen Perennial in hardiness zone: 8-11






Spiked Water Milfoil (Myriophyllum spicatum)

A native oxygenator that can grow at great depths is gradually allowed to acclimatise gradually.  Spiked Water Milfoil produces red foliage and remains submerged the whole time.  

  • Plant Type - Oxygenator

  • Normally Available from - Mid April *

  • Water Depth - 30cm to 450cm

  • Foliage - Deciduous 

  • Height - Submerged

  • Position - Full Sun to Part Shade

  • Growth - Fast

  • Flowers - May to Jun

  • Weighted bunch

  • UK Native

Specific Plant Care:
Can be dropped in pond as a weighted bunch but it benefits from being planted in soil. Once established this plant can grow as deep as 3m.
* Please note when pre-ordering plants:
When ordering multiple plants at the beginning of the season please take note of the 'Normally Available from' in the plant information above.
Your order will be dispatched once all the plants are ready for sale, so it is good idea to order plants within the same month range to avoid delays.
The 'Normally Available From' is a guide only and based on when this plant has been ready for sale in previous seasons.  This is subject to change as our greenhouses are not artificially heated, so we rely on the British weather to be kind to us!





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